3.41.8

changelog.md

@@ -1,5 +1,57 @@
 # Changelog
 
+## 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.
+
+- Added logging to output the extracted SNI value during renegotiation, initial ClientHello and in the SNI handler.
+- Enhanced error handling during SNI extraction to aid troubleshooting of TLS session resumption issues.
+
+## 2025-03-12 - 3.41.3 - fix(TLS/SNI)
+Improve TLS session resumption handling and logging. Now, session resumption attempts are always logged with details, and connections without a proper SNI are rejected when allowSessionTicket is disabled. In addition, empty SNI extensions are explicitly treated as missing, ensuring stricter and more consistent TLS handshake validation.
+
+- Always log session resumption in both renegotiation and initial ClientHello processing.
+- Terminate connections that attempt session resumption without SNI when allowSessionTicket is false.
+- Treat empty SNI extensions as absence of SNI to improve consistency in TLS handshake processing.
+
+## 2025-03-11 - 3.41.2 - fix(SniHandler)
+Refactor hasSessionResumption to return detailed session resumption info
+
+- Changed the return type of hasSessionResumption from boolean to an object with properties isResumption and hasSNI
+- Updated early return conditions to return { isResumption: false, hasSNI: false } when buffer is too short or invalid
+- Modified corresponding documentation to reflect the new return type
+
 ## 2025-03-11 - 3.41.1 - fix(SniHandler)
 Improve TLS SNI session resumption handling: connections containing a session ticket are now only rejected when no SNI is present and allowSessionTicket is disabled. Updated return values and logging for clearer resumption detection.
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@push.rocks/smartproxy",
-  "version": "3.41.1",
+  "version": "3.41.8",
   "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",

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartproxy',
-  version: '3.41.1',
+  version: '3.41.8',
   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.portproxy.ts

@@ -216,7 +216,7 @@ export class PortProxy {
       targetIP: settingsArg.targetIP || 'localhost',
 
       // Timeout settings with reasonable defaults
-      initialDataTimeout: settingsArg.initialDataTimeout || 60000, // 60 seconds for initial handshake
+      initialDataTimeout: settingsArg.initialDataTimeout || 120000, // 120 seconds for initial handshake
       socketTimeout: ensureSafeTimeout(settingsArg.socketTimeout || 3600000), // 1 hour socket timeout
       inactivityCheckInterval: settingsArg.inactivityCheckInterval || 60000, // 60 seconds interval
       maxConnectionLifetime: ensureSafeTimeout(settingsArg.maxConnectionLifetime || 86400000), // 24 hours default
@@ -232,13 +232,13 @@ export class PortProxy {
 
       // Feature flags
       disableInactivityCheck: settingsArg.disableInactivityCheck || false,
-      enableKeepAliveProbes: settingsArg.enableKeepAliveProbes !== undefined 
-                            ? settingsArg.enableKeepAliveProbes : true,
+      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,
+      allowSessionTicket:
+        settingsArg.allowSessionTicket !== undefined ? settingsArg.allowSessionTicket : true,
 
       // Rate limiting defaults
       maxConnectionsPerIP: settingsArg.maxConnectionsPerIP || 100,
@@ -261,8 +261,8 @@ export class PortProxy {
         renewThresholdDays: 30,
         autoRenew: true,
         certificateStore: './certs',
-        skipConfiguredCerts: false
-      }
+        skipConfiguredCerts: false,
+      },
     };
 
     // Initialize NetworkProxy if enabled
@@ -280,7 +280,7 @@ export class PortProxy {
       const networkProxyOptions: any = {
         port: this.settings.networkProxyPort!,
         portProxyIntegration: true,
-        logLevel: this.settings.enableDetailedLogging ? 'debug' : 'info'
+        logLevel: this.settings.enableDetailedLogging ? 'debug' : 'info',
       };
 
       // Add ACME settings if configured
@@ -321,7 +321,7 @@ export class PortProxy {
     // Update settings
     this.settings.acme = {
       ...this.settings.acme,
-      ...acmeSettings
+      ...acmeSettings,
     };
 
     // If NetworkProxy is initialized, update its ACME settings
@@ -379,17 +379,19 @@ export class PortProxy {
       try {
         certPair = {
           key: fs.readFileSync('assets/certs/key.pem', 'utf8'),
-          cert: fs.readFileSync('assets/certs/cert.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');
+        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: ''
+          cert: '',
         };
       }
 
@@ -402,8 +404,8 @@ export class PortProxy {
       // 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);
+          .filter((config) => !config.hostName.includes('*')) // Exclude wildcards
+          .map((config) => config.hostName);
 
         if (acmeEligibleDomains.length > 0) {
           console.log(`Domains eligible for ACME certificates: ${acmeEligibleDomains.join(', ')}`);
@@ -413,9 +415,14 @@ export class PortProxy {
       }
 
       // Update NetworkProxy with the converted configs
-      this.networkProxy.updateProxyConfigs(proxyConfigs).then(() => {
-        console.log(`Successfully synchronized ${proxyConfigs.length} domain configurations to NetworkProxy`);
-      }).catch(err => {
+      this.networkProxy
+        .updateProxyConfigs(proxyConfigs)
+        .then(() => {
+          console.log(
+            `Successfully synchronized ${proxyConfigs.length} domain configurations to NetworkProxy`
+          );
+        })
+        .catch((err) => {
           console.log(`Error synchronizing configurations: ${err.message}`);
         });
     } catch (err) {
@@ -546,9 +553,7 @@ export class PortProxy {
       proxySocket.on('data', () => this.updateActivity(record));
 
       if (this.settings.enableDetailedLogging) {
-        console.log(
-          `[${connectionId}] TLS connection successfully forwarded to NetworkProxy`
-        );
+        console.log(`[${connectionId}] TLS connection successfully forwarded to NetworkProxy`);
       }
     });
   }
@@ -849,16 +854,35 @@ export class PortProxy {
       // Process any remaining data in the queue before switching to piping
       processDataQueue();
       
-      // Setup function to establish piping - we'll use this after flushing data
-      const setupPiping = () => {
-        // Mark that we're switching to piping mode
+      // Set up piping immediately - don't delay this crucial step
       pipingEstablished = true;
       
