4.1.16

- Renamed port proxy and SNI handler source files to classes.pp.portproxy.js and classes.pp.snihandler.js respectively
- Updated import paths in index.ts and test files (e.g. in test.ts and test.router.ts) to reference the new file names
- This refactor improves code organization but breaks direct imports from the old paths

changelog.md

@@ -1,5 +1,164 @@
 # Changelog
 
+## 2025-03-17 - 4.1.16 - fix(tls)
+Improve TLS alert handling in connection handler: use the new TlsAlert class to send proper unrecognized_name alerts when a ClientHello is missing SNI and wait for a retry on the same connection before closing. Also, add alertFallbackTimeout tracking to connection records for better timeout management.
+
+- Replaced hardcoded alert buffers in ConnectionHandler with calls to the TlsAlert class.
+- Removed old warnings and implemented a mechanism to remove existing 'data' listeners and await a new ClientHello.
+- Introduced alertFallbackTimeout property in connection records to track fallback timeout and ensure proper cleanup.
+- Extended the delay before closing the connection after sending an alert, providing the client more time to retry.
+
+## 2025-03-17 - 4.1.15 - fix(connectionhandler)
+Delay socket termination in TLS session resumption handling to allow proper alert processing
+
+- Removed the immediate socket.end() call in finishConnection and moved it inside the setTimeout, ensuring that clients (especially Chrome) have additional time to process the TLS alert before connection termination
+- This prevents premature socket closure on ClientHello without SNI when session tickets are disallowed
+
+## 2025-03-17 - 4.1.14 - fix(ConnectionHandler)
+Use the correct TLS alert data and increase the delay before socket termination when session resumption without SNI is detected.
+
+- Replaced certificateExpiredAlert with serverNameUnknownAlertData for sending the appropriate alert.
+- Increased the cleanup delay from 1000ms to 5000ms to allow a more graceful termination.
+
+## 2025-03-17 - 4.1.13 - fix(tls-handshake)
+Set certificate_expired TLS alert level to warning instead of fatal to allow graceful termination.
+
+- In the TLS handshake alert for certificate_expired (0x2F), changed the alert level from 0x02 (fatal) to 0x01 (warning).
+- This change avoids abrupt connection termination, enabling a smoother handling of certificate expiration alerts.
+
+## 2025-03-17 - 4.1.12 - fix(classes.pp.connectionhandler)
+Replace unrecognized_name alert data with certificate_expired alert in TLS handshake handling for session resumption without SNI
+
+- Switched the alert payload from serverNameUnknownAlertData to a new certificateExpiredAlert buffer
+- Now sends a fatal certificate_expired alert (code 47) instead of a warning unrecognized_name alert
+- Improves TLS error reporting and encourages immediate disconnection when a ClientHello lacks SNI and session tickets are disallowed
+
+## 2025-03-17 - 4.1.11 - fix(connectionhandler)
+Increase delay before cleaning up connections when session resumption is blocked due to missing SNI, allowing more natural socket termination.
+
+- Changed cleanup delay in ts/classes.pp.connectionhandler.ts from 300ms to 1000ms.
+- This fix ensures that sockets get sufficient time to terminate gracefully.
+
+## 2025-03-16 - 4.1.10 - fix(connectionhandler)
+Increase delay timings for TLS alert transmission in session ticket blocking to allow graceful socket termination
+
+- Updated finishConnection: replaced immediate socket.destroy with a graceful end call
+- Increased delay after successful write from 50ms to 200ms to allow alert processing
+- Raised safety timeout from 250ms to 400ms when waiting for 'drain' event
+
+## 2025-03-16 - 4.1.9 - fix(ConnectionHandler)
+Replace closeNotify alert with handshake failure alert in TLS ClientHello handling to properly signal missing SNI and enforce session ticket restrictions.
+
+- Switched alert data sent on missing SNI from closeNotifyAlert to sslHandshakeFailureAlertData.
+- Ensures consistent TLS alert behavior during handshake failure.
+
+## 2025-03-16 - 4.1.8 - fix(ConnectionHandler/tls)
+Change the TLS alert sent when a ClientHello lacks SNI: use the close_notify alert instead of handshake_failure to prompt immediate retry with SNI.
+
+- Replaced the previously sent handshake_failure alert (code 0x28) with a close_notify alert (code 0x00) in the TLS session resumption handling in ConnectionHandler.
+- This change encourages clients to immediately retry and include SNI when allowSessionTicket is false.
+
+## 2025-03-16 - 4.1.7 - fix(classes.pp.connectionhandler)
+Improve TLS alert handling in ClientHello when SNI is missing and session tickets are disallowed
+
+- Replace the unrecognized_name alert with a handshake_failure alert to ensure better client behavior.
+- Refactor the alert sending mechanism using cork/uncork and add a safety timeout for the drain event.
+- Enhance logging for debugging TLS handshake failures when SNI is absent.
+
+## 2025-03-16 - 4.1.6 - fix(tls)
+Refine TLS ClientHello handling when allowSessionTicket is false by replacing extensive alert timeout logic with a concise warning alert and short delay, encouraging immediate client retry with proper SNI
+
+- Update the TLS alert sending mechanism to use cork/uncork and a short, fixed delay instead of long timeouts
+- Remove redundant event listeners and excessive cleanup logic after sending the alert
+- Improve code clarity and encourage clients (e.g., Chrome) to retry handshake with SNI more responsively
+
+## 2025-03-16 - 4.1.5 - fix(TLS/ConnectionHandler)
+Improve handling of TLS session resumption without SNI by sending an 'unrecognized_name' alert instead of immediately terminating the connection. This change adds a grace period for the client to retry the handshake with proper SNI and cleans up the connection if no valid response is received.
+
+- Send a TLS warning (unrecognized_name alert, code 112) when a ClientHello is received without SNI and session tickets are disallowed.
+- Utilize socket cork/uncork to ensure the alert is sent as a single packet.
+- Add a 5-second alert timeout and a subsequent 30-second grace period to allow clients to initiate a new handshake with SNI.
+- Clean up and terminate the connection if no valid SNI is provided after the grace period, logging appropriate termination reasons.
+
+## 2025-03-15 - 4.1.4 - fix(ConnectionHandler)
+Refactor ConnectionHandler code formatting for improved readability and consistency in log messages and whitespace handling
+
+- Standardized indentation and spacing in method signatures and log statements
+- Aligned inline comments and string concatenations for clarity
+- Minor refactoring of parameter formatting without changing functionality
+
+## 2025-03-15 - 4.1.3 - fix(connectionhandler)
+Improve handling of TLS ClientHello messages when allowSessionTicket is disabled and no SNI is provided by sending a warning alert (unrecognized_name, code 0x70) with a proper callback and delay to ensure the alert is transmitted before closing the connection.
+
+- Replace the fatal alert (0x02/0x40) with a warning alert (0x01/0x70) to notify clients to send SNI.
+- Use socket.write callback to wait 100ms after sending the alert before terminating the connection.
+- Remove the previous short (50ms) delay in favor of a more reliable delay mechanism before cleanup.
+
+## 2025-03-15 - 4.1.2 - fix(connectionhandler)
+Send proper TLS alert before terminating connections when SNI is missing and session tickets are disallowed.
+
+- Added logic to transmit a fatal TLS alert (Handshake Failure) before closing the connection when no SNI is present with allowSessionTicket=false.
+- Introduced a slight 50ms delay after sending the alert to ensure the client receives the alert properly.
+- Applied these changes both for the initial ClientHello and when handling subsequent TLS data.
+
+## 2025-03-15 - 4.1.1 - fix(tls)
+Enforce strict SNI handling in TLS connections by terminating ClientHello messages lacking SNI when session tickets are disallowed and removing legacy session cache code.
+
+- In classes.pp.connectionhandler.ts, if allowSessionTicket is false and no SNI is extracted from a ClientHello, the connection is terminated to force a new handshake with SNI.
+- In classes.pp.snihandler.ts, removed session cache and related cleanup functions used for tab reactivation, simplifying SNI extraction logic.
+- Improved logging in TLS processing to aid in diagnosing handshake and session resumption issues.
+
+## 2025-03-14 - 4.1.0 - feat(SniHandler)
+Enhance SNI extraction to support session caching and tab reactivation by adding session cache initialization, cleanup and helper methods. Update processTlsPacket to use cached SNI for session resumption and connection racing scenarios.
+
+- Introduce initSessionCacheCleanup, cleanupSessionCache, createClientKey, cacheSession, and getCachedSession methods to manage SNI information.
+- Cache SNI based on client IP and client random to improve handling of fragmented ClientHello messages and tab reactivation.
+- Update processTlsPacket to leverage cached SNI when standard extraction fails, reducing redundant extraction and enhancing connection racing behavior.
+
+## 2025-03-14 - 4.0.0 - BREAKING CHANGE(core)
+refactor: reorganize internal module structure to use 'classes.pp.*' modules
+
+- Renamed port proxy and SNI handler source files to 'classes.pp.portproxy.js' and 'classes.pp.snihandler.js' respectively
+- Updated import paths in index.ts and test files (e.g. in test.ts and test.router.ts) to reference the new file names
+- This refactor improves code organization but breaks direct imports from the old paths
+
+- Renamed 'ts/classes.portproxy.ts' to 'ts/classes.pp.portproxy.ts'
+- Renamed 'ts/classes.snihandler.ts' to 'ts/classes.pp.snihandler.ts'
+- Updated exports in index.ts to export from 'classes.pp.portproxy.js' and 'classes.pp.snihandler.js'
+- Updated test files to import modules from new paths
+
+## 2025-03-12 - 3.41.8 - fix(portproxy)
+Improve TLS handshake timeout handling and connection piping in PortProxy
+
+- Increase the default initial handshake timeout from 60 seconds to 120 seconds
+- Add a 30-second grace period before terminating connections waiting for initial TLS data
+- Refactor piping logic by removing redundant callback and establishing piping immediately after flushing buffered data
+- Enhance debug logging during TLS ClientHello processing for improved SNI extraction insights
+
+## 2025-03-12 - 3.41.7 - fix(core)
+Refactor PortProxy and SniHandler: improve configuration handling, logging, and whitespace consistency
+
+- Standardized indentation and spacing for configuration properties in PortProxy settings (e.g. ACME options, keepAliveProbes, allowSessionTicket)
+- Simplified conditional formatting and improved inline comments in PortProxy
+- Enhanced logging messages in SniHandler for TLS handshake and session resumption detection
+- Improved debugging output (e.g. hexdump of initial TLS packet) and consistency of multi-line expressions
+
+## 2025-03-12 - 3.41.6 - fix(SniHandler)
+Refactor SniHandler: update whitespace, comment formatting, and consistent type definitions
+
+- Unified inline comment style and spacing in SniHandler
+- Refactored session cache type declaration for clarity
+- Adjusted buffer length calculations to include TLS record header consistently
+- Minor improvements to logging messages during ClientHello reassembly and SNI extraction
+
+## 2025-03-12 - 3.41.5 - fix(portproxy)
+Enforce TLS handshake and SNI validation on port 443 by blocking non-TLS connections and terminating session resumption attempts without SNI when allowSessionTicket is disabled.
+
+- Added explicit check to block non-TLS connections on port 443 to ensure proper TLS usage.
+- Enhanced logging for TLS ClientHello to include details on SNI extraction and session resumption status.
+- Terminate connections with missing SNI by setting termination reasons ('session_ticket_blocked' or 'no_sni_blocked').
+- Ensured consistent rejection of non-TLS handshakes on standard HTTPS port.
+
 ## 2025-03-12 - 3.41.4 - fix(tls/sni)
 Improve logging for TLS session resumption by extracting and logging SNI values from ClientHello messages.
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@push.rocks/smartproxy",
-  "version": "3.41.4",
+  "version": "4.1.16",
   "private": false,
   "description": "A powerful proxy package that effectively handles high traffic, with features such as SSL/TLS support, port proxying, WebSocket handling, dynamic routing with authentication options, and automatic ACME certificate management.",
   "main": "dist_ts/index.js",

test/test.portproxy.ts

@@ -1,6 +1,6 @@
 import { expect, tap } from '@push.rocks/tapbundle';
 import * as net from 'net';
-import { PortProxy } from '../ts/classes.portproxy.js';
+import { PortProxy } from '../ts/classes.pp.portproxy.js';
 
 let testServer: net.Server;
 let portProxy: PortProxy;
@@ -299,8 +299,8 @@ tap.test('should use round robin for multiple target IPs in domain config', asyn
   
