feat(vpn): allow target profiles to grant non-vpnOnly routes by live client source IP

ts/classes.dcrouter.ts

@@ -2421,6 +2421,7 @@ export class DcRouter {
         routeId,
         this.vpnManager.listClients(),
         this.routeConfigManager?.getRoutes() || new Map(),
+        this.vpnManager.getClientSourceIpMap(),
       );
     };
   }
@@ -2458,11 +2459,16 @@ export class DcRouter {
           logger.log('warn', `Failed to re-apply routes after VPN client change: ${err?.message || err}`);
         });
       },
+      onClientSourceIpsChanged: () => {
+        this.routeConfigManager?.applyRoutes().catch((err) => {
+          logger.log('warn', `Failed to re-apply routes after VPN client source IP change: ${err?.message || err}`);
+        });
+      },
       getClientDirectTargets: (targetProfileIds: string[]) => {
         if (!this.targetProfileManager) return [];
         return this.targetProfileManager.getDirectTargetIps(targetProfileIds);
       },
-      getClientAllowedIPs: async (targetProfileIds: string[]) => {
+      getClientAllowedIPs: async (targetProfileIds: string[], clientId?: string, sourceIp?: string) => {
         const subnet = this.options.vpnConfig?.subnet || '10.8.0.0/24';
         const ips = new Set<string>([subnet]);
 
@@ -2471,7 +2477,9 @@ export class DcRouter {
         const allRoutes = this.routeConfigManager?.getRoutes() || new Map();
 
         const { domains, targetIps } = this.targetProfileManager.getClientAccessSpec(
-          targetProfileIds, allRoutes,
+          targetProfileIds,
+          allRoutes,
+          sourceIp,
         );
 
         // Add target IPs directly

ts/config/classes.target-profile-manager.ts

@@ -5,6 +5,8 @@ import type { ITargetProfile, ITargetProfileTarget } from '../../ts_interfaces/d
 import type { IDcRouterRouteConfig } from '../../ts_interfaces/data/remoteingress.js';
 import type { IRoute } from '../../ts_interfaces/data/route-management.js';
 
+type TIpAllowEntry = string | { ip: string; domains?: string[] };
+
 /**
  * Manages TargetProfiles (target-side: what can be accessed).
  * TargetProfiles define what resources a VPN client can reach:
@@ -35,6 +37,7 @@ export class TargetProfileManager {
     domains?: string[];
     targets?: ITargetProfileTarget[];
     routeRefs?: string[];
+    allowRoutesByClientSourceIp?: boolean;
     createdBy: string;
   }): Promise<string> {
     // Enforce unique profile names
@@ -55,6 +58,7 @@ export class TargetProfileManager {
       domains: data.domains,
       targets: data.targets,
       routeRefs,
+      allowRoutesByClientSourceIp: data.allowRoutesByClientSourceIp === true,
       createdAt: now,
       updatedAt: now,
       createdBy: data.createdBy,
@@ -88,6 +92,9 @@ export class TargetProfileManager {
     if (patch.domains !== undefined) profile.domains = patch.domains;
     if (patch.targets !== undefined) profile.targets = patch.targets;
     if (patch.routeRefs !== undefined) profile.routeRefs = this.normalizeRouteRefs(patch.routeRefs);
+    if (patch.allowRoutesByClientSourceIp !== undefined) {
+      profile.allowRoutesByClientSourceIp = patch.allowRoutesByClientSourceIp === true;
+    }
     profile.updatedAt = Date.now();
 
     await this.persistProfile(profile);
@@ -208,13 +215,15 @@ export class TargetProfileManager {
    *
    * Entries are domain-scoped when a profile matches via specific domains that are
    * a subset of the route's wildcard. Plain IPs are returned for routeRef/target matches
-   * or when profile domains exactly equal the route's domains.
+   * or when profile domains exactly equal the route's domains. Profiles can also opt
+   * into source-IP matching against non-vpnOnly route security.
    */
   public getMatchingClientIps(
     route: IDcRouterRouteConfig,
     routeId: string | undefined,
     clients: VpnClientDoc[],
     allRoutes: Map<string, IRoute> = new Map(),
+    clientSourceIps: Map<string, string> = new Map(),
   ): Array<string | { ip: string; domains: string[] }> {
     const entries: Array<string | { ip: string; domains: string[] }> = [];
     const routeDomains = this.getRouteDomains(route);
@@ -227,6 +236,7 @@ export class TargetProfileManager {
       // Collect scoped domains from all matching profiles for this client
       let fullAccess = false;
       const scopedDomains = new Set<string>();
+      const clientSourceIp = clientSourceIps.get(client.clientId);
 