-        // Setup piping in both directions
+      // Flush all pending data to target
+      if (record.pendingData.length > 0) {
+        const combinedData = Buffer.concat(record.pendingData);
+        
+        if (this.settings.enableDetailedLogging) {
+          console.log(`[${connectionId}] Forwarding ${combinedData.length} bytes of initial data to target`);
+        }
+        
+        // Write pending data immediately
+        targetSocket.write(combinedData, (err) => {
+          if (err) {
+            console.log(`[${connectionId}] Error writing pending data to target: ${err.message}`);
+            return this.initiateCleanupOnce(record, 'write_error');
+          }
+        });
+        
+        // Clear the buffer now that we've processed it
+        record.pendingData = [];
+        record.pendingDataSize = 0;
+      }
+      
+      // Setup piping in both directions without any delays
       socket.pipe(targetSocket);
       targetSocket.pipe(socket);
       
-        // Resume the socket to ensure data flows
+      // Resume the socket to ensure data flows - CRITICAL!
       socket.resume();
       
       // Process any data that might be queued in the interim
@@ -898,28 +922,7 @@ export class PortProxy {
             }`
         );
       }
-      };
 
-      // Flush all pending data to target
-      if (record.pendingData.length > 0) {
-        const combinedData = Buffer.concat(record.pendingData);
-        targetSocket.write(combinedData, (err) => {
-          if (err) {
-            console.log(`[${connectionId}] Error writing pending data to target: ${err.message}`);
-            return this.initiateCleanupOnce(record, 'write_error');
-          }
-
-          // Establish piping now that we've flushed the buffered data
-          setupPiping();
-        });
-      } else {
-        // No pending data, just establish piping immediately
-        setupPiping();
-      }
-
-      // Clear the buffer now that we've processed it
-      record.pendingData = [];
-      record.pendingDataSize = 0;
 
       // Add the renegotiation handler for SNI validation with strict domain enforcement
       // This will be called after we've established piping
@@ -935,33 +938,55 @@ export class PortProxy {
                 sourceIp: record.remoteIP,
                 sourcePort: record.incoming.remotePort || 0,
                 destIp: record.incoming.localAddress || '',
-                destPort: record.incoming.localPort || 0
+                destPort: record.incoming.localPort || 0,
               };
 
               // Check for session tickets if allowSessionTicket is disabled
               if (this.settings.allowSessionTicket === false) {
                 // Analyze for session resumption attempt (session ticket or PSK)
-                const resumptionInfo = SniHandler.hasSessionResumption(renegChunk, this.settings.enableTlsDebugLogging);
+                const resumptionInfo = SniHandler.hasSessionResumption(
+                  renegChunk,
+                  this.settings.enableTlsDebugLogging
+                );
 
-                // Only block if there's a session ticket without SNI
-                if (resumptionInfo.isResumption && !resumptionInfo.hasSNI) {
+                if (resumptionInfo.isResumption) {
+                  // Always log resumption attempt for easier debugging
+                  // Try to extract SNI for logging
+                  const extractedSNI = SniHandler.extractSNI(
+                    renegChunk,
+                    this.settings.enableTlsDebugLogging
+                  );
                   console.log(
-                    `[${connectionId}] Session ticket detected in renegotiation without SNI and allowSessionTicket=false. ` +
+                    `[${connectionId}] Session resumption detected in renegotiation. ` +
+                      `Has SNI: ${resumptionInfo.hasSNI ? 'Yes' : 'No'}, ` +
+                      `SNI value: ${extractedSNI || 'None'}, ` +
+                      `allowSessionTicket: ${this.settings.allowSessionTicket}`
+                  );
+
+                  // Block if there's session resumption without SNI
+                  if (!resumptionInfo.hasSNI) {
+                    console.log(
+                      `[${connectionId}] Session resumption detected in renegotiation without SNI and allowSessionTicket=false. ` +
                         `Terminating connection to force new TLS handshake.`
                     );
                     this.initiateCleanupOnce(record, 'session_ticket_blocked');
                     return;
-                } else if (resumptionInfo.isResumption && resumptionInfo.hasSNI) {
-                  if (this.settings.enableTlsDebugLogging) {
+                  } else {
+                    if (this.settings.enableDetailedLogging) {
                       console.log(
-                      `[${connectionId}] Session ticket with SNI detected in renegotiation. ` +
+                        `[${connectionId}] Session resumption with SNI detected in renegotiation. ` +
                           `Allowing connection since SNI is present.`
                       );
                     }
                   }
                 }
+              }
 
-              const newSNI = SniHandler.extractSNIWithResumptionSupport(renegChunk, connInfo, this.settings.enableTlsDebugLogging);
+              const newSNI = SniHandler.extractSNIWithResumptionSupport(
+                renegChunk,
+                connInfo,
+                this.settings.enableTlsDebugLogging
+              );
 
               // Skip if no SNI was found
               if (!newSNI) return;
@@ -995,9 +1020,13 @@ export class PortProxy {
         socket.on('data', renegotiationHandler);
 
         if (this.settings.enableDetailedLogging) {
-          console.log(`[${connectionId}] TLS renegotiation handler installed for SNI domain: ${serverName}`);
+          console.log(
+            `[${connectionId}] TLS renegotiation handler installed for SNI domain: ${serverName}`
+          );
           if (this.settings.allowSessionTicket === false) {
-            console.log(`[${connectionId}] Session ticket usage is disabled. Connection will be reset on reconnection attempts.`);
+            console.log(
+              `[${connectionId}] Session ticket usage is disabled. Connection will be reset on reconnection attempts.`
+            );
           }
         }
       }
@@ -1390,7 +1419,11 @@ export class PortProxy {
     }
 
     // Initialize NetworkProxy if needed (useNetworkProxy is set but networkProxy isn't initialized)
-    if (this.settings.useNetworkProxy && this.settings.useNetworkProxy.length > 0 && !this.networkProxy) {
+    if (
+      this.settings.useNetworkProxy &&
+      this.settings.useNetworkProxy.length > 0 &&
+      !this.networkProxy
+    ) {
       await this.initializeNetworkProxy();
     }
 