   // Don't track this proxy as it doesn't actually start or listen
   
-  const firstTarget = (proxyInstance as any).getTargetIP(domainConfig);
-  const secondTarget = (proxyInstance as any).getTargetIP(domainConfig);
+  const firstTarget = proxyInstance.domainConfigManager.getTargetIP(domainConfig);
+  const secondTarget = proxyInstance.domainConfigManager.getTargetIP(domainConfig);
   expect(firstTarget).toEqual('hostA');
   expect(secondTarget).toEqual('hostB');
 });

test/test.ts

@@ -226,8 +226,8 @@ tap.test('should start the proxy server', async () => {
   // Awaiting the update ensures that the SNI context is added before any requests come in.
   await testProxy.updateProxyConfigs([
     {
-      destinationIp: '127.0.0.1',
-      destinationPort: '3000',
+      destinationIps: ['127.0.0.1'],
+      destinationPorts: [3000],
       hostName: 'push.rocks',
       publicKey: testCertificates.publicKey,
       privateKey: testCertificates.privateKey,
@@ -280,8 +280,8 @@ tap.test('should support WebSocket connections', async () => {
   // Reconfigure proxy with test certificates if necessary
   await testProxy.updateProxyConfigs([
     {
-      destinationIp: '127.0.0.1',
-      destinationPort: '3000',
+      destinationIps: ['127.0.0.1'],
+      destinationPorts: [3000],
       hostName: 'push.rocks',
       publicKey: testCertificates.publicKey,
       privateKey: testCertificates.privateKey,

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartproxy',
-  version: '3.41.4',
+  version: '4.1.16',
   description: 'A powerful proxy package that effectively handles high traffic, with features such as SSL/TLS support, port proxying, WebSocket handling, dynamic routing with authentication options, and automatic ACME certificate management.'
 }

ts/classes.pp.acmemanager.ts

@@ -0,0 +1,149 @@
+import type { IPortProxySettings } from './classes.pp.interfaces.js';
+import { NetworkProxyBridge } from './classes.pp.networkproxybridge.js';
+
+/**
+ * Manages ACME certificate operations
+ */
+export class AcmeManager {
+  constructor(
+    private settings: IPortProxySettings,
+    private networkProxyBridge: NetworkProxyBridge
+  ) {}
+  
+  /**
+   * Get current ACME settings
+   */
+  public getAcmeSettings(): IPortProxySettings['acme'] {
+    return this.settings.acme;
+  }
+  
+  /**
+   * Check if ACME is enabled
+   */
+  public isAcmeEnabled(): boolean {
+    return !!this.settings.acme?.enabled;
+  }
+  
+  /**
+   * Update ACME certificate settings
+   */
+  public async updateAcmeSettings(acmeSettings: IPortProxySettings['acme']): Promise<void> {
+    console.log('Updating ACME certificate settings');
+    
+    // Check if enabled state is changing
+    const enabledChanging = this.settings.acme?.enabled !== acmeSettings.enabled;
+    
+    // Update settings
+    this.settings.acme = {
+      ...this.settings.acme,
+      ...acmeSettings,
+    };
+    
+    // Get NetworkProxy instance
+    const networkProxy = this.networkProxyBridge.getNetworkProxy();
+    
+    if (!networkProxy) {
+      console.log('Cannot update ACME settings - NetworkProxy not initialized');
+      return;
+    }
+    
+    try {
+      // If enabled state changed, we need to restart NetworkProxy
+      if (enabledChanging) {
+        console.log(`ACME enabled state changed to: ${acmeSettings.enabled}`);
+        
+        // Stop the current NetworkProxy
+        await this.networkProxyBridge.stop();
+        
+        // Reinitialize with new settings
+        await this.networkProxyBridge.initialize();
+        
+        // Start NetworkProxy with new settings
+        await this.networkProxyBridge.start();
+      } else {
+        // Just update the settings in the existing NetworkProxy
+        console.log('Updating ACME settings in NetworkProxy without restart');
+        
+        // Update settings in NetworkProxy
+        if (networkProxy.options && networkProxy.options.acme) {
+          networkProxy.options.acme = { ...this.settings.acme };
+          
+          // For certificate renewals, we might want to trigger checks with the new settings
+          if (acmeSettings.renewThresholdDays !== undefined) {
+            console.log(`Setting new renewal threshold to ${acmeSettings.renewThresholdDays} days`);
+            networkProxy.options.acme.renewThresholdDays = acmeSettings.renewThresholdDays;
+          }
+          
+          // Update other settings that might affect certificate operations
+          if (acmeSettings.useProduction !== undefined) {
+            console.log(`Setting ACME to ${acmeSettings.useProduction ? 'production' : 'staging'} mode`);
+          }
+          
+          if (acmeSettings.autoRenew !== undefined) {
+            console.log(`Setting auto-renewal to ${acmeSettings.autoRenew ? 'enabled' : 'disabled'}`);
+          }
+        }
+      }
+    } catch (err) {
+      console.log(`Error updating ACME settings: ${err}`);
+    }
+  }
+  
+  /**
+   * Request a certificate for a specific domain
+   */
+  public async requestCertificate(domain: string): Promise<boolean> {
+    // Validate domain format
+    if (!this.isValidDomain(domain)) {
+      console.log(`Invalid domain format: ${domain}`);
+      return false;
+    }
+    
+    // Delegate to NetworkProxyManager
+    return this.networkProxyBridge.requestCertificate(domain);
+  }
+  
+  /**
+   * Basic domain validation
+   */
+  private isValidDomain(domain: string): boolean {
+    // Very basic domain validation
+    if (!domain || domain.length === 0) {
+      return false;
+    }
+    
+    // Check for wildcard domains (they can't get ACME certs)
+    if (domain.includes('*')) {
+      console.log(`Wildcard domains like "${domain}" are not supported for ACME certificates`);
+      return false;
+    }
+    
+    // Check if domain has at least one dot and no invalid characters
+    const validDomainRegex = /^[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;
+    if (!validDomainRegex.test(domain)) {
+      console.log(`Domain "${domain}" has invalid format`);
+      return false;
+    }
+    
+    return true;
+  }
+  
+  /**
+   * Get eligible domains for ACME certificates
+   */
+  public getEligibleDomains(): string[] {
+    // Collect all eligible domains from domain configs
+    const domains: string[] = [];
+    
+    for (const config of this.settings.domainConfigs) {
+      // Skip domains that can't be used with ACME
+      const eligibleDomains = config.domains.filter(domain => 
+        !domain.includes('*') && this.isValidDomain(domain)
+      );
+      
+      domains.push(...eligibleDomains);
+    }
+    
+    return domains;
+  }
+}