       for (const profileId of client.targetProfileIds) {
         const profile = this.profiles.get(profileId);
@@ -246,6 +256,16 @@ export class TargetProfileManager {
         if (matchResult !== 'none') {
           for (const d of matchResult.domains) scopedDomains.add(d);
         }
+
+        if (
+          !route.vpnOnly
+          && profile.allowRoutesByClientSourceIp === true
+          && clientSourceIp
+          && this.routeAllowsSourceIp(route, clientSourceIp, routeDomains)
+        ) {
+          fullAccess = true;
+          break;
+        }
       }
 
       if (fullAccess) {
@@ -265,6 +285,7 @@ export class TargetProfileManager {
   public getClientAccessSpec(
     targetProfileIds: string[],
     allRoutes: Map<string, IRoute>,
+    clientSourceIp?: string,
   ): { domains: string[]; targetIps: string[] } {
     const domains = new Set<string>();
     const targetIps = new Set<string>();
@@ -292,13 +313,20 @@ export class TargetProfileManager {
       // Route references: scan all routes
       for (const [routeId, route] of allRoutes) {
         if (!route.enabled) continue;
-        if (this.routeMatchesProfile(
-          route.route as IDcRouterRouteConfig,
+        const dcRoute = route.route as IDcRouterRouteConfig;
+        const routeDomains = this.getRouteDomains(dcRoute);
+        const profileMatchesRoute = this.routeMatchesProfile(
+          dcRoute,
           routeId,
           profile,
           routeNameIndex,
-        )) {
-          for (const d of this.getRouteDomains(route.route as IDcRouterRouteConfig)) {
+        );
+        const sourceIpMatchesRoute = profile.allowRoutesByClientSourceIp === true
+          && clientSourceIp
+          && !dcRoute.vpnOnly
+          && this.routeAllowsSourceIp(dcRoute, clientSourceIp, routeDomains);
+        if (profileMatchesRoute || sourceIpMatchesRoute) {
+          for (const d of routeDomains) {
             domains.add(d);
           }
         }
@@ -422,6 +450,199 @@ export class TargetProfileManager {
     return false;
   }
 