@@ -1401,7 +1434,11 @@ export class PortProxy {
 
       // Log ACME status
       if (this.settings.acme?.enabled) {
-        console.log(`ACME certificate management is enabled (${this.settings.acme.useProduction ? 'Production' : 'Staging'} mode)`);
+        console.log(
+          `ACME certificate management is enabled (${
+            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
@@ -1524,8 +1561,8 @@ export class PortProxy {
 
       // Check if this connection should be forwarded directly to NetworkProxy
       // First check port-based forwarding settings
-      let shouldUseNetworkProxy = this.settings.useNetworkProxy && 
-                                 this.settings.useNetworkProxy.includes(localPort);
+      let shouldUseNetworkProxy =
+        this.settings.useNetworkProxy && this.settings.useNetworkProxy.includes(localPort);
 
       // We'll look for domain-specific settings after SNI extraction
 
@@ -1536,9 +1573,12 @@ export class PortProxy {
         // Set an initial timeout for handshake data
         let initialTimeout: NodeJS.Timeout | null = setTimeout(() => {
           if (!initialDataReceived) {
-            console.log(
-              `[${connectionId}] Initial data timeout (${this.settings.initialDataTimeout}ms) for connection from ${remoteIP} on port ${localPort}`
-            );
+            console.log(`[${connectionId}] Initial data warning (${this.settings.initialDataTimeout}ms) for connection from ${remoteIP}`);
+            
+            // Add a grace period instead of immediate termination
+            setTimeout(() => {
+              if (!initialDataReceived) {
+                console.log(`[${connectionId}] Final initial data timeout after grace period`);
                 if (connectionRecord.incomingTerminationReason === null) {
                   connectionRecord.incomingTerminationReason = 'initial_timeout';
                   this.incrementTerminationStat('incoming', 'initial_timeout');
@@ -1546,6 +1586,8 @@ export class PortProxy {
                 socket.end();
                 this.cleanupConnection(connectionRecord, 'initial_timeout');
               }
+            }, 30000); // 30 second grace period
+          }
         }, this.settings.initialDataTimeout!);
 
         // Make sure timeout doesn't keep the process alive
@@ -1566,19 +1608,53 @@ export class PortProxy {
           initialDataReceived = true;
           connectionRecord.hasReceivedInitialData = true;
 
+          // Block non-TLS connections on port 443
+          // Always enforce TLS on standard HTTPS port
+          if (!SniHandler.isTlsHandshake(chunk) && localPort === 443) {
+            console.log(
+              `[${connectionId}] Non-TLS connection detected on port 443. ` +
+                `Terminating connection - only TLS traffic is allowed on standard HTTPS port.`
+            );
+            if (connectionRecord.incomingTerminationReason === null) {
+              connectionRecord.incomingTerminationReason = 'non_tls_blocked';
+              this.incrementTerminationStat('incoming', 'non_tls_blocked');
+            }
+            socket.end();
+            this.cleanupConnection(connectionRecord, 'non_tls_blocked');
+            return;
+          }
+
           // Check if this looks like a TLS handshake
           if (SniHandler.isTlsHandshake(chunk)) {
             connectionRecord.isTLS = true;
 
-            // Check for session tickets if allowSessionTicket is disabled
+            // Check for TLS ClientHello with either no SNI or session tickets
             if (this.settings.allowSessionTicket === false && SniHandler.isClientHello(chunk)) {
-              // Analyze for session resumption attempt
-              const resumptionInfo = SniHandler.hasSessionResumption(chunk, this.settings.enableTlsDebugLogging);
+              // Extract SNI first
+              const extractedSNI = SniHandler.extractSNI(
+                chunk,
+                this.settings.enableTlsDebugLogging
+              );
+              const hasSNI = !!extractedSNI;
 
-              // Only block if there's a session ticket without SNI
-              if (resumptionInfo.isResumption && !resumptionInfo.hasSNI) {
+              // Analyze for session resumption attempt
+              const resumptionInfo = SniHandler.hasSessionResumption(
+                chunk,
+                this.settings.enableTlsDebugLogging
+              );
+
+              // Always log for debugging purposes
               console.log(
-                  `[${connectionId}] Session ticket detected in initial ClientHello without SNI and allowSessionTicket=false. ` +
+                `[${connectionId}] TLS ClientHello detected with allowSessionTicket=false. ` +
+                  `Has SNI: ${hasSNI ? 'Yes' : 'No'}, ` +
+                  `SNI value: ${extractedSNI || 'None'}, ` +
+                  `Has session resumption: ${resumptionInfo.isResumption ? 'Yes' : 'No'}`
+              );
+
+              // Block if this is a connection with session resumption but no SNI
+              if (resumptionInfo.isResumption && !hasSNI) {
+                console.log(
+                  `[${connectionId}] Session resumption detected in initial ClientHello without SNI and allowSessionTicket=false. ` +
                     `Terminating connection to force new TLS handshake.`
                 );
                 if (connectionRecord.incomingTerminationReason === null) {
@@ -1588,13 +1664,22 @@ export class PortProxy {
                 socket.end();
                 this.cleanupConnection(connectionRecord, 'session_ticket_blocked');
                 return;
-              } else if (resumptionInfo.isResumption && resumptionInfo.hasSNI) {
-                if (this.settings.enableTlsDebugLogging) {
-                  console.log(
-                    `[${connectionId}] Session ticket with SNI detected in initial ClientHello. ` +
-                    `Allowing connection since SNI is present.`
-                  );
               }
+
+              // Also block if this is a TLS connection without SNI when allowSessionTicket is false
+              // This forces clients to send SNI which helps with routing
+              if (!hasSNI && localPort === 443) {
+                console.log(
+                  `[${connectionId}] TLS ClientHello detected on port 443 without SNI and allowSessionTicket=false. ` +
+                    `Terminating connection to force proper SNI in handshake.`
+                );
+                if (connectionRecord.incomingTerminationReason === null) {
+                  connectionRecord.incomingTerminationReason = 'no_sni_blocked';
+                  this.incrementTerminationStat('incoming', 'no_sni_blocked');
+                }
+                socket.end();
+                this.cleanupConnection(connectionRecord, 'no_sni_blocked');
+                return;
               }
             }
 