ts/classes.pp.connectionmanager.ts

@@ -0,0 +1,446 @@
+import * as plugins from './plugins.js';
+import type { IConnectionRecord, IPortProxySettings } from './classes.pp.interfaces.js';
+import { SecurityManager } from './classes.pp.securitymanager.js';
+import { TimeoutManager } from './classes.pp.timeoutmanager.js';
+
+/**
+ * Manages connection lifecycle, tracking, and cleanup
+ */
+export class ConnectionManager {
+  private connectionRecords: Map<string, IConnectionRecord> = new Map();
+  private terminationStats: {
+    incoming: Record<string, number>;
+    outgoing: Record<string, number>;
+  } = { incoming: {}, outgoing: {} };
+  
+  constructor(
+    private settings: IPortProxySettings,
+    private securityManager: SecurityManager,
+    private timeoutManager: TimeoutManager
+  ) {}
+  
+  /**
+   * Generate a unique connection ID
+   */
+  public generateConnectionId(): string {
+    return Math.random().toString(36).substring(2, 15) + 
+           Math.random().toString(36).substring(2, 15);
+  }
+  
+  /**
+   * Create and track a new connection
+   */
+  public createConnection(socket: plugins.net.Socket): IConnectionRecord {
+    const connectionId = this.generateConnectionId();
+    const remoteIP = socket.remoteAddress || '';
+    const localPort = socket.localPort || 0;
+
+    const record: IConnectionRecord = {
+      id: connectionId,
+      incoming: socket,
+      outgoing: null,
+      incomingStartTime: Date.now(),
+      lastActivity: Date.now(),
+      connectionClosed: false,
+      pendingData: [],
+      pendingDataSize: 0,
+      bytesReceived: 0,
+      bytesSent: 0,
+      remoteIP,
+      localPort,
+      isTLS: false,
+      tlsHandshakeComplete: false,
+      hasReceivedInitialData: false,
+      hasKeepAlive: false,
+      incomingTerminationReason: null,
+      outgoingTerminationReason: null,
+      usingNetworkProxy: false,
+      isBrowserConnection: false,
+      domainSwitches: 0
+    };
+    
+    this.trackConnection(connectionId, record);
+    return record;
+  }
+  
+  /**
+   * Track an existing connection
+   */
+  public trackConnection(connectionId: string, record: IConnectionRecord): void {
+    this.connectionRecords.set(connectionId, record);
+    this.securityManager.trackConnectionByIP(record.remoteIP, connectionId);
+  }
+  
+  /**
+   * Get a connection by ID
+   */
+  public getConnection(connectionId: string): IConnectionRecord | undefined {
+    return this.connectionRecords.get(connectionId);
+  }
+  
+  /**
+   * Get all active connections
+   */
+  public getConnections(): Map<string, IConnectionRecord> {
+    return this.connectionRecords;
+  }
+  
+  /**
+   * Get count of active connections
+   */
+  public getConnectionCount(): number {
+    return this.connectionRecords.size;
+  }
+  
+  /**
+   * Initiates cleanup once for a connection
+   */
+  public initiateCleanupOnce(record: IConnectionRecord, reason: string = 'normal'): void {
+    if (this.settings.enableDetailedLogging) {
+      console.log(`[${record.id}] Connection cleanup initiated for ${record.remoteIP} (${reason})`);
+    }
+
+    if (
+      record.incomingTerminationReason === null ||
+      record.incomingTerminationReason === undefined
+    ) {
+      record.incomingTerminationReason = reason;
+      this.incrementTerminationStat('incoming', reason);
+    }
+
+    this.cleanupConnection(record, reason);
+  }
+  
+  /**
+   * Clean up a connection record
+   */
+  public cleanupConnection(record: IConnectionRecord, reason: string = 'normal'): void {
+    if (!record.connectionClosed) {
+      record.connectionClosed = true;
+
+      // Track connection termination
+      this.securityManager.removeConnectionByIP(record.remoteIP, record.id);
+
+      if (record.cleanupTimer) {
+        clearTimeout(record.cleanupTimer);
+        record.cleanupTimer = undefined;
+      }
+
+      // Detailed logging data
+      const duration = Date.now() - record.incomingStartTime;
+      const bytesReceived = record.bytesReceived;
+      const bytesSent = record.bytesSent;
+
+      // Remove all data handlers to make sure we clean up properly
+      if (record.incoming) {
+        try {
+          // Remove our safe data handler
+          record.incoming.removeAllListeners('data');
+          // Reset the handler references
+          record.renegotiationHandler = undefined;
+        } catch (err) {
+          console.log(`[${record.id}] Error removing data handlers: ${err}`);
+        }
+      }
+
+      // Handle incoming socket
+      this.cleanupSocket(record, 'incoming', record.incoming);
+      
+      // Handle outgoing socket
+      if (record.outgoing) {
+        this.cleanupSocket(record, 'outgoing', record.outgoing);
+      }
+
+      // Clear pendingData to avoid memory leaks
+      record.pendingData = [];
+      record.pendingDataSize = 0;
+
+      // Remove the record from the tracking map
+      this.connectionRecords.delete(record.id);
+
+      // Log connection details
+      if (this.settings.enableDetailedLogging) {
+        console.log(
+          `[${record.id}] Connection from ${record.remoteIP} on port ${record.localPort} terminated (${reason}).` +
+            ` Duration: ${plugins.prettyMs(duration)}, Bytes IN: ${bytesReceived}, OUT: ${bytesSent}, ` +
+            `TLS: ${record.isTLS ? 'Yes' : 'No'}, Keep-Alive: ${record.hasKeepAlive ? 'Yes' : 'No'}` +
+            `${record.usingNetworkProxy ? ', Using NetworkProxy' : ''}` +
+            `${record.domainSwitches ? `, Domain switches: ${record.domainSwitches}` : ''}`
+        );
+      } else {
+        console.log(
+          `[${record.id}] Connection from ${record.remoteIP} terminated (${reason}). Active connections: ${this.connectionRecords.size}`
+        );
+      }
+    }
+  }
+  
+  /**
+   * Helper method to clean up a socket
+   */
+  private cleanupSocket(record: IConnectionRecord, side: 'incoming' | 'outgoing', socket: plugins.net.Socket): void {
+    try {
+      if (!socket.destroyed) {
+        // Try graceful shutdown first, then force destroy after a short timeout
+        socket.end();
+        const socketTimeout = setTimeout(() => {
+          try {
+            if (!socket.destroyed) {
+              socket.destroy();
+            }
+          } catch (err) {
+            console.log(`[${record.id}] Error destroying ${side} socket: ${err}`);
+          }
+        }, 1000);
+
+        // Ensure the timeout doesn't block Node from exiting
+        if (socketTimeout.unref) {
+          socketTimeout.unref();
+        }
+      }
+    } catch (err) {
+      console.log(`[${record.id}] Error closing ${side} socket: ${err}`);
+      try {
+        if (!socket.destroyed) {
+          socket.destroy();
+        }
+      } catch (destroyErr) {
+        console.log(`[${record.id}] Error destroying ${side} socket: ${destroyErr}`);
+      }
+    }
+  }
+  
+  /**
+   * Creates a generic error handler for incoming or outgoing sockets
+   */
+  public handleError(side: 'incoming' | 'outgoing', record: IConnectionRecord) {
+    return (err: Error) => {
+      const code = (err as any).code;
+      let reason = 'error';
+
+      const now = Date.now();
+      const connectionDuration = now - record.incomingStartTime;
+      const lastActivityAge = now - record.lastActivity;
+
+      if (code === 'ECONNRESET') {
+        reason = 'econnreset';
+        console.log(
+          `[${record.id}] ECONNRESET on ${side} side from ${record.remoteIP}: ${err.message}. ` +
+          `Duration: ${plugins.prettyMs(connectionDuration)}, Last activity: ${plugins.prettyMs(lastActivityAge)} ago`
+        );
+      } else if (code === 'ETIMEDOUT') {
+        reason = 'etimedout';
+        console.log(
+          `[${record.id}] ETIMEDOUT on ${side} side from ${record.remoteIP}: ${err.message}. ` +
+          `Duration: ${plugins.prettyMs(connectionDuration)}, Last activity: ${plugins.prettyMs(lastActivityAge)} ago`
+        );
+      } else {
+        console.log(
+          `[${record.id}] Error on ${side} side from ${record.remoteIP}: ${err.message}. ` +
+          `Duration: ${plugins.prettyMs(connectionDuration)}, Last activity: ${plugins.prettyMs(lastActivityAge)} ago`
+        );
+      }
+
+      if (side === 'incoming' && record.incomingTerminationReason === null) {
+        record.incomingTerminationReason = reason;
+        this.incrementTerminationStat('incoming', reason);
+      } else if (side === 'outgoing' && record.outgoingTerminationReason === null) {
+        record.outgoingTerminationReason = reason;
+        this.incrementTerminationStat('outgoing', reason);
+      }
+
+      this.initiateCleanupOnce(record, reason);
+    };
+  }
+  
+  /**
+   * Creates a generic close handler for incoming or outgoing sockets
+   */
+  public handleClose(side: 'incoming' | 'outgoing', record: IConnectionRecord) {
+    return () => {
+      if (this.settings.enableDetailedLogging) {
+        console.log(`[${record.id}] Connection closed on ${side} side from ${record.remoteIP}`);
+      }
+
+      if (side === 'incoming' && record.incomingTerminationReason === null) {
+        record.incomingTerminationReason = 'normal';
+        this.incrementTerminationStat('incoming', 'normal');
+      } else if (side === 'outgoing' && record.outgoingTerminationReason === null) {
+        record.outgoingTerminationReason = 'normal';
+        this.incrementTerminationStat('outgoing', 'normal');
+        // Record the time when outgoing socket closed.
+        record.outgoingClosedTime = Date.now();
+      }
+
+      this.initiateCleanupOnce(record, 'closed_' + side);
+    };
+  }
+  
+  /**
+   * Increment termination statistics
+   */
+  public incrementTerminationStat(side: 'incoming' | 'outgoing', reason: string): void {
+    this.terminationStats[side][reason] = (this.terminationStats[side][reason] || 0) + 1;
+  }
+  
+  /**
+   * Get termination statistics
+   */
+  public getTerminationStats(): { incoming: Record<string, number>; outgoing: Record<string, number> } {
+    return this.terminationStats;
+  }
+  
+  /**
+   * Check for stalled/inactive connections
+   */
+  public performInactivityCheck(): void {
+    const now = Date.now();
+    const connectionIds = [...this.connectionRecords.keys()];
+    
+    for (const id of connectionIds) {
+      const record = this.connectionRecords.get(id);
+      if (!record) continue;
+
+      // Skip inactivity check if disabled or for immortal keep-alive connections
+      if (
+        this.settings.disableInactivityCheck ||
+        (record.hasKeepAlive && this.settings.keepAliveTreatment === 'immortal')
+      ) {
+        continue;
+      }
+      
+      const inactivityTime = now - record.lastActivity;
+
+      // Use extended timeout for extended-treatment keep-alive connections
+      let effectiveTimeout = this.settings.inactivityTimeout!;
+      if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'extended') {
+        const multiplier = this.settings.keepAliveInactivityMultiplier || 6;
+        effectiveTimeout = effectiveTimeout * multiplier;
+      }
+
+      if (inactivityTime > effectiveTimeout && !record.connectionClosed) {
+        // For keep-alive connections, issue a warning first
+        if (record.hasKeepAlive && !record.inactivityWarningIssued) {
+          console.log(
+            `[${id}] Warning: Keep-alive connection from ${record.remoteIP} inactive for ${
+              plugins.prettyMs(inactivityTime)
+            }. Will close in 10 minutes if no activity.`
+          );
+
+          // Set warning flag and add grace period
+          record.inactivityWarningIssued = true;
+          record.lastActivity = now - (effectiveTimeout - 600000);
+
+          // Try to stimulate activity with a probe packet
+          if (record.outgoing && !record.outgoing.destroyed) {
+            try {
+              record.outgoing.write(Buffer.alloc(0));
+
+              if (this.settings.enableDetailedLogging) {
+                console.log(`[${id}] Sent probe packet to test keep-alive connection`);
+              }
+            } catch (err) {
+              console.log(`[${id}] Error sending probe packet: ${err}`);
+            }
+          }
+        } else {
+          // For non-keep-alive or after warning, close the connection
+          console.log(
+            `[${id}] Inactivity check: No activity on connection from ${record.remoteIP} ` +
+            `for ${plugins.prettyMs(inactivityTime)}.` +
+            (record.hasKeepAlive ? ' Despite keep-alive being enabled.' : '')
+          );
+          this.cleanupConnection(record, 'inactivity');
+        }
+      } else if (inactivityTime <= effectiveTimeout && record.inactivityWarningIssued) {
+        // If activity detected after warning, clear the warning
+        if (this.settings.enableDetailedLogging) {
+          console.log(
+            `[${id}] Connection activity detected after inactivity warning, resetting warning`
+          );
+        }
+        record.inactivityWarningIssued = false;
+      }
+      
+      // Parity check: if outgoing socket closed and incoming remains active
+      if (
+        record.outgoingClosedTime &&
+        !record.incoming.destroyed &&
+        !record.connectionClosed &&
+        now - record.outgoingClosedTime > 120000
+      ) {
+        console.log(
+          `[${id}] Parity check: Incoming socket for ${record.remoteIP} still active ${
+            plugins.prettyMs(now - record.outgoingClosedTime)
+          } after outgoing closed.`
+        );
+        this.cleanupConnection(record, 'parity_check');
+      }
+    }
+  }
+  
+  /**
+   * Clear all connections (for shutdown)
+   */
+  public clearConnections(): void {
+    // Create a copy of the keys to avoid modification during iteration
+    const connectionIds = [...this.connectionRecords.keys()];
+    
+    // First pass: End all connections gracefully
+    for (const id of connectionIds) {
+      const record = this.connectionRecords.get(id);
+      if (record) {
+        try {
+          // Clear any timers
+          if (record.cleanupTimer) {
+            clearTimeout(record.cleanupTimer);
+            record.cleanupTimer = undefined;
+          }
+
+          // End sockets gracefully
+          if (record.incoming && !record.incoming.destroyed) {
+            record.incoming.end();
+          }
+
+          if (record.outgoing && !record.outgoing.destroyed) {
+            record.outgoing.end();
+          }
+        } catch (err) {
+          console.log(`Error during graceful connection end for ${id}: ${err}`);
+        }
+      }
+    }
+
+    // Short delay to allow graceful ends to process
+    setTimeout(() => {
+      // Second pass: Force destroy everything
+      for (const id of connectionIds) {
+        const record = this.connectionRecords.get(id);
+        if (record) {
+          try {
+            // Remove all listeners to prevent memory leaks
+            if (record.incoming) {
+              record.incoming.removeAllListeners();
+              if (!record.incoming.destroyed) {
+                record.incoming.destroy();
+              }
+            }
+
+            if (record.outgoing) {
+              record.outgoing.removeAllListeners();
+              if (!record.outgoing.destroyed) {
+                record.outgoing.destroy();
+              }
+            }
+          } catch (err) {
+            console.log(`Error during forced connection destruction for ${id}: ${err}`);
+          }
+        }
+      }
+      
+      // Clear all maps
+      this.connectionRecords.clear();
+      this.terminationStats = { incoming: {}, outgoing: {} };
+    }, 100);
+  }
+}

ts/classes.pp.domainconfigmanager.ts

@@ -0,0 +1,123 @@
+import * as plugins from './plugins.js';
+import type { IDomainConfig, IPortProxySettings } from './classes.pp.interfaces.js';
+
+/**
+ * Manages domain configurations and target selection
+ */
+export class DomainConfigManager {
+  // Track round-robin indices for domain configs
+  private domainTargetIndices: Map<IDomainConfig, number> = new Map();
+  
+  constructor(private settings: IPortProxySettings) {}
+  
+  /**
+   * Updates the domain configurations
+   */
+  public updateDomainConfigs(newDomainConfigs: IDomainConfig[]): void {
+    this.settings.domainConfigs = newDomainConfigs;
+    
+    // Reset target indices for removed configs
+    const currentConfigSet = new Set(newDomainConfigs);
+    for (const [config] of this.domainTargetIndices) {
+      if (!currentConfigSet.has(config)) {
+        this.domainTargetIndices.delete(config);
+      }
+    }
+  }
+  
+  /**
+   * Get all domain configurations
+   */
+  public getDomainConfigs(): IDomainConfig[] {
+    return this.settings.domainConfigs;
+  }
+  
+  /**
+   * Find domain config matching a server name
+   */
+  public findDomainConfig(serverName: string): IDomainConfig | undefined {
+    if (!serverName) return undefined;
+    
+    return this.settings.domainConfigs.find((config) =>
+      config.domains.some((d) => plugins.minimatch(serverName, d))
+    );
+  }
+  
+  /**
+   * Find domain config for a specific port
+   */
+  public findDomainConfigForPort(port: number): IDomainConfig | undefined {
+    return this.settings.domainConfigs.find(
+      (domain) =>
+        domain.portRanges &&
+        domain.portRanges.length > 0 &&
+        this.isPortInRanges(port, domain.portRanges)
+    );
+  }
+  
+  /**
+   * Check if a port is within any of the given ranges
+   */
+  public isPortInRanges(port: number, ranges: Array<{ from: number; to: number }>): boolean {
+    return ranges.some((range) => port >= range.from && port <= range.to);
+  }
+  
+  /**
+   * Get target IP with round-robin support
+   */
+  public getTargetIP(domainConfig: IDomainConfig): string {
+    if (domainConfig.targetIPs && domainConfig.targetIPs.length > 0) {
+      const currentIndex = this.domainTargetIndices.get(domainConfig) || 0;
+      const ip = domainConfig.targetIPs[currentIndex % domainConfig.targetIPs.length];
+      this.domainTargetIndices.set(domainConfig, currentIndex + 1);
+      return ip;
+    }
+    
+    return this.settings.targetIP || 'localhost';
+  }
+  
+  /**
+   * Checks if a domain should use NetworkProxy
+   */
+  public shouldUseNetworkProxy(domainConfig: IDomainConfig): boolean {
+    return !!domainConfig.useNetworkProxy;
+  }
+  
+  /**
+   * Gets the NetworkProxy port for a domain
+   */
+  public getNetworkProxyPort(domainConfig: IDomainConfig): number | undefined {
+    return domainConfig.useNetworkProxy 
+      ? (domainConfig.networkProxyPort || this.settings.networkProxyPort)
+      : undefined;
+  }
+  
+  /**
+   * Get effective allowed and blocked IPs for a domain
+   */
+  public getEffectiveIPRules(domainConfig: IDomainConfig): {
+    allowedIPs: string[],
+    blockedIPs: string[]
+  } {
+    return {
+      allowedIPs: [
+        ...domainConfig.allowedIPs,
+        ...(this.settings.defaultAllowedIPs || [])
+      ],
+      blockedIPs: [
+        ...(domainConfig.blockedIPs || []),
+        ...(this.settings.defaultBlockedIPs || [])
+      ]
+    };
+  }
+  
+  /**
+   * Get connection timeout for a domain
+   */
+  public getConnectionTimeout(domainConfig?: IDomainConfig): number {
+    if (domainConfig?.connectionTimeout) {
+      return domainConfig.connectionTimeout;
+    }
+    return this.settings.maxConnectionLifetime || 86400000; // 24 hours default
+  }
+}