+  private routeAllowsSourceIp(
+    route: IDcRouterRouteConfig,
+    sourceIp: string,
+    routeDomains: string[],
+  ): boolean {
+    const security = (route as any).security;
+    const ipAllowList = this.normalizeIpEntries(security?.ipAllowList);
+    const ipBlockList = this.normalizeIpEntries(security?.ipBlockList);
+
+    if (this.ipEntriesMatchSource(ipBlockList, sourceIp, routeDomains)) {
+      return false;
+    }
+
+    if (!ipAllowList.length) {
+      return true;
+    }
+
+    return this.ipEntriesMatchSource(ipAllowList, sourceIp, routeDomains);
+  }
+
+  private normalizeIpEntries(entries: unknown): TIpAllowEntry[] {
+    if (!entries) return [];
+    if (Array.isArray(entries)) return entries as TIpAllowEntry[];
+    return [entries as TIpAllowEntry];
+  }
+
+  private ipEntriesMatchSource(
+    entries: TIpAllowEntry[],
+    sourceIp: string,
+    routeDomains: string[],
+  ): boolean {
+    return entries.some((entry) => this.ipEntryMatchesSource(entry, sourceIp, routeDomains));
+  }
+
+  private ipEntryMatchesSource(
+    entry: TIpAllowEntry,
+    sourceIp: string,
+    routeDomains: string[],
+  ): boolean {
+    const ipPattern = typeof entry === 'string' ? entry : entry.ip;
+    if (typeof ipPattern !== 'string') return false;
+    if (!this.ipPatternMatchesSource(ipPattern, sourceIp)) {
+      return false;
+    }
+
+    if (typeof entry === 'string' || !entry.domains?.length) {
+      return true;
+    }
+
+    if (!routeDomains.length) {
+      return false;
+    }
+
+    return routeDomains.some((routeDomain) =>
+      entry.domains!.some((entryDomain) =>
+        this.domainMatchesPattern(routeDomain, entryDomain)
+        || this.domainMatchesPattern(entryDomain, routeDomain),
+      ),
+    );
+  }
+
+  private ipPatternMatchesSource(pattern: string, sourceIp: string): boolean {
+    const trimmedPattern = pattern.trim();
+    const trimmedSourceIp = sourceIp.trim();
+    if (!trimmedPattern || !trimmedSourceIp) return false;
+    if (trimmedPattern === '*') return true;
+    if (trimmedPattern === trimmedSourceIp) return true;
+
+    if (trimmedPattern.includes('/')) {
+      return this.ipMatchesCidr(trimmedSourceIp, trimmedPattern);
+    }
+
+    if (trimmedPattern.includes('-')) {
+      return this.ipMatchesRange(trimmedSourceIp, trimmedPattern);
+    }
+
+    if (trimmedPattern.includes('*')) {
+      return this.ipMatchesWildcard(trimmedSourceIp, trimmedPattern);
+    }
+
+    return false;
+  }
+
+  private ipMatchesCidr(sourceIp: string, cidr: string): boolean {
+    const [networkIp, prefixString] = cidr.split('/');
+    if (!networkIp || !prefixString) return false;
+    const source = this.ipToComparable(sourceIp);
+    const network = this.ipToComparable(networkIp);
+    const prefix = Number(prefixString);
+    if (!source || !network || source.version !== network.version) return false;
+
+    const bitCount = source.version === 4 ? 32 : 128;
+    if (!Number.isInteger(prefix) || prefix < 0 || prefix > bitCount) return false;
+    if (prefix === 0) return true;
+
+    const shift = BigInt(bitCount - prefix);
+    return (source.value >> shift) === (network.value >> shift);
+  }
+
+  private ipMatchesRange(sourceIp: string, range: string): boolean {
+    const [startIp, endIp] = range.split('-').map((part) => part.trim());
+    if (!startIp || !endIp) return false;
+    const source = this.ipToComparable(sourceIp);
+    const start = this.ipToComparable(startIp);
+    const end = this.ipToComparable(endIp);
+    if (!source || !start || !end) return false;
+    if (source.version !== start.version || source.version !== end.version) return false;
+    return source.value >= start.value && source.value <= end.value;
+  }
+
+  private ipMatchesWildcard(sourceIp: string, pattern: string): boolean {
+    const sourceParts = sourceIp.split('.');
+    const patternParts = pattern.split('.');
+    if (sourceParts.length !== 4 || patternParts.length !== 4) return false;
+
+    return patternParts.every((patternPart, index) => {
+      if (patternPart === '*') return true;
+      return patternPart === sourceParts[index];