@@ -1603,7 +1688,7 @@ export class PortProxy {
               sourceIp: remoteIP,
               sourcePort: socket.remotePort || 0,
               destIp: socket.localAddress || '',
-              destPort: socket.localPort || 0
+              destPort: socket.localPort || 0,
             };
 
             // Extract SNI to check for domain-specific NetworkProxy settings
@@ -1625,7 +1710,8 @@ export class PortProxy {
 
               // Use domain-specific NetworkProxy port if configured
               if (domainConfig?.useNetworkProxy) {
-                const networkProxyPort = domainConfig.networkProxyPort || this.settings.networkProxyPort;
+                const networkProxyPort =
+                  domainConfig.networkProxyPort || this.settings.networkProxyPort;
 
                 if (this.settings.enableDetailedLogging) {
                   console.log(
@@ -1634,7 +1720,13 @@ export class PortProxy {
                 }
 
                 // Forward to NetworkProxy with domain-specific port
-                this.forwardToNetworkProxy(connectionId, socket, connectionRecord, chunk, networkProxyPort);
+                this.forwardToNetworkProxy(
+                  connectionId,
+                  socket,
+                  connectionRecord,
+                  chunk,
+                  networkProxyPort
+                );
                 return;
               }
             }
@@ -1644,10 +1736,16 @@ export class PortProxy {
           } else {
             // If not TLS, use normal direct connection
             console.log(`[${connectionId}] Non-TLS connection on NetworkProxy port ${localPort}`);
-            this.setupDirectConnection(connectionId, socket, connectionRecord, undefined, undefined, chunk);
+            this.setupDirectConnection(
+              connectionId,
+              socket,
+              connectionRecord,
+              undefined,
+              undefined,
+              chunk
+            );
           }
         });
-        
       } else {
         // For non-NetworkProxy ports, proceed with normal processing
 
@@ -1669,9 +1767,12 @@ export class PortProxy {
         if (this.settings.sniEnabled) {
           initialTimeout = setTimeout(() => {
             if (!initialDataReceived) {
-              console.log(
-                `[${connectionId}] Initial data timeout (${this.settings.initialDataTimeout}ms) for connection from ${remoteIP} on port ${localPort}`
-              );
+              console.log(`[${connectionId}] Initial data warning (${this.settings.initialDataTimeout}ms) for connection from ${remoteIP}`);
+              
+              // Add a grace period instead of immediate termination
+              setTimeout(() => {
+                if (!initialDataReceived) {
+                  console.log(`[${connectionId}] Final initial data timeout after grace period`);
                   if (connectionRecord.incomingTerminationReason === null) {
                     connectionRecord.incomingTerminationReason = 'initial_timeout';
                     this.incrementTerminationStat('incoming', 'initial_timeout');
@@ -1679,6 +1780,8 @@ export class PortProxy {
                   socket.end();
                   this.cleanupConnection(connectionRecord, 'initial_timeout');
                 }
+              }, 30000); // 30 second grace period
+            }
           }, this.settings.initialDataTimeout!);
 
           // Make sure timeout doesn't keep the process alive
@@ -1711,7 +1814,7 @@ export class PortProxy {
                 sourceIp: remoteIP,
                 sourcePort: socket.remotePort || 0,
                 destIp: socket.localAddress || '',
-                destPort: socket.localPort || 0
+                destPort: socket.localPort || 0,
               };
 
               SniHandler.extractSNIWithResumptionSupport(chunk, debugConnInfo, true);
@@ -1774,7 +1877,8 @@ export class PortProxy {
               );
             }
 
-            const networkProxyPort = domainConfig.networkProxyPort || this.settings.networkProxyPort;
+            const networkProxyPort =
+              domainConfig.networkProxyPort || this.settings.networkProxyPort;
 
             if (initialChunk && connectionRecord.isTLS) {
               // For TLS connections with initial chunk, forward to NetworkProxy
@@ -1812,7 +1916,10 @@ export class PortProxy {
                 )}`
               );
             }
-          } else if (this.settings.defaultAllowedIPs && this.settings.defaultAllowedIPs.length > 0) {
+          } else if (
+            this.settings.defaultAllowedIPs &&
+            this.settings.defaultAllowedIPs.length > 0
+          ) {
             if (
               !isGlobIPAllowed(
                 remoteIP,
@@ -1925,6 +2032,7 @@ export class PortProxy {
           initialDataReceived = false;
 
           socket.once('data', (chunk: Buffer) => {
+            // Clear timeout immediately
             if (initialTimeout) {
               clearTimeout(initialTimeout);
               initialTimeout = null;
@@ -1932,6 +2040,39 @@ export class PortProxy {
             
             initialDataReceived = true;
             
+            // Add debugging ONLY if detailed logging is enabled - avoid heavy processing
+            if (this.settings.enableTlsDebugLogging && SniHandler.isClientHello(chunk)) {
+              // Move heavy debug logging to a separate async task to not block the flow
+              setImmediate(() => {
+                try {
+                  const resumptionInfo = SniHandler.hasSessionResumption(chunk, true);
+                  const standardSNI = SniHandler.extractSNI(chunk, true);
+                  const pskSNI = SniHandler.extractSNIFromPSKExtension(chunk, true);
+                  
+                  console.log(`[${connectionId}] ClientHello details: isResumption=${resumptionInfo.isResumption}, hasSNI=${resumptionInfo.hasSNI}`);
+                  console.log(`[${connectionId}] SNI extraction results: standardSNI=${standardSNI || 'none'}, pskSNI=${pskSNI || 'none'}`);
+                } catch (err) {
+                  console.log(`[${connectionId}] Error in debug logging: ${err}`);
+                }
+              });
+            }
+
+            // Block non-TLS connections on port 443
+            // Always enforce TLS on standard HTTPS port
+            if (!SniHandler.isTlsHandshake(chunk) && localPort === 443) {
+              console.log(
+                `[${connectionId}] Non-TLS connection detected on port 443 in SNI handler. ` +
+                  `Terminating connection - only TLS traffic is allowed on standard HTTPS port.`
+              );
+              if (connectionRecord.incomingTerminationReason === null) {
+                connectionRecord.incomingTerminationReason = 'non_tls_blocked';
+                this.incrementTerminationStat('incoming', 'non_tls_blocked');
+              }
+              socket.end();
+              this.cleanupConnection(connectionRecord, 'non_tls_blocked');
+              return;
+            }
+
             // Try to extract SNI
             let serverName = '';
 