ts/classes.pp.interfaces.ts

@@ -0,0 +1,137 @@
+import * as plugins from './plugins.js';
+
+/** Domain configuration with per-domain allowed port ranges */
+export interface IDomainConfig {
+  domains: string[]; // Glob patterns for domain(s)
+  allowedIPs: string[]; // Glob patterns for allowed IPs
+  blockedIPs?: string[]; // Glob patterns for blocked IPs
+  targetIPs?: string[]; // If multiple targetIPs are given, use round robin.
+  portRanges?: Array<{ from: number; to: number }>; // Optional port ranges
+  // Allow domain-specific timeout override
+  connectionTimeout?: number; // Connection timeout override (ms)
+
+  // NetworkProxy integration options for this specific domain
+  useNetworkProxy?: boolean; // Whether to use NetworkProxy for this domain
+  networkProxyPort?: number; // Override default NetworkProxy port for this domain
+}
+
+/** Port proxy settings including global allowed port ranges */
+export interface IPortProxySettings {
+  fromPort: number;
+  toPort: number;
+  targetIP?: string; // Global target host to proxy to, defaults to 'localhost'
+  domainConfigs: IDomainConfig[];
+  sniEnabled?: boolean;
+  defaultAllowedIPs?: string[];
+  defaultBlockedIPs?: string[];
+  preserveSourceIP?: boolean;
+
+  // TLS options
+  pfx?: Buffer;
+  key?: string | Buffer | Array<Buffer | string>;
+  passphrase?: string;
+  cert?: string | Buffer | Array<string | Buffer>;
+  ca?: string | Buffer | Array<string | Buffer>;
+  ciphers?: string;
+  honorCipherOrder?: boolean;
+  rejectUnauthorized?: boolean;
+  secureProtocol?: string;
+  servername?: string;
+  minVersion?: string;
+  maxVersion?: string;
+
+  // Timeout settings
+  initialDataTimeout?: number; // Timeout for initial data/SNI (ms), default: 60000 (60s)
+  socketTimeout?: number; // Socket inactivity timeout (ms), default: 3600000 (1h)
+  inactivityCheckInterval?: number; // How often to check for inactive connections (ms), default: 60000 (60s)
+  maxConnectionLifetime?: number; // Default max connection lifetime (ms), default: 86400000 (24h)
+  inactivityTimeout?: number; // Inactivity timeout (ms), default: 14400000 (4h)
+
+  gracefulShutdownTimeout?: number; // (ms) maximum time to wait for connections to close during shutdown
+  globalPortRanges: Array<{ from: number; to: number }>; // Global allowed port ranges
+  forwardAllGlobalRanges?: boolean; // When true, forwards all connections on global port ranges to the global targetIP
+
+  // Socket optimization settings
+  noDelay?: boolean; // Disable Nagle's algorithm (default: true)
+  keepAlive?: boolean; // Enable TCP keepalive (default: true)
+  keepAliveInitialDelay?: number; // Initial delay before sending keepalive probes (ms)
+  maxPendingDataSize?: number; // Maximum bytes to buffer during connection setup
+
+  // Enhanced features
+  disableInactivityCheck?: boolean; // Disable inactivity checking entirely
+  enableKeepAliveProbes?: boolean; // Enable TCP keep-alive probes
+  enableDetailedLogging?: boolean; // Enable detailed connection logging
+  enableTlsDebugLogging?: boolean; // Enable TLS handshake debug logging
+  enableRandomizedTimeouts?: boolean; // Randomize timeouts slightly to prevent thundering herd
+  allowSessionTicket?: boolean; // Allow TLS session ticket for reconnection (default: true)
+
+  // Rate limiting and security
+  maxConnectionsPerIP?: number; // Maximum simultaneous connections from a single IP
+  connectionRateLimitPerMinute?: number; // Max new connections per minute from a single IP
+
+  // Enhanced keep-alive settings
+  keepAliveTreatment?: 'standard' | 'extended' | 'immortal'; // How to treat keep-alive connections
+  keepAliveInactivityMultiplier?: number; // Multiplier for inactivity timeout for keep-alive connections
+  extendedKeepAliveLifetime?: number; // Extended lifetime for keep-alive connections (ms)
+
+  // NetworkProxy integration
+  useNetworkProxy?: number[]; // Array of ports to forward to NetworkProxy
+  networkProxyPort?: number; // Port where NetworkProxy is listening (default: 8443)
+
+  // ACME certificate management options
+  acme?: {
+    enabled?: boolean; // Whether to enable automatic certificate management
+    port?: number; // Port to listen on for ACME challenges (default: 80)
+    contactEmail?: string; // Email for Let's Encrypt account
+    useProduction?: boolean; // Whether to use Let's Encrypt production (default: false for staging)
+    renewThresholdDays?: number; // Days before expiry to renew certificates (default: 30)
+    autoRenew?: boolean; // Whether to automatically renew certificates (default: true)
+    certificateStore?: string; // Directory to store certificates (default: ./certs)
+    skipConfiguredCerts?: boolean; // Skip domains that already have certificates configured
+  };
+}
+
+/**
+ * Enhanced connection record
+ */
+export interface IConnectionRecord {
+  id: string; // Unique connection identifier
+  incoming: plugins.net.Socket;
+  outgoing: plugins.net.Socket | null;
+  incomingStartTime: number;
+  outgoingStartTime?: number;
+  outgoingClosedTime?: number;
+  lockedDomain?: string; // Used to lock this connection to the initial SNI
+  connectionClosed: boolean; // Flag to prevent multiple cleanup attempts
+  cleanupTimer?: NodeJS.Timeout; // Timer for max lifetime/inactivity
+  alertFallbackTimeout?: NodeJS.Timeout; // Timer for fallback after alert
+  lastActivity: number; // Last activity timestamp for inactivity detection
+  pendingData: Buffer[]; // Buffer to hold data during connection setup
+  pendingDataSize: number; // Track total size of pending data
+
+  // Enhanced tracking fields
+  bytesReceived: number; // Total bytes received
+  bytesSent: number; // Total bytes sent
+  remoteIP: string; // Remote IP (cached for logging after socket close)
+  localPort: number; // Local port (cached for logging)
+  isTLS: boolean; // Whether this connection is a TLS connection
+  tlsHandshakeComplete: boolean; // Whether the TLS handshake is complete
+  hasReceivedInitialData: boolean; // Whether initial data has been received
+  domainConfig?: IDomainConfig; // Associated domain config for this connection
+
+  // Keep-alive tracking
+  hasKeepAlive: boolean; // Whether keep-alive is enabled for this connection
+  inactivityWarningIssued?: boolean; // Whether an inactivity warning has been issued
+  incomingTerminationReason?: string | null; // Reason for incoming termination
+  outgoingTerminationReason?: string | null; // Reason for outgoing termination
+
+  // NetworkProxy tracking
+  usingNetworkProxy?: boolean; // Whether this connection is using a NetworkProxy
+
+  // Renegotiation handler
+  renegotiationHandler?: (chunk: Buffer) => void; // Handler for renegotiation detection
+
+  // Browser connection tracking
+  isBrowserConnection?: boolean; // Whether this connection appears to be from a browser
+  domainSwitches?: number; // Number of times the domain has been switched on this connection
+}

ts/classes.pp.networkproxybridge.ts

@@ -0,0 +1,258 @@
+import * as plugins from './plugins.js';
+import { NetworkProxy } from './classes.networkproxy.js';
+import type { IConnectionRecord, IPortProxySettings, IDomainConfig } from './classes.pp.interfaces.js';
+
+/**
+ * Manages NetworkProxy integration for TLS termination
+ */
+export class NetworkProxyBridge {
+  private networkProxy: NetworkProxy | null = null;
+  
+  constructor(private settings: IPortProxySettings) {}
+  
+  /**
+   * Initialize NetworkProxy instance
+   */
+  public async initialize(): Promise<void> {
+    if (!this.networkProxy && this.settings.useNetworkProxy && this.settings.useNetworkProxy.length > 0) {
+      // Configure NetworkProxy options based on PortProxy settings
+      const networkProxyOptions: any = {
+        port: this.settings.networkProxyPort!,
+        portProxyIntegration: true,
+        logLevel: this.settings.enableDetailedLogging ? 'debug' : 'info',
+      };
+
+      // Add ACME settings if configured
+      if (this.settings.acme) {
+        networkProxyOptions.acme = { ...this.settings.acme };
+      }
+
+      this.networkProxy = new NetworkProxy(networkProxyOptions);
+
+      console.log(`Initialized NetworkProxy on port ${this.settings.networkProxyPort}`);
+
+      // Convert and apply domain configurations to NetworkProxy
+      await this.syncDomainConfigsToNetworkProxy();
+    }
+  }
+  
+  /**
+   * Get the NetworkProxy instance
+   */
+  public getNetworkProxy(): NetworkProxy | null {
+    return this.networkProxy;
+  }
+  
+  /**
+   * Get the NetworkProxy port
+   */
+  public getNetworkProxyPort(): number {
+    return this.networkProxy ? this.networkProxy.getListeningPort() : this.settings.networkProxyPort || 8443;
+  }
+  
+  /**
+   * Start NetworkProxy
+   */
+  public async start(): Promise<void> {
+    if (this.networkProxy) {
+      await this.networkProxy.start();
+      console.log(`NetworkProxy started on port ${this.settings.networkProxyPort}`);
+
+      // Log ACME status
+      if (this.settings.acme?.enabled) {
+        console.log(
+          `ACME certificate management is enabled (${
+            this.settings.acme.useProduction ? 'Production' : 'Staging'
+          } mode)`
+        );
+        console.log(`ACME HTTP challenge server on port ${this.settings.acme.port}`);
+
+        // Register domains for ACME certificates if enabled
+        if (this.networkProxy.options.acme?.enabled) {
+          console.log('Registering domains with ACME certificate manager...');
+          // The NetworkProxy will handle this internally via registerDomainsWithAcmeManager()
+        }
+      }
+    }
+  }
+  
+  /**
+   * Stop NetworkProxy
+   */
+  public async stop(): Promise<void> {
+    if (this.networkProxy) {
+      try {
+        console.log('Stopping NetworkProxy...');
+        await this.networkProxy.stop();
+        console.log('NetworkProxy stopped successfully');
+
+        // Log ACME shutdown if it was enabled
+        if (this.settings.acme?.enabled) {
+          console.log('ACME certificate manager stopped');
+        }
+      } catch (err) {
+        console.log(`Error stopping NetworkProxy: ${err}`);
+      }
+    }
+  }
+  
+  /**
+   * Forwards a TLS connection to a NetworkProxy for handling
+   */
+  public forwardToNetworkProxy(
+    connectionId: string,
+    socket: plugins.net.Socket,
+    record: IConnectionRecord,
+    initialData: Buffer,
+    customProxyPort?: number,
+    onError?: (reason: string) => void
+  ): void {
+    // Ensure NetworkProxy is initialized
+    if (!this.networkProxy) {
+      console.log(
+        `[${connectionId}] NetworkProxy not initialized. Cannot forward connection.`
+      );
+      if (onError) {
+        onError('network_proxy_not_initialized');
+      }
+      return;
+    }
+
+    // Use the custom port if provided, otherwise use the default NetworkProxy port
+    const proxyPort = customProxyPort || this.networkProxy.getListeningPort();
+    const proxyHost = 'localhost'; // Assuming NetworkProxy runs locally
+
+    if (this.settings.enableDetailedLogging) {
+      console.log(
+        `[${connectionId}] Forwarding TLS connection to NetworkProxy at ${proxyHost}:${proxyPort}`
+      );
+    }
+
+    // Create a connection to the NetworkProxy
+    const proxySocket = plugins.net.connect({
+      host: proxyHost,
+      port: proxyPort,
+    });
+
+    // Store the outgoing socket in the record
+    record.outgoing = proxySocket;
+    record.outgoingStartTime = Date.now();
+    record.usingNetworkProxy = true;
+
+    // Set up error handlers
+    proxySocket.on('error', (err) => {
+      console.log(`[${connectionId}] Error connecting to NetworkProxy: ${err.message}`);
+      if (onError) {
+        onError('network_proxy_connect_error');
+      }
+    });
+
+    // Handle connection to NetworkProxy
+    proxySocket.on('connect', () => {
+      if (this.settings.enableDetailedLogging) {
+        console.log(`[${connectionId}] Connected to NetworkProxy at ${proxyHost}:${proxyPort}`);
+      }
+
+      // First send the initial data that contains the TLS ClientHello
+      proxySocket.write(initialData);
+
+      // Now set up bidirectional piping between client and NetworkProxy
+      socket.pipe(proxySocket);
+      proxySocket.pipe(socket);
+
+      // Update activity on data transfer (caller should handle this)
+      if (this.settings.enableDetailedLogging) {
+        console.log(`[${connectionId}] TLS connection successfully forwarded to NetworkProxy`);
+      }
+    });
+  }
+  
+  /**
+   * Synchronizes domain configurations to NetworkProxy
+   */
+  public async syncDomainConfigsToNetworkProxy(): Promise<void> {
+    if (!this.networkProxy) {
+      console.log('Cannot sync configurations - NetworkProxy not initialized');
+      return;
+    }
+
+    try {
+      // Get SSL certificates from assets
+      // Import fs directly since it's not in plugins
+      const fs = await import('fs');
+
+      let certPair;
+      try {
+        certPair = {
+          key: fs.readFileSync('assets/certs/key.pem', 'utf8'),
+          cert: fs.readFileSync('assets/certs/cert.pem', 'utf8'),
+        };
+      } catch (certError) {
+        console.log(`Warning: Could not read default certificates: ${certError}`);
+        console.log(
+          'Using empty certificate placeholders - ACME will generate proper certificates if enabled'
+        );
+
+        // Use empty placeholders - NetworkProxy will use its internal defaults
+        // or ACME will generate proper ones if enabled
+        certPair = {
+          key: '',
+          cert: '',
+        };
+      }
+
+      // Convert domain configs to NetworkProxy configs
+      const proxyConfigs = this.networkProxy.convertPortProxyConfigs(
+        this.settings.domainConfigs,
+        certPair
+      );
+
+      // Log ACME-eligible domains if ACME is enabled
+      if (this.settings.acme?.enabled) {
+        const acmeEligibleDomains = proxyConfigs
+          .filter((config) => !config.hostName.includes('*')) // Exclude wildcards
+          .map((config) => config.hostName);
+
+        if (acmeEligibleDomains.length > 0) {
+          console.log(`Domains eligible for ACME certificates: ${acmeEligibleDomains.join(', ')}`);
+        } else {
+          console.log('No domains eligible for ACME certificates found in configuration');
+        }
+      }
+
+      // Update NetworkProxy with the converted configs
+      await this.networkProxy.updateProxyConfigs(proxyConfigs);
+      console.log(`Successfully synchronized ${proxyConfigs.length} domain configurations to NetworkProxy`);
+    } catch (err) {
+      console.log(`Failed to sync configurations: ${err}`);
+    }
+  }
+  
+  /**
+   * Request a certificate for a specific domain
+   */
+  public async requestCertificate(domain: string): Promise<boolean> {
+    if (!this.networkProxy) {
+      console.log('Cannot request certificate - NetworkProxy not initialized');
+      return false;
+    }
+
+    if (!this.settings.acme?.enabled) {
+      console.log('Cannot request certificate - ACME is not enabled');
+      return false;
+    }
+
+    try {
+      const result = await this.networkProxy.requestCertificate(domain);
+      if (result) {
+        console.log(`Certificate request for ${domain} submitted successfully`);
+      } else {
+        console.log(`Certificate request for ${domain} failed`);
+      }
+      return result;
+    } catch (err) {
+      console.log(`Error requesting certificate: ${err}`);
+      return false;
+    }
+  }
+}