+    });
+  }
+
+  private ipToComparable(ip: string): { version: 4 | 6; value: bigint } | undefined {
+    const normalizedIp = this.normalizeIpLiteral(ip);
+    const ipVersion = plugins.net.isIP(normalizedIp);
+    if (ipVersion === 4) {
+      const parts = normalizedIp.split('.').map((part) => Number(part));
+      if (parts.length !== 4 || parts.some((part) => !Number.isInteger(part) || part < 0 || part > 255)) {
+        return undefined;
+      }
+      return {
+        version: 4,
+        value: parts.reduce((value, part) => (value << 8n) + BigInt(part), 0n),
+      };
+    }
+
+    if (ipVersion === 6) {
+      const parts = this.expandIpv6(normalizedIp);
+      if (!parts) return undefined;
+      return {
+        version: 6,
+        value: parts.reduce((value, part) => (value << 16n) + BigInt(part), 0n),
+      };
+    }
+
+    return undefined;
+  }
+
+  private normalizeIpLiteral(ip: string): string {
+    const trimmed = ip.trim().replace(/^\[|\]$/g, '');
+    const zoneIndex = trimmed.indexOf('%');
+    const withoutZone = zoneIndex === -1 ? trimmed : trimmed.slice(0, zoneIndex);
+    const ipv4MappedPrefix = '::ffff:';
+    if (withoutZone.toLowerCase().startsWith(ipv4MappedPrefix)) {
+      const mappedIpv4 = withoutZone.slice(ipv4MappedPrefix.length);
+      if (plugins.net.isIP(mappedIpv4) === 4) return mappedIpv4;
+    }
+    return withoutZone;
+  }
+
+  private expandIpv6(ip: string): number[] | undefined {
+    let normalizedIp = ip.toLowerCase();
+    if (normalizedIp.includes('.')) {
+      const lastColonIndex = normalizedIp.lastIndexOf(':');
+      const ipv4Part = normalizedIp.slice(lastColonIndex + 1);
+      const ipv4Comparable = this.ipToComparable(ipv4Part);
+      if (!ipv4Comparable || ipv4Comparable.version !== 4) return undefined;
+      const high = Number((ipv4Comparable.value >> 16n) & 0xffffn).toString(16);
+      const low = Number(ipv4Comparable.value & 0xffffn).toString(16);
+      normalizedIp = `${normalizedIp.slice(0, lastColonIndex)}:${high}:${low}`;
+    }
+
+    const doubleColonParts = normalizedIp.split('::');
+    if (doubleColonParts.length > 2) return undefined;
+
+    const head = doubleColonParts[0] ? doubleColonParts[0].split(':') : [];
+    const tail = doubleColonParts[1] ? doubleColonParts[1].split(':') : [];
+    const missingCount = 8 - head.length - tail.length;
+    if (missingCount < 0 || (doubleColonParts.length === 1 && missingCount !== 0)) return undefined;
+
+    const parts = [
+      ...head,
+      ...Array(missingCount).fill('0'),
+      ...tail,
+    ];
+    if (parts.length !== 8) return undefined;
+
+    const numbers = parts.map((part) => Number.parseInt(part || '0', 16));
+    if (numbers.some((part) => !Number.isInteger(part) || part < 0 || part > 0xffff)) {
+      return undefined;
+    }
+    return numbers;
+  }
+
   private getRouteDomains(route: IDcRouterRouteConfig): string[] {
     const domains = (route.match as any)?.domains;
     if (!domains) return [];
@@ -503,6 +724,7 @@ export class TargetProfileManager {
           domains: doc.domains,
           targets: doc.targets,
           routeRefs: doc.routeRefs,
+          allowRoutesByClientSourceIp: doc.allowRoutesByClientSourceIp === true,
           createdAt: doc.createdAt,
           updatedAt: doc.updatedAt,
           createdBy: doc.createdBy,
@@ -522,6 +744,7 @@ export class TargetProfileManager {
       existingDoc.domains = profile.domains;
       existingDoc.targets = profile.targets;
       existingDoc.routeRefs = profile.routeRefs;
+      existingDoc.allowRoutesByClientSourceIp = profile.allowRoutesByClientSourceIp === true;
       existingDoc.updatedAt = profile.updatedAt;
       await existingDoc.save();
     } else {
@@ -532,6 +755,7 @@ export class TargetProfileManager {
       doc.domains = profile.domains;
       doc.targets = profile.targets;
       doc.routeRefs = profile.routeRefs;
+      doc.allowRoutesByClientSourceIp = profile.allowRoutesByClientSourceIp === true;
       doc.createdAt = profile.createdAt;
       doc.updatedAt = profile.updatedAt;
       doc.createdBy = profile.createdBy;