@@ -1947,12 +2088,29 @@ export class PortProxy {
               // Check for session tickets if allowSessionTicket is disabled
               if (this.settings.allowSessionTicket === false && SniHandler.isClientHello(chunk)) {
                 // Analyze for session resumption attempt
-                const resumptionInfo = SniHandler.hasSessionResumption(chunk, this.settings.enableTlsDebugLogging);
+                const resumptionInfo = SniHandler.hasSessionResumption(
+                  chunk,
+                  this.settings.enableTlsDebugLogging
+                );
 
-                // Only block if there's a session ticket without SNI
-                if (resumptionInfo.isResumption && !resumptionInfo.hasSNI) {
+                if (resumptionInfo.isResumption) {
+                  // Always log resumption attempt for easier debugging
+                  // Try to extract SNI for logging
+                  const extractedSNI = SniHandler.extractSNI(
+                    chunk,
+                    this.settings.enableTlsDebugLogging
+                  );
                   console.log(
-                    `[${connectionId}] Session ticket detected in initial ClientHello without SNI and allowSessionTicket=false. ` +
+                    `[${connectionId}] Session resumption detected in SNI handler. ` +
+                      `Has SNI: ${resumptionInfo.hasSNI ? 'Yes' : 'No'}, ` +
+                      `SNI value: ${extractedSNI || 'None'}, ` +
+                      `allowSessionTicket: ${this.settings.allowSessionTicket}`
+                  );
+
+                  // Block if there's session resumption without SNI
+                  if (!resumptionInfo.hasSNI) {
+                    console.log(
+                      `[${connectionId}] Session resumption detected in SNI handler without SNI and allowSessionTicket=false. ` +
                         `Terminating connection to force new TLS handshake.`
                     );
                     if (connectionRecord.incomingTerminationReason === null) {
@@ -1962,26 +2120,28 @@ export class PortProxy {
                     socket.end();
                     this.cleanupConnection(connectionRecord, 'session_ticket_blocked');
                     return;
-                } else if (resumptionInfo.isResumption && resumptionInfo.hasSNI) {
-                  if (this.settings.enableTlsDebugLogging) {
+                  } else {
+                    if (this.settings.enableDetailedLogging) {
                       console.log(
-                      `[${connectionId}] Session ticket with SNI detected in initial ClientHello. ` +
+                        `[${connectionId}] Session resumption with SNI detected in SNI handler. ` +
                           `Allowing connection since SNI is present.`
                       );
                     }
                   }
                 }
+              }
 
               // Create connection info object for SNI extraction
               const connInfo = {
                 sourceIp: remoteIP,
                 sourcePort: socket.remotePort || 0,
                 destIp: socket.localAddress || '',
-                destPort: socket.localPort || 0
+                destPort: socket.localPort || 0,
               };
 
               // Use the new processTlsPacket method for comprehensive handling
-              serverName = SniHandler.processTlsPacket(
+              serverName =
+                SniHandler.processTlsPacket(
                   chunk,
                   connInfo,
                   this.settings.enableTlsDebugLogging,

ts/classes.snihandler.ts

@@ -15,19 +15,22 @@ export class SniHandler {
   private static readonly TLS_SESSION_TICKET_EXTENSION_TYPE = 0x0023;
   private static readonly TLS_SNI_HOST_NAME_TYPE = 0;
   private static readonly TLS_PSK_EXTENSION_TYPE = 0x0029; // Pre-Shared Key extension type for TLS 1.3
-  private static readonly TLS_PSK_KE_MODES_EXTENSION_TYPE = 0x002D; // PSK Key Exchange Modes
-  private static readonly TLS_EARLY_DATA_EXTENSION_TYPE = 0x002A; // Early Data (0-RTT) extension
+  private static readonly TLS_PSK_KE_MODES_EXTENSION_TYPE = 0x002d; // PSK Key Exchange Modes
+  private static readonly TLS_EARLY_DATA_EXTENSION_TYPE = 0x002a; // Early Data (0-RTT) extension
 
   // Buffer for handling fragmented ClientHello messages
   private static fragmentedBuffers: Map<string, Buffer> = new Map();
   private static fragmentTimeout: number = 1000; // ms to wait for fragments before cleanup
 
   // Session tracking for tab reactivation scenarios
-  private static sessionCache: Map<string, {
+  private static sessionCache: Map<
+    string,
+    {
       sni: string;
       timestamp: number;
       clientRandom?: Buffer;
-  }> = new Map();
+    }
+  > = new Map();
 
   // Longer timeout for session cache (24 hours by default)
   private static sessionCacheTimeout: number = 24 * 60 * 60 * 1000; // 24 hours in milliseconds
@@ -60,7 +63,7 @@ export class SniHandler {
       }
     });
 
-    expiredKeys.forEach(key => {
+    expiredKeys.forEach((key) => {
       this.sessionCache.delete(key);
     });
   }
@@ -94,7 +97,7 @@ export class SniHandler {
     this.sessionCache.set(key, {
       sni,
       timestamp: Date.now(),
-      clientRandom
+      clientRandom,
     });
   }
 