ts/classes.pp.portproxy.ts

@@ -0,0 +1,344 @@
+import * as plugins from './plugins.js';
+import type { IPortProxySettings, IDomainConfig } from './classes.pp.interfaces.js';
+import { ConnectionManager } from './classes.pp.connectionmanager.js';
+import { SecurityManager } from './classes.pp.securitymanager.js';
+import { DomainConfigManager } from './classes.pp.domainconfigmanager.js';
+import { TlsManager } from './classes.pp.tlsmanager.js';
+import { NetworkProxyBridge } from './classes.pp.networkproxybridge.js';
+import { TimeoutManager } from './classes.pp.timeoutmanager.js';
+import { AcmeManager } from './classes.pp.acmemanager.js';
+import { PortRangeManager } from './classes.pp.portrangemanager.js';
+import { ConnectionHandler } from './classes.pp.connectionhandler.js';
+
+/**
+ * PortProxy - Main class that coordinates all components
+ */
+export class PortProxy {
+  private netServers: plugins.net.Server[] = [];
+  private connectionLogger: NodeJS.Timeout | null = null;
+  private isShuttingDown: boolean = false;
+  
+  // Component managers
+  private connectionManager: ConnectionManager;
+  private securityManager: SecurityManager;
+  public domainConfigManager: DomainConfigManager;
+  private tlsManager: TlsManager;
+  private networkProxyBridge: NetworkProxyBridge;
+  private timeoutManager: TimeoutManager;
+  private acmeManager: AcmeManager;
+  private portRangeManager: PortRangeManager;
+  private connectionHandler: ConnectionHandler;
+  
+  constructor(settingsArg: IPortProxySettings) {
+    // Set reasonable defaults for all settings
+    this.settings = {
+      ...settingsArg,
+      targetIP: settingsArg.targetIP || 'localhost',
+      initialDataTimeout: settingsArg.initialDataTimeout || 120000,
+      socketTimeout: settingsArg.socketTimeout || 3600000,
+      inactivityCheckInterval: settingsArg.inactivityCheckInterval || 60000,
+      maxConnectionLifetime: settingsArg.maxConnectionLifetime || 86400000,
+      inactivityTimeout: settingsArg.inactivityTimeout || 14400000,
+      gracefulShutdownTimeout: settingsArg.gracefulShutdownTimeout || 30000,
+      noDelay: settingsArg.noDelay !== undefined ? settingsArg.noDelay : true,
+      keepAlive: settingsArg.keepAlive !== undefined ? settingsArg.keepAlive : true,
+      keepAliveInitialDelay: settingsArg.keepAliveInitialDelay || 10000,
+      maxPendingDataSize: settingsArg.maxPendingDataSize || 10 * 1024 * 1024,
+      disableInactivityCheck: settingsArg.disableInactivityCheck || false,
+      enableKeepAliveProbes: 
+        settingsArg.enableKeepAliveProbes !== undefined ? settingsArg.enableKeepAliveProbes : true,
+      enableDetailedLogging: settingsArg.enableDetailedLogging || false,
+      enableTlsDebugLogging: settingsArg.enableTlsDebugLogging || false,
+      enableRandomizedTimeouts: settingsArg.enableRandomizedTimeouts || false,
+      allowSessionTicket: 
+        settingsArg.allowSessionTicket !== undefined ? settingsArg.allowSessionTicket : true,
+      maxConnectionsPerIP: settingsArg.maxConnectionsPerIP || 100,
+      connectionRateLimitPerMinute: settingsArg.connectionRateLimitPerMinute || 300,
+      keepAliveTreatment: settingsArg.keepAliveTreatment || 'extended',
+      keepAliveInactivityMultiplier: settingsArg.keepAliveInactivityMultiplier || 6,
+      extendedKeepAliveLifetime: settingsArg.extendedKeepAliveLifetime || 7 * 24 * 60 * 60 * 1000,
+      networkProxyPort: settingsArg.networkProxyPort || 8443,
+      acme: settingsArg.acme || {
+        enabled: false,
+        port: 80,
+        contactEmail: 'admin@example.com',
+        useProduction: false,
+        renewThresholdDays: 30,
+        autoRenew: true,
+        certificateStore: './certs',
+        skipConfiguredCerts: false,
+      },
+    };
+    
+    // Initialize component managers
+    this.timeoutManager = new TimeoutManager(this.settings);
+    this.securityManager = new SecurityManager(this.settings);
+    this.connectionManager = new ConnectionManager(
+      this.settings, 
+      this.securityManager, 
+      this.timeoutManager
+    );
+    this.domainConfigManager = new DomainConfigManager(this.settings);
+    this.tlsManager = new TlsManager(this.settings);
+    this.networkProxyBridge = new NetworkProxyBridge(this.settings);
+    this.portRangeManager = new PortRangeManager(this.settings);
+    this.acmeManager = new AcmeManager(this.settings, this.networkProxyBridge);
+    
+    // Initialize connection handler
+    this.connectionHandler = new ConnectionHandler(
+      this.settings,
+      this.connectionManager,
+      this.securityManager,
+      this.domainConfigManager,
+      this.tlsManager,
+      this.networkProxyBridge,
+      this.timeoutManager,
+      this.portRangeManager
+    );
+  }
+  
+  /**
+   * The settings for the port proxy
+   */
+  public settings: IPortProxySettings;
+  
+  /**
+   * Start the proxy server
+   */
+  public async start() {
+    // Don't start if already shutting down
+    if (this.isShuttingDown) {
+      console.log("Cannot start PortProxy while it's shutting down");
+      return;
+    }
+
+    // Initialize and start NetworkProxy if needed
+    if (
+      this.settings.useNetworkProxy &&
+      this.settings.useNetworkProxy.length > 0
+    ) {
+      await this.networkProxyBridge.initialize();
+      await this.networkProxyBridge.start();
+    }
+
+    // Validate port configuration
+    const configWarnings = this.portRangeManager.validateConfiguration();
+    if (configWarnings.length > 0) {
+      console.log("Port configuration warnings:");
+      for (const warning of configWarnings) {
+        console.log(` - ${warning}`);
+      }
+    }
+
+    // Get listening ports from PortRangeManager
+    const listeningPorts = this.portRangeManager.getListeningPorts();
+
+    // Create servers for each port
+    for (const port of listeningPorts) {
+      const server = plugins.net.createServer((socket) => {
+        // Check if shutting down
+        if (this.isShuttingDown) {
+          socket.end();
+          socket.destroy();
+          return;
+        }
+        
+        // Delegate to connection handler
+        this.connectionHandler.handleConnection(socket);
+      }).on('error', (err: Error) => {
+        console.log(`Server Error on port ${port}: ${err.message}`);
+      });
+      
+      server.listen(port, () => {
+        const isNetworkProxyPort = this.settings.useNetworkProxy?.includes(port);
+        console.log(
+          `PortProxy -> OK: Now listening on port ${port}${
+            this.settings.sniEnabled && !isNetworkProxyPort ? ' (SNI passthrough enabled)' : ''
+          }${isNetworkProxyPort ? ' (NetworkProxy forwarding enabled)' : ''}`
+        );
+      });
+      
+      this.netServers.push(server);
+    }
+
+    // Set up periodic connection logging and inactivity checks
+    this.connectionLogger = setInterval(() => {
+      // Immediately return if shutting down
+      if (this.isShuttingDown) return;
+
+      // Perform inactivity check
+      this.connectionManager.performInactivityCheck();
+
+      // Log connection statistics
+      const now = Date.now();
+      let maxIncoming = 0;
+      let maxOutgoing = 0;
+      let tlsConnections = 0;
+      let nonTlsConnections = 0;
+      let completedTlsHandshakes = 0;
+      let pendingTlsHandshakes = 0;
+      let keepAliveConnections = 0;
+      let networkProxyConnections = 0;
+      
+      // Get connection records for analysis
+      const connectionRecords = this.connectionManager.getConnections();
+      
+      // Analyze active connections
+      for (const record of connectionRecords.values()) {
+        // Track connection stats
+        if (record.isTLS) {
+          tlsConnections++;
+          if (record.tlsHandshakeComplete) {
+            completedTlsHandshakes++;
+          } else {
+            pendingTlsHandshakes++;
+          }
+        } else {
+          nonTlsConnections++;
+        }
+
+        if (record.hasKeepAlive) {
+          keepAliveConnections++;
+        }
+
+        if (record.usingNetworkProxy) {
+          networkProxyConnections++;
+        }
+
+        maxIncoming = Math.max(maxIncoming, now - record.incomingStartTime);
+        if (record.outgoingStartTime) {
+          maxOutgoing = Math.max(maxOutgoing, now - record.outgoingStartTime);
+        }
+      }
+
+      // Get termination stats
+      const terminationStats = this.connectionManager.getTerminationStats();
+
+      // Log detailed stats
+      console.log(
+        `Active connections: ${connectionRecords.size}. ` +
+        `Types: TLS=${tlsConnections} (Completed=${completedTlsHandshakes}, Pending=${pendingTlsHandshakes}), ` +
+        `Non-TLS=${nonTlsConnections}, KeepAlive=${keepAliveConnections}, NetworkProxy=${networkProxyConnections}. ` +
+        `Longest running: IN=${plugins.prettyMs(maxIncoming)}, OUT=${plugins.prettyMs(maxOutgoing)}. ` +
+        `Termination stats: ${JSON.stringify({
+          IN: terminationStats.incoming,
+          OUT: terminationStats.outgoing,
+        })}`
+      );
+    }, this.settings.inactivityCheckInterval || 60000);
+
+    // Make sure the interval doesn't keep the process alive
+    if (this.connectionLogger.unref) {
+      this.connectionLogger.unref();
+    }
+  }
+  
+  /**
+   * Stop the proxy server
+   */
+  public async stop() {
+    console.log('PortProxy shutting down...');
+    this.isShuttingDown = true;
+
+    // Stop accepting new connections
+    const closeServerPromises: Promise<void>[] = this.netServers.map(
+      (server) =>
+        new Promise<void>((resolve) => {
+          if (!server.listening) {
+            resolve();
+            return;
+          }
+          server.close((err) => {
+            if (err) {
+              console.log(`Error closing server: ${err.message}`);
+            }
+            resolve();
+          });
+        })
+    );
+
+    // Stop the connection logger
+    if (this.connectionLogger) {
+      clearInterval(this.connectionLogger);
+      this.connectionLogger = null;
+    }
+
+    // Wait for servers to close
+    await Promise.all(closeServerPromises);
+    console.log('All servers closed. Cleaning up active connections...');
+
+    // Clean up all active connections
+    this.connectionManager.clearConnections();
+
+    // Stop NetworkProxy
+    await this.networkProxyBridge.stop();
+
+    // Clear all servers
+    this.netServers = [];
+
+    console.log('PortProxy shutdown complete.');
+  }
+  
+  /**
+   * Updates the domain configurations for the proxy
+   */
+  public async updateDomainConfigs(newDomainConfigs: IDomainConfig[]): Promise<void> {
+    console.log(`Updating domain configurations (${newDomainConfigs.length} configs)`);
+    
+    // Update domain configs in DomainConfigManager
+    this.domainConfigManager.updateDomainConfigs(newDomainConfigs);
+    
+    // If NetworkProxy is initialized, resync the configurations
+    if (this.networkProxyBridge.getNetworkProxy()) {
+      await this.networkProxyBridge.syncDomainConfigsToNetworkProxy();
+    }
+  }
+  
+  /**
+   * Updates the ACME certificate settings
+   */
+  public async updateAcmeSettings(acmeSettings: IPortProxySettings['acme']): Promise<void> {
+    console.log('Updating ACME certificate settings');
+    
+    // Delegate to AcmeManager
+    await this.acmeManager.updateAcmeSettings(acmeSettings);
+  }
+  
+  /**
+   * Requests a certificate for a specific domain
+   */
+  public async requestCertificate(domain: string): Promise<boolean> {
+    // Delegate to AcmeManager
+    return this.acmeManager.requestCertificate(domain);
+  }
+  
+  /**
+   * Get statistics about current connections
+   */
+  public getStatistics(): any {
+    const connectionRecords = this.connectionManager.getConnections();
+    const terminationStats = this.connectionManager.getTerminationStats();
+    
+    let tlsConnections = 0;
+    let nonTlsConnections = 0;
+    let keepAliveConnections = 0;
+    let networkProxyConnections = 0;
+    
+    // Analyze active connections
+    for (const record of connectionRecords.values()) {
+      if (record.isTLS) tlsConnections++;
+      else nonTlsConnections++;
+      if (record.hasKeepAlive) keepAliveConnections++;
+      if (record.usingNetworkProxy) networkProxyConnections++;
+    }
+    
+    return {
+      activeConnections: connectionRecords.size,
+      tlsConnections,
+      nonTlsConnections,
+      keepAliveConnections,
+      networkProxyConnections,
+      terminationStats
+    };
+  }
+}