ts/db/documents/classes.target-profile.doc.ts

@@ -25,6 +25,9 @@ export class TargetProfileDoc extends plugins.smartdata.SmartDataDbDoc<TargetPro
   @plugins.smartdata.svDb()
   public routeRefs?: string[];
 
+  @plugins.smartdata.svDb()
+  public allowRoutesByClientSourceIp?: boolean;
+
   @plugins.smartdata.svDb()
   public createdAt!: number;
 

ts/opsserver/handlers/target-profile.handler.ts

@@ -69,6 +69,7 @@ export class TargetProfileHandler {
             domains: dataArg.domains,
             targets: dataArg.targets,
             routeRefs: dataArg.routeRefs,
+            allowRoutesByClientSourceIp: dataArg.allowRoutesByClientSourceIp,
             createdBy: userId,
           });
           await this.opsServerRef.dcRouterRef.routeConfigManager?.applyRoutes();
@@ -94,6 +95,7 @@ export class TargetProfileHandler {
             domains: dataArg.domains,
             targets: dataArg.targets,
             routeRefs: dataArg.routeRefs,
+            allowRoutesByClientSourceIp: dataArg.allowRoutesByClientSourceIp,
           });
           // Re-apply routes and refresh VPN client security to update access
           await this.opsServerRef.dcRouterRef.routeConfigManager?.applyRoutes();

ts/opsserver/handlers/vpn.handler.ts

@@ -102,6 +102,8 @@ export class VpnHandler {
               bytesSent: c.bytesSent,
               bytesReceived: c.bytesReceived,
               transport: c.transportType,
+              remoteAddr: c.remoteAddr,
+              sourceIp: manager.getClientSourceIp(c.registeredClientId || c.clientId),
             })),
           };
         },

ts/vpn/classes.vpn-manager.ts

@@ -19,6 +19,10 @@ export interface IVpnManagerConfig {
   }>;
   /** Called when clients are created/deleted/toggled — triggers route re-application */
   onClientChanged?: () => void;
+  /** Called when a live VPN client's real source IP changes. */
+  onClientSourceIpsChanged?: () => void;
+  /** Poll interval for live VPN client real source IP updates. Default: 10 seconds. */
+  clientSourceIpPollIntervalMs?: number;
   /** Destination routing policy override. Default: forceTarget to 127.0.0.1 */
   destinationPolicy?: {
     default: 'forceTarget' | 'block' | 'allow';
@@ -29,7 +33,7 @@ export interface IVpnManagerConfig {
   /** Compute per-client AllowedIPs based on the client's target profile IDs.
    *  Called at config generation time (create/export). Returns CIDRs for WireGuard AllowedIPs.
    *  When not set, defaults to [subnet]. */
-  getClientAllowedIPs?: (targetProfileIds: string[]) => Promise<string[]>;
+  getClientAllowedIPs?: (targetProfileIds: string[], clientId?: string, sourceIp?: string) => Promise<string[]>;
   /** Resolve per-client destination allow-list IPs from target profile IDs.
    *  Returns IP strings that should bypass forceTarget and go direct to the real destination. */
   getClientDirectTargets?: (targetProfileIds: string[]) => string[];
@@ -57,6 +61,9 @@ export class VpnManager {
   private serverKeys?: VpnServerKeysDoc;
   private resolvedForwardingMode?: 'socket' | 'bridge' | 'hybrid';
   private forwardingModeOverride?: 'socket' | 'bridge' | 'hybrid';
+  private clientSourceIps = new Map<string, string>();
+  private clientSourceIpPollTimer?: ReturnType<typeof setInterval>;
+  private clientSourceIpRefreshInFlight = false;
 
   constructor(config: IVpnManagerConfig) {
     this.config = config;
@@ -173,6 +180,9 @@ export class VpnManager {
       }
     }
 
+    await this.refreshClientSourceIps(false);
+    this.startClientSourceIpPolling();
+
     logger.log('info', `VPN server started: subnet=${subnet}, wg=:${wgListenPort}, clients=${this.clients.size}`);
   }
 