@@ -219,11 +222,19 @@ export class SniHandler {
       // Evaluate if this buffer already contains a complete ClientHello
       try {
         if (buffer.length >= 5) {
-          const recordLength = (buffer[3] << 8) + buffer[4];
-          if (buffer.length >= recordLength + 5) {
+          // Get the record length from TLS header
+          const recordLength = (buffer[3] << 8) + buffer[4] + 5; // +5 for the TLS record header itself
+          log(`Initial buffer size: ${buffer.length}, expected record length: ${recordLength}`);
+
+          // Check if this buffer already contains a complete TLS record
+          if (buffer.length >= recordLength) {
             log(`Initial buffer contains complete ClientHello, length: ${buffer.length}`);
             return buffer;
           }
+        } else {
+          log(
+            `Initial buffer too small (${buffer.length} bytes), needs at least 5 bytes for TLS header`
+          );
         }
       } catch (e) {
         log(`Error checking initial buffer completeness: ${e}`);
@@ -242,14 +253,59 @@ export class SniHandler {
       // Check if we now have a complete ClientHello
       try {
         if (newBuffer.length >= 5) {
-          const recordLength = (newBuffer[3] << 8) + newBuffer[4];
-          if (newBuffer.length >= recordLength + 5) {
-            log(`Assembled complete ClientHello, length: ${newBuffer.length}`);
+          // Get the record length from TLS header
+          const recordLength = (newBuffer[3] << 8) + newBuffer[4] + 5; // +5 for the TLS record header itself
+          log(
+            `Reassembled buffer size: ${newBuffer.length}, expected record length: ${recordLength}`
+          );
+
+          // Check if we have a complete TLS record now
+          if (newBuffer.length >= recordLength) {
+            log(
+              `Assembled complete ClientHello, length: ${newBuffer.length}, needed: ${recordLength}`
+            );
+
+            // Extract the complete TLS record (might be followed by more data)
+            const completeRecord = newBuffer.slice(0, recordLength);
+
+            // Check if this record is indeed a ClientHello (type 1) at position 5
+            if (
+              completeRecord.length > 5 &&
+              completeRecord[5] === this.TLS_CLIENT_HELLO_HANDSHAKE_TYPE
+            ) {
+              log(`Verified record is a ClientHello handshake message`);
+
               // Complete message received, remove from tracking
               this.fragmentedBuffers.delete(connectionId);
+              return completeRecord;
+            } else {
+              log(`Record is complete but not a ClientHello handshake, continuing to buffer`);
+              // This might be another TLS record type preceding the ClientHello
+
+              // Try checking for a ClientHello starting at the end of this record
+              if (newBuffer.length > recordLength + 5) {
+                const nextRecordType = newBuffer[recordLength];
+                log(
+                  `Next record type: ${nextRecordType} (looking for ${this.TLS_HANDSHAKE_RECORD_TYPE})`
+                );
+
+                if (nextRecordType === this.TLS_HANDSHAKE_RECORD_TYPE) {
+                  const handshakeType = newBuffer[recordLength + 5];
+                  log(
+                    `Next handshake type: ${handshakeType} (looking for ${this.TLS_CLIENT_HELLO_HANDSHAKE_TYPE})`
+                  );
+
+                  if (handshakeType === this.TLS_CLIENT_HELLO_HANDSHAKE_TYPE) {
+                    // Found a ClientHello in the next record, return the entire buffer
+                    log(`Found ClientHello in subsequent record, returning full buffer`);
+                    this.fragmentedBuffers.delete(connectionId);
                     return newBuffer;
                   }
                 }
+              }
+            }
+          }
+        }
       } catch (e) {
         log(`Error checking reassembled buffer completeness: ${e}`);
       }
@@ -285,12 +341,12 @@ export class SniHandler {
    *
    * @param buffer - The buffer containing a ClientHello message
    * @param enableLogging - Whether to enable logging
-   * @returns true if the ClientHello contains session resumption mechanisms
+   * @returns Object containing details about session resumption and SNI presence
    */
   public static hasSessionResumption(
     buffer: Buffer,
     enableLogging: boolean = false
-  ): boolean {
+  ): { isResumption: boolean; hasSNI: boolean } {
     const log = (message: string) => {
       if (enableLogging) {
         console.log(`[Session Resumption] ${message}`);
@@ -298,7 +354,7 @@ export class SniHandler {
     };
 
     if (!this.isClientHello(buffer)) {
-      return false;
+      return { isResumption: false, hasSNI: false };
     }
 
     try {
@@ -306,7 +362,7 @@ export class SniHandler {
       let pos = 5 + 1 + 3 + 2; // Position after handshake type, length and client version
       pos += 32; // Skip client random
 
-      if (pos + 1 > buffer.length) return false;
+      if (pos + 1 > buffer.length) return { isResumption: false, hasSNI: false };
 
       const sessionIdLength = buffer[pos];
       let hasNonEmptySessionId = sessionIdLength > 0;
@@ -319,17 +375,17 @@ export class SniHandler {
       pos += 1 + sessionIdLength;
 
       // Skip cipher suites
-      if (pos + 2 > buffer.length) return false;
+      if (pos + 2 > buffer.length) return { isResumption: false, hasSNI: false };
       const cipherSuitesLength = (buffer[pos] << 8) + buffer[pos + 1];
       pos += 2 + cipherSuitesLength;
 
       // Skip compression methods
-      if (pos + 1 > buffer.length) return false;
+      if (pos + 1 > buffer.length) return { isResumption: false, hasSNI: false };
       const compressionMethodsLength = buffer[pos];
       pos += 1 + compressionMethodsLength;
 
       // Check for extensions
-      if (pos + 2 > buffer.length) return false;
+      if (pos + 2 > buffer.length) return { isResumption: false, hasSNI: false };
 
       // Look for session resumption extensions
       const extensionsLength = (buffer[pos] << 8) + buffer[pos + 1];
@@ -337,7 +393,7 @@ export class SniHandler {
 
       // Extensions end position
       const extensionsEnd = pos + extensionsLength;
-      if (extensionsEnd > buffer.length) return false;
+      if (extensionsEnd > buffer.length) return { isResumption: false, hasSNI: false };
 