ts/classes.pp.portrangemanager.ts

@@ -0,0 +1,214 @@
+import type{ IPortProxySettings } from './classes.pp.interfaces.js';
+
+/**
+ * Manages port ranges and port-based configuration
+ */
+export class PortRangeManager {
+  constructor(private settings: IPortProxySettings) {}
+  
+  /**
+   * Get all ports that should be listened on
+   */
+  public getListeningPorts(): Set<number> {
+    const listeningPorts = new Set<number>();
+    
+    // Always include the main fromPort
+    listeningPorts.add(this.settings.fromPort);
+    
+    // Add ports from global port ranges if defined
+    if (this.settings.globalPortRanges && this.settings.globalPortRanges.length > 0) {
+      for (const range of this.settings.globalPortRanges) {
+        for (let port = range.from; port <= range.to; port++) {
+          listeningPorts.add(port);
+        }
+      }
+    }
+    
+    return listeningPorts;
+  }
+  
+  /**
+   * Check if a port should use NetworkProxy for forwarding
+   */
+  public shouldUseNetworkProxy(port: number): boolean {
+    return !!this.settings.useNetworkProxy && this.settings.useNetworkProxy.includes(port);
+  }
+  
+  /**
+   * Check if port should use global forwarding
+   */
+  public shouldUseGlobalForwarding(port: number): boolean {
+    return (
+      !!this.settings.forwardAllGlobalRanges &&
+      this.isPortInGlobalRanges(port)
+    );
+  }
+  
+  /**
+   * Check if a port is in global ranges
+   */
+  public isPortInGlobalRanges(port: number): boolean {
+    return (
+      this.settings.globalPortRanges &&
+      this.isPortInRanges(port, this.settings.globalPortRanges)
+    );
+  }
+  
+  /**
+   * Check if a port falls within the specified ranges
+   */
+  public isPortInRanges(port: number, ranges: Array<{ from: number; to: number }>): boolean {
+    return ranges.some((range) => port >= range.from && port <= range.to);
+  }
+  
+  /**
+   * Get forwarding port for a specific listening port
+   * This determines what port to connect to on the target
+   */
+  public getForwardingPort(listeningPort: number): number {
+    // If using global forwarding, forward to the original port
+    if (this.settings.forwardAllGlobalRanges && this.isPortInGlobalRanges(listeningPort)) {
+      return listeningPort;
+    }
+    
+    // Otherwise use the configured toPort
+    return this.settings.toPort;
+  }
+  
+  /**
+   * Find domain-specific port ranges that include a given port
+   */
+  public findDomainPortRange(port: number): { 
+    domainIndex: number, 
+    range: { from: number, to: number } 
+  } | undefined {
+    for (let i = 0; i < this.settings.domainConfigs.length; i++) {
+      const domain = this.settings.domainConfigs[i];
+      if (domain.portRanges) {
+        for (const range of domain.portRanges) {
+          if (port >= range.from && port <= range.to) {
+            return { domainIndex: i, range };
+          }
+        }
+      }
+    }
+    return undefined;
+  }
+  
+  /**
+   * Get a list of all configured ports
+   * This includes the fromPort, NetworkProxy ports, and ports from all ranges
+   */
+  public getAllConfiguredPorts(): number[] {
+    const ports = new Set<number>();
+    
+    // Add main listening port
+    ports.add(this.settings.fromPort);
+    
+    // Add NetworkProxy port if configured
+    if (this.settings.networkProxyPort) {
+      ports.add(this.settings.networkProxyPort);
+    }
+    
+    // Add NetworkProxy ports
+    if (this.settings.useNetworkProxy) {
+      for (const port of this.settings.useNetworkProxy) {
+        ports.add(port);
+      }
+    }
+    
+    // Add ACME HTTP challenge port if enabled
+    if (this.settings.acme?.enabled && this.settings.acme.port) {
+      ports.add(this.settings.acme.port);
+    }
+    
+    // Add global port ranges
+    if (this.settings.globalPortRanges) {
+      for (const range of this.settings.globalPortRanges) {
+        for (let port = range.from; port <= range.to; port++) {
+          ports.add(port);
+        }
+      }
+    }
+    
+    // Add domain-specific port ranges
+    for (const domain of this.settings.domainConfigs) {
+      if (domain.portRanges) {
+        for (const range of domain.portRanges) {
+          for (let port = range.from; port <= range.to; port++) {
+            ports.add(port);
+          }
+        }
+      }
+      
+      // Add domain-specific NetworkProxy port if configured
+      if (domain.useNetworkProxy && domain.networkProxyPort) {
+        ports.add(domain.networkProxyPort);
+      }
+    }
+    
+    return Array.from(ports);
+  }
+  
+  /**
+   * Validate port configuration
+   * Returns array of warning messages
+   */
+  public validateConfiguration(): string[] {
+    const warnings: string[] = [];
+    
+    // Check for overlapping port ranges
+    const portMappings = new Map<number, string[]>();
+    
+    // Track global port ranges
+    if (this.settings.globalPortRanges) {
+      for (const range of this.settings.globalPortRanges) {
+        for (let port = range.from; port <= range.to; port++) {
+          if (!portMappings.has(port)) {
+            portMappings.set(port, []);
+          }
+          portMappings.get(port)!.push('Global Port Range');
+        }
+      }
+    }
+    
+    // Track domain-specific port ranges
+    for (const domain of this.settings.domainConfigs) {
+      if (domain.portRanges) {
+        for (const range of domain.portRanges) {
+          for (let port = range.from; port <= range.to; port++) {
+            if (!portMappings.has(port)) {
+              portMappings.set(port, []);
+            }
+            portMappings.get(port)!.push(`Domain: ${domain.domains.join(', ')}`);
+          }
+        }
+      }
+    }
+    
+    // Check for ports with multiple mappings
+    for (const [port, mappings] of portMappings.entries()) {
+      if (mappings.length > 1) {
+        warnings.push(`Port ${port} has multiple mappings: ${mappings.join(', ')}`);
+      }
+    }
+    
+    // Check if main ports are used elsewhere
+    if (portMappings.has(this.settings.fromPort) && portMappings.get(this.settings.fromPort)!.length > 0) {
+      warnings.push(`Main listening port ${this.settings.fromPort} is also used in port ranges`);
+    }
+    
+    if (this.settings.networkProxyPort && portMappings.has(this.settings.networkProxyPort)) {
+      warnings.push(`NetworkProxy port ${this.settings.networkProxyPort} is also used in port ranges`);
+    }
+    
+    // Check ACME port
+    if (this.settings.acme?.enabled && this.settings.acme.port) {
+      if (portMappings.has(this.settings.acme.port)) {
+        warnings.push(`ACME HTTP challenge port ${this.settings.acme.port} is also used in port ranges`);
+      }
+    }
+    
+    return warnings;
+  }
+}

ts/classes.pp.securitymanager.ts

@@ -0,0 +1,147 @@
+import * as plugins from './plugins.js';
+import type { IPortProxySettings } from './classes.pp.interfaces.js';
+
+/**
+ * Handles security aspects like IP tracking, rate limiting, and authorization
+ */
+export class SecurityManager {
+  private connectionsByIP: Map<string, Set<string>> = new Map();
+  private connectionRateByIP: Map<string, number[]> = new Map();
+  
+  constructor(private settings: IPortProxySettings) {}
+  
+  /**
+   * Get connections count by IP
+   */
+  public getConnectionCountByIP(ip: string): number {
+    return this.connectionsByIP.get(ip)?.size || 0;
+  }
+  
+  /**
+   * Check and update connection rate for an IP
+   * @returns true if within rate limit, false if exceeding limit
+   */
+  public checkConnectionRate(ip: string): boolean {
+    const now = Date.now();
+    const minute = 60 * 1000;
+
+    if (!this.connectionRateByIP.has(ip)) {
+      this.connectionRateByIP.set(ip, [now]);
+      return true;
+    }
+
+    // Get timestamps and filter out entries older than 1 minute
+    const timestamps = this.connectionRateByIP.get(ip)!.filter((time) => now - time < minute);
+    timestamps.push(now);
+    this.connectionRateByIP.set(ip, timestamps);
+
+    // Check if rate exceeds limit
+    return timestamps.length <= this.settings.connectionRateLimitPerMinute!;
+  }
+  
+  /**
+   * Track connection by IP
+   */
+  public trackConnectionByIP(ip: string, connectionId: string): void {
+    if (!this.connectionsByIP.has(ip)) {
+      this.connectionsByIP.set(ip, new Set());
+    }
+    this.connectionsByIP.get(ip)!.add(connectionId);
+  }
+  
+  /**
+   * Remove connection tracking for an IP
+   */
+  public removeConnectionByIP(ip: string, connectionId: string): void {
+    if (this.connectionsByIP.has(ip)) {
+      const connections = this.connectionsByIP.get(ip)!;
+      connections.delete(connectionId);
+      if (connections.size === 0) {
+        this.connectionsByIP.delete(ip);
+      }
+    }
+  }
+  
+  /**
+   * Check if an IP is allowed using glob patterns
+   */
+  public isIPAuthorized(ip: string, allowedIPs: string[], blockedIPs: string[] = []): boolean {
+    // Skip IP validation if allowedIPs is empty
+    if (!ip || (allowedIPs.length === 0 && blockedIPs.length === 0)) {
+      return true;
+    }
+    
+    // First check if IP is blocked
+    if (blockedIPs.length > 0 && this.isGlobIPMatch(ip, blockedIPs)) {
+      return false;
+    }
+    
+    // Then check if IP is allowed
+    return this.isGlobIPMatch(ip, allowedIPs);
+  }
+  
+  /**
+   * Check if the IP matches any of the glob patterns
+   */
+  private isGlobIPMatch(ip: string, patterns: string[]): boolean {
+    if (!ip || !patterns || patterns.length === 0) return false;
+
+    const normalizeIP = (ip: string): string[] => {
+      if (!ip) return [];
+      if (ip.startsWith('::ffff:')) {
+        const ipv4 = ip.slice(7);
+        return [ip, ipv4];
+      }
+      if (/^\d{1,3}(\.\d{1,3}){3}$/.test(ip)) {
+        return [ip, `::ffff:${ip}`];
+      }
+      return [ip];
+    };
+
+    const normalizedIPVariants = normalizeIP(ip);
+    if (normalizedIPVariants.length === 0) return false;
+
+    const expandedPatterns = patterns.flatMap(normalizeIP);
+    return normalizedIPVariants.some((ipVariant) =>
+      expandedPatterns.some((pattern) => plugins.minimatch(ipVariant, pattern))
+    );
+  }
+  
+  /**
+   * Check if IP should be allowed considering connection rate and max connections
+   * @returns Object with result and reason
+   */
+  public validateIP(ip: string): { allowed: boolean; reason?: string } {
+    // Check connection count limit
+    if (
+      this.settings.maxConnectionsPerIP &&
+      this.getConnectionCountByIP(ip) >= this.settings.maxConnectionsPerIP
+    ) {
+      return {
+        allowed: false,
+        reason: `Maximum connections per IP (${this.settings.maxConnectionsPerIP}) exceeded`
+      };
+    }
+
+    // Check connection rate limit
+    if (
+      this.settings.connectionRateLimitPerMinute && 
+      !this.checkConnectionRate(ip)
+    ) {
+      return {
+        allowed: false,
+        reason: `Connection rate limit (${this.settings.connectionRateLimitPerMinute}/min) exceeded`
+      };
+    }
+    
+    return { allowed: true };
+  }
+  
+  /**
+   * Clears all IP tracking data (for shutdown)
+   */
+  public clearIPTracking(): void {
+    this.connectionsByIP.clear();
+    this.connectionRateByIP.clear();
+  }
+}