@@ -180,6 +190,7 @@ export class VpnManager {
    * Stop the VPN server.
    */
   public async stop(): Promise<void> {
+    this.stopClientSourceIpPolling();
     if (this.vpnServer) {
       try {
         await this.vpnServer.stopServer();
@@ -189,6 +200,11 @@ export class VpnManager {
       await this.vpnServer.stop();
       this.vpnServer = undefined;
     }
+    const hadClientSourceIps = this.clientSourceIps.size > 0;
+    this.clientSourceIps.clear();
+    if (hadClientSourceIps) {
+      this.config.onClientSourceIpsChanged?.();
+    }
     this.resolvedForwardingMode = undefined;
     logger.log('info', 'VPN server stopped');
   }
@@ -246,6 +262,7 @@ export class VpnManager {
     bundle.wireguardConfig = await this.rewriteWireGuardAllowedIPs(
       bundle.wireguardConfig,
       doc.targetProfileIds || [],
+      doc.clientId,
     );
 
     // Persist client entry (including WG private key for export/QR)
@@ -287,6 +304,7 @@ export class VpnManager {
     await this.vpnServer.removeClient(clientId);
     const doc = this.clients.get(clientId);
     this.clients.delete(clientId);
+    this.clientSourceIps.delete(clientId);
     if (doc) {
       await doc.delete();
     }
@@ -328,6 +346,7 @@ export class VpnManager {
       client.updatedAt = Date.now();
       await this.persistClient(client);
     }
+    this.clientSourceIps.delete(clientId);
     this.config.onClientChanged?.();
   }
 
@@ -380,6 +399,7 @@ export class VpnManager {
     bundle.wireguardConfig = await this.rewriteWireGuardAllowedIPs(
       bundle.wireguardConfig,
       client?.targetProfileIds || [],
+      clientId,
     );
 
     // Update persisted entry with new keys (including private key for export/QR)
@@ -413,7 +433,11 @@ export class VpnManager {
         );
       }
 
-      config = await this.rewriteWireGuardAllowedIPs(config, persisted?.targetProfileIds || []);
+      config = await this.rewriteWireGuardAllowedIPs(
+        config,
+        persisted?.targetProfileIds || [],
+        clientId,
+      );
     }
 
     return config;
@@ -445,6 +469,107 @@ export class VpnManager {
     return this.vpnServer.listClients();
   }
 