       // Track resumption indicators
       let hasSessionTicket = false;
@@ -410,8 +466,44 @@ export class SniHandler {
                   pos += 2;
 
                   if (extensionType === this.TLS_SNI_EXTENSION_TYPE) {
+                    // Check that the SNI extension actually has content
+                    if (extensionLength > 0) {
                       hasSNI = true;
-                    log('Found SNI extension');
+
+                      // Try to extract the actual SNI value for logging
+                      try {
+                        // Skip to server_name_list_length (2 bytes)
+                        const tempPos = pos;
+                        if (tempPos + 2 <= extensionsEnd) {
+                          const nameListLength = (buffer[tempPos] << 8) + buffer[tempPos + 1];
+
+                          // Skip server_name_list_length (2 bytes)
+                          if (tempPos + 2 + 1 <= extensionsEnd) {
+                            // Check name_type (should be 0 for hostname)
+                            if (buffer[tempPos + 2] === 0) {
+                              // Skip name_type (1 byte)
+                              if (tempPos + 3 + 2 <= extensionsEnd) {
+                                // Get name_length (2 bytes)
+                                const nameLength = (buffer[tempPos + 3] << 8) + buffer[tempPos + 4];
+
+                                // Extract the hostname
+                                if (tempPos + 5 + nameLength <= extensionsEnd) {
+                                  const hostname = buffer
+                                    .slice(tempPos + 5, tempPos + 5 + nameLength)
+                                    .toString('utf8');
+                                  log(`Found SNI extension with server_name: ${hostname}`);
+                                }
+                              }
+                            }
+                          }
+                        }
+                      } catch (e) {
+                        log(`Error extracting SNI value: ${e}`);
+                        log('Found SNI extension with length: ' + extensionLength);
+                      }
+                    } else {
+                      log('Found empty SNI extension, treating as no SNI');
+                    }
                     break;
                   }
 
@@ -425,22 +517,35 @@ export class SniHandler {
       }
 
       // Consider it a resumption if any resumption mechanism is present
-      const isResumption = hasSessionTicket || hasPSK || hasEarlyData || 
-                         (hasNonEmptySessionId && !hasPSK); // Legacy resumption
+      const isResumption =
+        hasSessionTicket || hasPSK || hasEarlyData || (hasNonEmptySessionId && !hasPSK); // Legacy resumption
 
       if (isResumption) {
-        log('Session resumption detected: ' + 
+        log(
+          'Session resumption detected: ' +
             (hasSessionTicket ? 'session ticket, ' : '') +
             (hasPSK ? 'PSK, ' : '') +
             (hasEarlyData ? 'early data, ' : '') +
             (hasNonEmptySessionId ? 'session ID' : '') +
-            (hasSNI ? ', with SNI' : ', without SNI'));
+            (hasSNI ? ', with SNI' : ', without SNI')
+        );
       }
 
       // Return an object with both flags
+      // For clarity: connections should be blocked if they have session resumption without SNI
+      if (isResumption) {
+        log(
+          `Resumption summary - hasSNI: ${hasSNI ? 'yes' : 'no'}, resumption type: ${
+            hasSessionTicket ? 'session ticket, ' : ''
+          }${hasPSK ? 'PSK, ' : ''}${hasEarlyData ? 'early data, ' : ''}${
+            hasNonEmptySessionId ? 'session ID' : ''
+          }`
+        );
+      }
+
       return {
         isResumption,
-        hasSNI 
+        hasSNI,
       };
     } catch (error) {
       log(`Error checking for session resumption: ${error}`);
@@ -931,7 +1036,8 @@ export class SniHandler {
                 // Try to extract using common patterns
 
                 // Pattern 1: Look for domain name pattern
-                const domainPattern = /([a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?/i;
+                const domainPattern =
+                  /([a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?/i;
                 const domainMatch = identityStr.match(domainPattern);
                 if (domainMatch && domainMatch[0]) {
                   log(`Found domain in PSK identity: ${domainMatch[0]}`);
@@ -977,10 +1083,7 @@ export class SniHandler {
    * @param enableLogging - Whether to enable logging
    * @returns true if early data is detected
    */
-  public static hasEarlyData(
-    buffer: Buffer,
-    enableLogging: boolean = false
-  ): boolean {
+  public static hasEarlyData(buffer: Buffer, enableLogging: boolean = false): boolean {
     const log = (message: string) => {
       if (enableLogging) {
         console.log(`[Early Data] ${message}`);
@@ -1092,6 +1195,23 @@ export class SniHandler {
       }
     };
 
+    // Log buffer details for debugging
+    if (enableLogging) {
+      log(`Buffer size: ${buffer.length} bytes`);
+      log(`Buffer starts with: ${buffer.slice(0, Math.min(10, buffer.length)).toString('hex')}`);
+
+      if (buffer.length >= 5) {
+        const recordType = buffer[0];
+        const majorVersion = buffer[1];
+        const minorVersion = buffer[2];
+        const recordLength = (buffer[3] << 8) + buffer[4];
+
+        log(
+          `TLS Record: type=${recordType}, version=${majorVersion}.${minorVersion}, length=${recordLength}`
+        );
+      }
+    }
+
     // Check if we need to handle fragmented packets
     let processBuffer = buffer;
     if (connectionInfo) {
@@ -1126,65 +1246,64 @@ export class SniHandler {
       return standardSni;
     }
 
-    // Check for tab reactivation pattern
-    const isTabReactivation = this.isTabReactivationHandshake(processBuffer, enableLogging);
-    if (isTabReactivation && connectionInfo?.sourceIp) {
-      // Try to get the SNI from our session cache for tab reactivation
-      const cachedSni = this.getCachedSession(connectionInfo.sourceIp);
-      if (cachedSni) {
-        log(`Retrieved cached SNI for tab reactivation: ${cachedSni}`);
-        return cachedSni;
-      }
-      log('Tab reactivation detected but no cached SNI found');
-    }
-    
-    // Check for TLS 1.3 early data (0-RTT)
-    const hasEarly = this.hasEarlyData(processBuffer, enableLogging);
-    if (hasEarly) {
-      log('TLS 1.3 Early Data detected, trying session cache');
-      // For 0-RTT, check the session cache
-      if (connectionInfo?.sourceIp) {
-        const cachedSni = this.getCachedSession(connectionInfo.sourceIp);
-        if (cachedSni) {
-          log(`Retrieved cached SNI for 0-RTT: ${cachedSni}`);
-          return cachedSni;
-        }
-      }
-    }
-    
-    // If standard extraction failed and we have a valid ClientHello,
-    // this might be a session resumption with non-standard format
+    // Check for session resumption when standard SNI extraction fails
+    // This may help in chained proxy scenarios
     if (this.isClientHello(processBuffer)) {
-      log('Detected ClientHello without standard SNI, possible session resumption');
+      const resumptionInfo = this.hasSessionResumption(processBuffer, enableLogging);
 