ts/classes.pp.timeoutmanager.ts

@@ -0,0 +1,190 @@
+import type { IConnectionRecord, IPortProxySettings } from './classes.pp.interfaces.js';
+
+/**
+ * Manages timeouts and inactivity tracking for connections
+ */
+export class TimeoutManager {
+  constructor(private settings: IPortProxySettings) {}
+  
+  /**
+   * Ensure timeout values don't exceed Node.js max safe integer
+   */
+  public ensureSafeTimeout(timeout: number): number {
+    const MAX_SAFE_TIMEOUT = 2147483647; // Maximum safe value (2^31 - 1)
+    return Math.min(Math.floor(timeout), MAX_SAFE_TIMEOUT);
+  }
+  
+  /**
+   * Generate a slightly randomized timeout to prevent thundering herd
+   */
+  public randomizeTimeout(baseTimeout: number, variationPercent: number = 5): number {
+    const safeBaseTimeout = this.ensureSafeTimeout(baseTimeout);
+    const variation = safeBaseTimeout * (variationPercent / 100);
+    return this.ensureSafeTimeout(
+      safeBaseTimeout + Math.floor(Math.random() * variation * 2) - variation
+    );
+  }
+  
+  /**
+   * Update connection activity timestamp
+   */
+  public updateActivity(record: IConnectionRecord): void {
+    record.lastActivity = Date.now();
+
+    // Clear any inactivity warning
+    if (record.inactivityWarningIssued) {
+      record.inactivityWarningIssued = false;
+    }
+  }
+  
+  /**
+   * Calculate effective inactivity timeout based on connection type
+   */
+  public getEffectiveInactivityTimeout(record: IConnectionRecord): number {
+    let effectiveTimeout = this.settings.inactivityTimeout || 14400000; // 4 hours default
+    
+    // For immortal keep-alive connections, use an extremely long timeout
+    if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'immortal') {
+      return Number.MAX_SAFE_INTEGER;
+    }
+    
+    // For extended keep-alive connections, apply multiplier
+    if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'extended') {
+      const multiplier = this.settings.keepAliveInactivityMultiplier || 6;
+      effectiveTimeout = effectiveTimeout * multiplier;
+    }
+    
+    return this.ensureSafeTimeout(effectiveTimeout);
+  }
+  
+  /**
+   * Calculate effective max lifetime based on connection type
+   */
+  public getEffectiveMaxLifetime(record: IConnectionRecord): number {
+    // Use domain-specific timeout if available
+    const baseTimeout = record.domainConfig?.connectionTimeout || 
+                        this.settings.maxConnectionLifetime || 
+                        86400000; // 24 hours default
+    
+    // For immortal keep-alive connections, use an extremely long lifetime
+    if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'immortal') {
+      return Number.MAX_SAFE_INTEGER;
+    }
+    
+    // For extended keep-alive connections, use the extended lifetime setting
+    if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'extended') {
+      return this.ensureSafeTimeout(
+        this.settings.extendedKeepAliveLifetime || 7 * 24 * 60 * 60 * 1000 // 7 days default
+      );
+    }
+    
+    // Apply randomization if enabled
+    if (this.settings.enableRandomizedTimeouts) {
+      return this.randomizeTimeout(baseTimeout);
+    }
+    
+    return this.ensureSafeTimeout(baseTimeout);
+  }
+  
+  /**
+   * Setup connection timeout
+   * @returns The cleanup timer
+   */
+  public setupConnectionTimeout(
+    record: IConnectionRecord, 
+    onTimeout: (record: IConnectionRecord, reason: string) => void
+  ): NodeJS.Timeout {
+    // Clear any existing timer
+    if (record.cleanupTimer) {
+      clearTimeout(record.cleanupTimer);
+    }
+    
+    // Calculate effective timeout
+    const effectiveLifetime = this.getEffectiveMaxLifetime(record);
+    
+    // Set up the timeout
+    const timer = setTimeout(() => {
+      // Call the provided callback
+      onTimeout(record, 'connection_timeout');
+    }, effectiveLifetime);
+    
+    // Make sure timeout doesn't keep the process alive
+    if (timer.unref) {
+      timer.unref();
+    }
+    
+    return timer;
+  }
+  
+  /**
+   * Check for inactivity on a connection
+   * @returns Object with check results
+   */
+  public checkInactivity(record: IConnectionRecord): {
+    isInactive: boolean;
+    shouldWarn: boolean;
+    inactivityTime: number;
+    effectiveTimeout: number;
+  } {
+    // Skip for connections with inactivity check disabled
+    if (this.settings.disableInactivityCheck) {
+      return {
+        isInactive: false,
+        shouldWarn: false,
+        inactivityTime: 0,
+        effectiveTimeout: 0
+      };
+    }
+    
+    // Skip for immortal keep-alive connections
+    if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'immortal') {
+      return {
+        isInactive: false,
+        shouldWarn: false,
+        inactivityTime: 0,
+        effectiveTimeout: 0
+      };
+    }
+    
+    const now = Date.now();
+    const inactivityTime = now - record.lastActivity;
+    const effectiveTimeout = this.getEffectiveInactivityTimeout(record);
+    
+    // Check if inactive
+    const isInactive = inactivityTime > effectiveTimeout;
+    
+    // For keep-alive connections, we should warn first
+    const shouldWarn = record.hasKeepAlive && 
+                       isInactive && 
+                       !record.inactivityWarningIssued;
+    
+    return {
+      isInactive,
+      shouldWarn,
+      inactivityTime,
+      effectiveTimeout
+    };
+  }
+  
+  /**
+   * Apply socket timeout settings
+   */
+  public applySocketTimeouts(record: IConnectionRecord): void {
+    // Skip for immortal keep-alive connections
+    if (record.hasKeepAlive && this.settings.keepAliveTreatment === 'immortal') {
+      // Disable timeouts completely for immortal connections
+      record.incoming.setTimeout(0);
+      if (record.outgoing) {
+        record.outgoing.setTimeout(0);
+      }
+      return;
+    }
+    
+    // Apply normal timeouts
+    const timeout = this.ensureSafeTimeout(this.settings.socketTimeout || 3600000); // 1 hour default
+    record.incoming.setTimeout(timeout);
+    if (record.outgoing) {
+      record.outgoing.setTimeout(timeout);
+    }
+  }
+}