+  public getClientSourceIp(clientId: string): string | undefined {
+    return this.clientSourceIps.get(clientId);
+  }
+
+  public getClientSourceIpMap(): Map<string, string> {
+    return new Map(this.clientSourceIps);
+  }
+
+  public async refreshClientSourceIps(notifyOnChange = true): Promise<boolean> {
+    if (!this.vpnServer || this.clientSourceIpRefreshInFlight) {
+      return false;
+    }
+
+    this.clientSourceIpRefreshInFlight = true;
+    try {
+      const connectedClients = await this.vpnServer.listClients();
+      const nextSourceIps = new Map<string, string>();
+      const wireguardClientIds = new Set<string>();
+
+      for (const connectedClient of connectedClients) {
+        const clientId = connectedClient.registeredClientId || connectedClient.clientId;
+        if (!clientId) continue;
+        if (connectedClient.transportType === 'wireguard') {
+          wireguardClientIds.add(clientId);
+        }
+
+        const sourceIp = VpnManager.normalizeRemoteAddress(connectedClient.remoteAddr);
+        if (sourceIp) {
+          nextSourceIps.set(clientId, sourceIp);
+        }
+      }
+
+      if (wireguardClientIds.size > 0 && typeof (this.vpnServer as any).listWgPeers === 'function') {
+        try {
+          const wgPeers = await this.vpnServer.listWgPeers();
+          const endpointByPublicKey = new Map<string, string>();
+          for (const peer of wgPeers) {
+            const endpointIp = VpnManager.normalizeRemoteAddress(peer.endpoint);
+            if (peer.publicKey && endpointIp) {
+              endpointByPublicKey.set(peer.publicKey, endpointIp);
+            }
+          }
+
+          for (const client of this.clients.values()) {
+            if (nextSourceIps.has(client.clientId)) continue;
+            if (!wireguardClientIds.has(client.clientId)) continue;
+            if (!client.wgPublicKey) continue;
+            const endpointIp = endpointByPublicKey.get(client.wgPublicKey);
+            if (endpointIp) {
+              nextSourceIps.set(client.clientId, endpointIp);
+            }
+          }
+        } catch (err) {
+          logger.log('warn', `VPN: Failed to refresh WireGuard peer endpoints: ${(err as Error).message}`);
+        }
+      }
+
+      if (this.sameSourceIpMap(this.clientSourceIps, nextSourceIps)) {
+        return false;
+      }
+
+      this.clientSourceIps = nextSourceIps;
+      if (notifyOnChange) {
+        this.config.onClientSourceIpsChanged?.();
+      }
+      return true;
+    } catch (err) {
+      logger.log('warn', `VPN: Failed to refresh client source IPs: ${(err as Error).message}`);
+      return false;
+    } finally {
+      this.clientSourceIpRefreshInFlight = false;
+    }
+  }
+
+  public static normalizeRemoteAddress(remoteAddress?: string): string | undefined {
+    const remoteAddressString = remoteAddress?.trim();
+    if (!remoteAddressString) return undefined;
+
+    if (remoteAddressString.startsWith('[')) {
+      const closingBracketIndex = remoteAddressString.indexOf(']');
+      if (closingBracketIndex > 0) {
+        const bracketedIp = remoteAddressString.slice(1, closingBracketIndex);
+        return plugins.net.isIP(bracketedIp) ? bracketedIp : undefined;
+      }
+    }
+
+    if (plugins.net.isIP(remoteAddressString)) {
+      return remoteAddressString;
+    }
+
+    const lastColonIndex = remoteAddressString.lastIndexOf(':');
+    if (lastColonIndex > -1 && remoteAddressString.indexOf(':') === lastColonIndex) {
+      const host = remoteAddressString.slice(0, lastColonIndex);
+      if (plugins.net.isIP(host)) {
+        return host;
+      }
+    }
+
+    return undefined;
+  }
+
   /**
    * Get telemetry for a specific client.
    */
@@ -533,10 +658,15 @@ export class VpnManager {
   private async rewriteWireGuardAllowedIPs(
     wireguardConfig: string,
     targetProfileIds: string[],
+    clientId?: string,
   ): Promise<string> {
     if (!this.config.getClientAllowedIPs) return wireguardConfig;
 
-    const allowedIPs = await this.config.getClientAllowedIPs(targetProfileIds);
+    const allowedIPs = await this.config.getClientAllowedIPs(
+      targetProfileIds,
+      clientId,
+      clientId ? this.getClientSourceIp(clientId) : undefined,
+    );
     const effectiveAllowedIPs = allowedIPs.length ? allowedIPs : [this.getSubnet()];
     const allowedLine = `AllowedIPs = ${effectiveAllowedIPs.join(', ')}`;
 
@@ -587,6 +717,31 @@ export class VpnManager {
     }
   }
 
+  private startClientSourceIpPolling(): void {
+    this.stopClientSourceIpPolling();
+    const pollIntervalMs = Math.max(1000, this.config.clientSourceIpPollIntervalMs ?? 10_000);
+    this.clientSourceIpPollTimer = setInterval(() => {
+      void this.refreshClientSourceIps().catch((err) => {
+        logger.log('warn', `VPN: Client source IP polling failed: ${err?.message || err}`);
+      });
+    }, pollIntervalMs);
+    this.clientSourceIpPollTimer.unref?.();
+  }
+
+  private stopClientSourceIpPolling(): void {
+    if (!this.clientSourceIpPollTimer) return;
+    clearInterval(this.clientSourceIpPollTimer);
+    this.clientSourceIpPollTimer = undefined;
+  }
+
+  private sameSourceIpMap(left: Map<string, string>, right: Map<string, string>): boolean {
+    if (left.size !== right.size) return false;
+    for (const [clientId, sourceIp] of left) {
+      if (right.get(clientId) !== sourceIp) return false;
+    }
+    return true;
+  }
+
   private getResolvedForwardingMode(): 'socket' | 'bridge' | 'hybrid' {
     return this.resolvedForwardingMode
       ?? this.forwardingModeOverride