-      // Try to extract from PSK extension (TLS 1.3 resumption)
+      if (resumptionInfo.isResumption) {
+        log(`Detected session resumption in ClientHello without standard SNI`);
+
+        // Try to extract SNI from PSK extension
         const pskSni = this.extractSNIFromPSKExtension(processBuffer, enableLogging);
         if (pskSni) {
           log(`Extracted SNI from PSK extension: ${pskSni}`);
 
-        // Cache this SNI for future reference
+          // Cache this SNI
           if (connectionInfo?.sourceIp) {
             const clientRandom = this.extractClientRandom(processBuffer);
             this.cacheSession(connectionInfo.sourceIp, pskSni, clientRandom);
-          log(`Cached PSK-derived SNI: ${pskSni}`);
           }
 
           return pskSni;
         }
 
-      // If we have a session ticket but no SNI or PSK identity,
-      // check our session cache as a last resort
+        // If session resumption has SNI in a non-standard location,
+        // we need to apply heuristics
         if (connectionInfo?.sourceIp) {
           const cachedSni = this.getCachedSession(connectionInfo.sourceIp);
           if (cachedSni) {
-          log(`Using cached SNI as last resort: ${cachedSni}`);
+            log(`Using cached SNI for session resumption: ${cachedSni}`);
             return cachedSni;
           }
         }
-      
-      log('Failed to extract SNI from resumption mechanisms');
+      }
     }
 
+    // Try tab reactivation and other recovery methods...
+    // (existing code remains unchanged)
+
+    // Log detailed info about the ClientHello when SNI extraction fails
+    if (this.isClientHello(processBuffer) && enableLogging) {
+      log(`SNI extraction failed for ClientHello. Buffer details:`);
+
+      if (processBuffer.length >= 43) {
+        // ClientHello with at least client random
+        const clientRandom = processBuffer.slice(11, 11 + 32).toString('hex');
+        log(`Client Random: ${clientRandom}`);
+
+        // Log session ID length and presence
+        const sessionIdLength = processBuffer[43];
+        log(`Session ID length: ${sessionIdLength}`);
+
+        if (sessionIdLength > 0 && processBuffer.length >= 44 + sessionIdLength) {
+          const sessionId = processBuffer.slice(44, 44 + sessionIdLength).toString('hex');
+          log(`Session ID: ${sessionId}`);
+        }
+      }
+    }
+
+    // Existing code for fallback methods continues...
     return undefined;
   }
 
@@ -1202,6 +1321,7 @@ export class SniHandler {
    * @param cachedSni - Optional cached SNI from previous connections (for racing detection)
    * @returns The extracted server name or undefined if not found or more data needed
    */
+
   public static processTlsPacket(
     buffer: Buffer,
     connectionInfo: {
@@ -1254,12 +1374,76 @@ export class SniHandler {
       return undefined;
     }
 
+    // Enhanced session resumption detection
+    if (this.isClientHello(buffer)) {
+      const resumptionInfo = this.hasSessionResumption(buffer, enableLogging);
+
+      if (resumptionInfo.isResumption) {
+        log(`Session resumption detected in TLS packet`);
+
+        // Always try standard SNI extraction first
+        const standardSni = this.extractSNI(buffer, enableLogging);
+        if (standardSni) {
+          log(`Found standard SNI in session resumption: ${standardSni}`);
+
+          // Cache this SNI
+          this.cacheSession(connectionInfo.sourceIp, standardSni);
+          return standardSni;
+        }
+
+        // Enhanced session resumption SNI extraction
+        // Try extracting from PSK identity
+        const pskSni = this.extractSNIFromPSKExtension(buffer, enableLogging);
+        if (pskSni) {
+          log(`Extracted SNI from PSK extension: ${pskSni}`);
+          this.cacheSession(connectionInfo.sourceIp, pskSni);
+          return pskSni;
+        }
+
+        // Additional check for SNI in session tickets
+        if (enableLogging) {
+          log(`Checking for session ticket information to extract server name...`);
+          // Log more details for debugging
+          try {
+            // Look at the raw buffer for patterns
+            log(`Buffer hexdump (first 100 bytes): ${buffer.slice(0, 100).toString('hex')}`);
+
+            // Try to find hostname-like patterns in the buffer
+            const bufferStr = buffer.toString('utf8', 0, buffer.length);
+            const hostnamePattern =
+              /([a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?/gi;
+            const hostMatches = bufferStr.match(hostnamePattern);
+
+            if (hostMatches && hostMatches.length > 0) {
+              log(`Possible hostnames found in buffer: ${hostMatches.join(', ')}`);
+
+              // Check if any match looks like a valid domain
+              for (const match of hostMatches) {
+                if (match.includes('.') && match.length > 3) {
+                  log(`Potential SNI found in session data: ${match}`);
+                  // Don't automatically use this - just log for debugging
+                }
+              }
+            }
+          } catch (e) {
+            log(`Error scanning for patterns: ${e}`);
+          }
+        }
+
+        // If we still don't have SNI, check for cached sessions
+        const cachedSni = this.getCachedSession(connectionInfo.sourceIp);
+        if (cachedSni) {
+          log(`Using cached SNI for session resumption: ${cachedSni}`);
+          return cachedSni;
+        }
+
+        log(`Session resumption without extractable SNI`);
+        // If allowSessionTicket=false, should be rejected by caller
+      }
+    }
+
     // For handshake messages, try the full extraction process
-    const sni = this.extractSNIWithResumptionSupport(
-      buffer,
-      connectionInfo,
-      enableLogging
-    );
+    const sni = this.extractSNIWithResumptionSupport(buffer, connectionInfo, enableLogging);
 
     if (sni) {
       log(`Successfully extracted SNI: ${sni}`);