ts/classes.pp.tlsalert.ts

@@ -0,0 +1,218 @@
+import * as net from 'net';
+
+/**
+ * TlsAlert class for managing TLS alert messages
+ */
+export class TlsAlert {
+  // TLS Alert Levels
+  static readonly LEVEL_WARNING = 0x01;
+  static readonly LEVEL_FATAL = 0x02;
+  
+  // TLS Alert Description Codes - RFC 8446 (TLS 1.3) / RFC 5246 (TLS 1.2)
+  static readonly CLOSE_NOTIFY = 0x00;
+  static readonly UNEXPECTED_MESSAGE = 0x0A;
+  static readonly BAD_RECORD_MAC = 0x14;
+  static readonly DECRYPTION_FAILED = 0x15; // TLS 1.0 only
+  static readonly RECORD_OVERFLOW = 0x16;
+  static readonly DECOMPRESSION_FAILURE = 0x1E; // TLS 1.2 and below
+  static readonly HANDSHAKE_FAILURE = 0x28;
+  static readonly NO_CERTIFICATE = 0x29; // SSLv3 only
+  static readonly BAD_CERTIFICATE = 0x2A;
+  static readonly UNSUPPORTED_CERTIFICATE = 0x2B;
+  static readonly CERTIFICATE_REVOKED = 0x2C;
+  static readonly CERTIFICATE_EXPIRED = 0x2F;
+  static readonly CERTIFICATE_UNKNOWN = 0x30;
+  static readonly ILLEGAL_PARAMETER = 0x2F;
+  static readonly UNKNOWN_CA = 0x30;
+  static readonly ACCESS_DENIED = 0x31;
+  static readonly DECODE_ERROR = 0x32;
+  static readonly DECRYPT_ERROR = 0x33;
+  static readonly EXPORT_RESTRICTION = 0x3C; // TLS 1.0 only
+  static readonly PROTOCOL_VERSION = 0x46;
+  static readonly INSUFFICIENT_SECURITY = 0x47;
+  static readonly INTERNAL_ERROR = 0x50;
+  static readonly INAPPROPRIATE_FALLBACK = 0x56;
+  static readonly USER_CANCELED = 0x5A;
+  static readonly NO_RENEGOTIATION = 0x64; // TLS 1.2 and below
+  static readonly MISSING_EXTENSION = 0x6D; // TLS 1.3
+  static readonly UNSUPPORTED_EXTENSION = 0x6E; // TLS 1.3
+  static readonly CERTIFICATE_REQUIRED = 0x6F; // TLS 1.3
+  static readonly UNRECOGNIZED_NAME = 0x70;
+  static readonly BAD_CERTIFICATE_STATUS_RESPONSE = 0x71;
+  static readonly BAD_CERTIFICATE_HASH_VALUE = 0x72; // TLS 1.2 and below
+  static readonly UNKNOWN_PSK_IDENTITY = 0x73;
+  static readonly CERTIFICATE_REQUIRED_1_3 = 0x74; // TLS 1.3
+  static readonly NO_APPLICATION_PROTOCOL = 0x78;
+  
+  /**
+   * Create a TLS alert buffer with the specified level and description code
+   * 
+   * @param level Alert level (warning or fatal)
+   * @param description Alert description code
+   * @param tlsVersion TLS version bytes (default is TLS 1.2: 0x0303)
+   * @returns Buffer containing the TLS alert message
+   */
+  static create(
+    level: number,
+    description: number,
+    tlsVersion: [number, number] = [0x03, 0x03]
+  ): Buffer {
+    return Buffer.from([
+      0x15, // Alert record type
+      tlsVersion[0],
+      tlsVersion[1], // TLS version (default to TLS 1.2: 0x0303)
+      0x00,
+      0x02, // Length
+      level, // Alert level
+      description, // Alert description
+    ]);
+  }
+  
+  /**
+   * Create a warning-level TLS alert
+   * 
+   * @param description Alert description code
+   * @returns Buffer containing the warning-level TLS alert message
+   */
+  static createWarning(description: number): Buffer {
+    return this.create(this.LEVEL_WARNING, description);
+  }
+  
+  /**
+   * Create a fatal-level TLS alert
+   * 
+   * @param description Alert description code
+   * @returns Buffer containing the fatal-level TLS alert message
+   */
+  static createFatal(description: number): Buffer {
+    return this.create(this.LEVEL_FATAL, description);
+  }
+  
+  /**
+   * Send a TLS alert to a socket and optionally close the connection
+   * 
+   * @param socket The socket to send the alert to
+   * @param level Alert level (warning or fatal)
+   * @param description Alert description code
+   * @param closeAfterSend Whether to close the connection after sending the alert
+   * @param closeDelay Milliseconds to wait before closing the connection (default: 200ms)
+   * @returns Promise that resolves when the alert has been sent
+   */
+  static async send(
+    socket: net.Socket,
+    level: number,
+    description: number,
+    closeAfterSend: boolean = false,
+    closeDelay: number = 200
+  ): Promise<void> {
+    const alert = this.create(level, description);
+    
+    return new Promise<void>((resolve, reject) => {
+      try {
+        // Ensure the alert is written as a single packet
+        socket.cork();
+        const writeSuccessful = socket.write(alert, (err) => {
+          if (err) {
+            reject(err);
+            return;
+          }
+          
+          if (closeAfterSend) {
+            setTimeout(() => {
+              socket.end();
+              resolve();
+            }, closeDelay);
+          } else {
+            resolve();
+          }
+        });
+        socket.uncork();
+        
+        // If write wasn't successful immediately, wait for drain
+        if (!writeSuccessful && !closeAfterSend) {
+          socket.once('drain', () => {
+            resolve();
+          });
+        }
+      } catch (err) {
+        reject(err);
+      }
+    });
+  }
+  
+  /**
+   * Pre-defined TLS alert messages
+   */
+  static readonly alerts = {
+    // Warning level alerts
+    closeNotify: TlsAlert.createWarning(TlsAlert.CLOSE_NOTIFY),
+    unsupportedExtension: TlsAlert.createWarning(TlsAlert.UNSUPPORTED_EXTENSION),
+    certificateRequired: TlsAlert.createWarning(TlsAlert.CERTIFICATE_REQUIRED),
+    unrecognizedName: TlsAlert.createWarning(TlsAlert.UNRECOGNIZED_NAME),
+    noRenegotiation: TlsAlert.createWarning(TlsAlert.NO_RENEGOTIATION),
+    userCanceled: TlsAlert.createWarning(TlsAlert.USER_CANCELED),
+    
+    // Warning level alerts for session resumption
+    certificateExpiredWarning: TlsAlert.createWarning(TlsAlert.CERTIFICATE_EXPIRED),
+    handshakeFailureWarning: TlsAlert.createWarning(TlsAlert.HANDSHAKE_FAILURE),
+    insufficientSecurityWarning: TlsAlert.createWarning(TlsAlert.INSUFFICIENT_SECURITY),
+    
+    // Fatal level alerts
+    unexpectedMessage: TlsAlert.createFatal(TlsAlert.UNEXPECTED_MESSAGE),
+    badRecordMac: TlsAlert.createFatal(TlsAlert.BAD_RECORD_MAC),
+    recordOverflow: TlsAlert.createFatal(TlsAlert.RECORD_OVERFLOW),
+    handshakeFailure: TlsAlert.createFatal(TlsAlert.HANDSHAKE_FAILURE),
+    badCertificate: TlsAlert.createFatal(TlsAlert.BAD_CERTIFICATE),
+    certificateExpired: TlsAlert.createFatal(TlsAlert.CERTIFICATE_EXPIRED),
+    certificateUnknown: TlsAlert.createFatal(TlsAlert.CERTIFICATE_UNKNOWN),
+    illegalParameter: TlsAlert.createFatal(TlsAlert.ILLEGAL_PARAMETER),
+    unknownCA: TlsAlert.createFatal(TlsAlert.UNKNOWN_CA),
+    accessDenied: TlsAlert.createFatal(TlsAlert.ACCESS_DENIED),
+    decodeError: TlsAlert.createFatal(TlsAlert.DECODE_ERROR),
+    decryptError: TlsAlert.createFatal(TlsAlert.DECRYPT_ERROR),
+    protocolVersion: TlsAlert.createFatal(TlsAlert.PROTOCOL_VERSION),
+    insufficientSecurity: TlsAlert.createFatal(TlsAlert.INSUFFICIENT_SECURITY),
+    internalError: TlsAlert.createFatal(TlsAlert.INTERNAL_ERROR),
+  };
+  
+  /**
+   * Utility method to send a warning-level unrecognized_name alert
+   * Specifically designed for SNI issues to encourage the client to retry with SNI
+   * 
+   * @param socket The socket to send the alert to
+   * @returns Promise that resolves when the alert has been sent
+   */
+  static async sendSniRequired(socket: net.Socket): Promise<void> {
+    return this.send(socket, this.LEVEL_WARNING, this.UNRECOGNIZED_NAME);
+  }
+  
+  /**
+   * Utility method to send a close_notify alert and close the connection
+   * 
+   * @param socket The socket to send the alert to
+   * @param closeDelay Milliseconds to wait before closing the connection (default: 200ms)
+   * @returns Promise that resolves when the alert has been sent and the connection closed
+   */
+  static async sendCloseNotify(socket: net.Socket, closeDelay: number = 200): Promise<void> {
+    return this.send(socket, this.LEVEL_WARNING, this.CLOSE_NOTIFY, true, closeDelay);
+  }
+  
+  /**
+   * Utility method to send a certificate_expired alert to force new TLS session
+   * 
+   * @param socket The socket to send the alert to
+   * @param fatal Whether to send as a fatal alert (default: false)
+   * @param closeAfterSend Whether to close the connection after sending the alert (default: true)
+   * @param closeDelay Milliseconds to wait before closing the connection (default: 200ms)
+   * @returns Promise that resolves when the alert has been sent
+   */
+  static async sendCertificateExpired(
+    socket: net.Socket,
+    fatal: boolean = false,
+    closeAfterSend: boolean = true,
+    closeDelay: number = 200
+  ): Promise<void> {
+    const level = fatal ? this.LEVEL_FATAL : this.LEVEL_WARNING;
+    return this.send(socket, level, this.CERTIFICATE_EXPIRED, closeAfterSend, closeDelay);
+  }
+}

ts/classes.pp.tlsmanager.ts

@@ -0,0 +1,206 @@
+import * as plugins from './plugins.js';
+import type { IPortProxySettings } from './classes.pp.interfaces.js';
+import { SniHandler } from './classes.pp.snihandler.js';
+
+/**
+ * Interface for connection information used for SNI extraction
+ */
+interface IConnectionInfo {
+  sourceIp: string;
+  sourcePort: number;
+  destIp: string;
+  destPort: number;
+}
+
+/**
+ * Manages TLS-related operations including SNI extraction and validation
+ */
+export class TlsManager {
+  constructor(private settings: IPortProxySettings) {}
+  
+  /**
+   * Check if a data chunk appears to be a TLS handshake
+   */
+  public isTlsHandshake(chunk: Buffer): boolean {
+    return SniHandler.isTlsHandshake(chunk);
+  }
+  
+  /**
+   * Check if a data chunk appears to be a TLS ClientHello
+   */
+  public isClientHello(chunk: Buffer): boolean {
+    return SniHandler.isClientHello(chunk);
+  }
+  
+  /**
+   * Extract Server Name Indication (SNI) from TLS handshake
+   */
+  public extractSNI(
+    chunk: Buffer, 
+    connInfo: IConnectionInfo, 
+    previousDomain?: string
+  ): string | undefined {
+    // Use the SniHandler to process the TLS packet
+    return SniHandler.processTlsPacket(
+      chunk,
+      connInfo,
+      this.settings.enableTlsDebugLogging || false,
+      previousDomain
+    );
+  }
+  
+  /**
+   * Handle session resumption attempts
+   */
+  public handleSessionResumption(
+    chunk: Buffer, 
+    connectionId: string,
+    hasSNI: boolean
+  ): { shouldBlock: boolean; reason?: string } {
+    // Skip if session tickets are allowed
+    if (this.settings.allowSessionTicket !== false) {
+      return { shouldBlock: false };
+    }
+    
+    // Check for session resumption attempt
+    const resumptionInfo = SniHandler.hasSessionResumption(
+      chunk,
+      this.settings.enableTlsDebugLogging || false
+    );
+    
+    // If this is a resumption attempt without SNI, block it
+    if (resumptionInfo.isResumption && !hasSNI && !resumptionInfo.hasSNI) {
+      if (this.settings.enableTlsDebugLogging) {
+        console.log(
+          `[${connectionId}] Session resumption detected without SNI and allowSessionTicket=false. ` +
+          `Terminating connection to force new TLS handshake.`
+        );
+      }
+      return { 
+        shouldBlock: true, 
+        reason: 'session_ticket_blocked' 
+      };
+    }
+    
+    return { shouldBlock: false };
+  }
+  
+  /**
+   * Check for SNI mismatch during renegotiation
+   */
+  public checkRenegotiationSNI(
+    chunk: Buffer,
+    connInfo: IConnectionInfo,
+    expectedDomain: string,
+    connectionId: string
+  ): { hasMismatch: boolean; extractedSNI?: string } {
+    // Only process if this looks like a TLS ClientHello
+    if (!this.isClientHello(chunk)) {
+      return { hasMismatch: false };
+    }
+    
+    try {
+      // Extract SNI with renegotiation support
+      const newSNI = SniHandler.extractSNIWithResumptionSupport(
+        chunk,
+        connInfo,
+        this.settings.enableTlsDebugLogging || false
+      );
+
+      // Skip if no SNI was found
+      if (!newSNI) return { hasMismatch: false };
+
+      // Check for SNI mismatch
+      if (newSNI !== expectedDomain) {
+        if (this.settings.enableTlsDebugLogging) {
+          console.log(
+            `[${connectionId}] Renegotiation with different SNI: ${expectedDomain} -> ${newSNI}. ` +
+            `Terminating connection - SNI domain switching is not allowed.`
+          );
+        }
+        return { hasMismatch: true, extractedSNI: newSNI };
+      } else if (this.settings.enableTlsDebugLogging) {
+        console.log(
+          `[${connectionId}] Renegotiation detected with same SNI: ${newSNI}. Allowing.`
+        );
+      }
+    } catch (err) {
+      console.log(
+        `[${connectionId}] Error processing ClientHello: ${err}. Allowing connection to continue.`
+      );
+    }
+    
+    return { hasMismatch: false };
+  }
+  
+  /**
+   * Create a renegotiation handler function for a connection
+   */
+  public createRenegotiationHandler(
+    connectionId: string,
+    lockedDomain: string,
+    connInfo: IConnectionInfo,
+    onMismatch: (connectionId: string, reason: string) => void
+  ): (chunk: Buffer) => void {
+    return (chunk: Buffer) => {
+      const result = this.checkRenegotiationSNI(chunk, connInfo, lockedDomain, connectionId);
+      if (result.hasMismatch) {
+        onMismatch(connectionId, 'sni_mismatch');
+      }
+    };
+  }
+  
+  /**
+   * Analyze TLS connection for browser fingerprinting
+   * This helps identify browser vs non-browser connections
+   */
+  public analyzeClientHello(chunk: Buffer): { 
+    isBrowserConnection: boolean; 
+    isRenewal: boolean;
+    hasSNI: boolean;
+  } {
+    // Default result
+    const result = { 
+      isBrowserConnection: false, 
+      isRenewal: false,
+      hasSNI: false
+    };
+    
+    try {
+      // Check if it's a ClientHello
+      if (!this.isClientHello(chunk)) {
+        return result;
+      }
+      
+      // Check for session resumption
+      const resumptionInfo = SniHandler.hasSessionResumption(
+        chunk,
+        this.settings.enableTlsDebugLogging || false
+      );
+      
+      // Extract SNI
+      const sni = SniHandler.extractSNI(
+        chunk,
+        this.settings.enableTlsDebugLogging || false
+      );
+      
+      // Update result
+      result.isRenewal = resumptionInfo.isResumption;
+      result.hasSNI = !!sni;
+      
+      // Browsers typically:
+      // 1. Send SNI extension
+      // 2. Have a variety of extensions (ALPN, etc.)
+      // 3. Use standard cipher suites
+      // ...more complex heuristics could be implemented here
+      
+      // Simple heuristic: presence of SNI suggests browser
+      result.isBrowserConnection = !!sni; 
+      
+      return result;
+    } catch (err) {
+      console.log(`Error analyzing ClientHello: ${err}`);
+      return result;
+    }
+  }
+}

ts/index.ts

@@ -1,6 +1,6 @@
 export * from './classes.iptablesproxy.js';
 export * from './classes.networkproxy.js';
-export * from './classes.portproxy.js';
+export * from './classes.pp.portproxy.js';
 export * from './classes.port80handler.js';
 export * from './classes.sslredirect.js';
-export * from './classes.snihandler.js';
+export * from './classes.pp.snihandler.js';