diff --git a/apps/server/src/config.ts b/apps/server/src/config.ts
index b0aa02e..4590008 100644
--- a/apps/server/src/config.ts
+++ b/apps/server/src/config.ts
@@ -30,7 +30,15 @@ export const config = {
   minPasswordLength: 8,
   /** Maximum registrations allowed from the same IP (permanent, DB-level) */
   maxRegistrationsPerIp: Number(process.env.MAX_REGISTRATIONS_PER_IP) || 2,
+  /** TURN server URL (e.g. turn:openrelay.metered.ca:80) */
+  turnUrl: process.env.TURN_URL || '',
+  /** FOR DYNAMIC AUTH: Shared secret (coturn / metered.ca) */
+  turnSecret: process.env.TURN_SECRET || '',
+  /** FOR STATIC AUTH: Username */
+  turnUsername: process.env.TURN_USERNAME || '',
+  /** FOR STATIC AUTH: Password */
+  turnPassword: process.env.TURN_PASSWORD || '',
   /** STUN server URLs */
-  stunUrls: (process.env.STUN_URLS || 'stun:stun.yandex.ru:3478,stun:stun.sipnet.net:3478,stun:stun.l.google.com:19302,stun:stun.voip.aebc.com:3478,stun:stun.stunprotocol.org:3478')
+  stunUrls: (process.env.STUN_URLS || 'stun:stun.yandex.ru:3478,stun:stun.mail.ru:3478,stun:stun.sipnet.net:3478,stun:stun.l.google.com:19302,stun:stun.voip.aebc.com:3478')
     .split(',').map(s => s.trim()).filter(Boolean),
 };
diff --git a/apps/server/src/index.ts b/apps/server/src/index.ts
index b0cea86..ed021f3 100644
--- a/apps/server/src/index.ts
+++ b/apps/server/src/index.ts
@@ -124,6 +124,35 @@ app.get('/api/ice-servers', authenticateToken, (_req: AuthRequest, res) => {
     iceServers.push({ urls: config.stunUrls });
   }
 
+  // TURN сервер (динамическая или статическая аутентификация)
+  if (config.turnUrl) {
+    const urls = config.turnUrl.split(',').map(s => s.trim());
+    
+    if (config.turnSecret) {
+      // Динамический пароль (HMAC-SHA1)
+      const ttl = 48 * 3600;
+      const timestamp = Math.floor(Date.now() / 1000) + ttl;
+      const username = `${timestamp}:vortex`;
+      const credential = crypto
+        .createHmac('sha1', config.turnSecret)
+        .update(username)
+        .digest('base64');
+
+      iceServers.push({
+        urls: urls,
+        username,
+        credential,
+      });
+    } else if (config.turnUsername && config.turnPassword) {
+      // Статичный логин/пароль
+      iceServers.push({
+        urls: urls,
+        username: config.turnUsername,
+        credential: config.turnPassword,
+      });
+    }
+  }
+
   res.json({ iceServers });
 });
 
diff --git a/apps/web/src/components/CallModal.tsx b/apps/web/src/components/CallModal.tsx
index 4a1f1e5..9c71be3 100644
--- a/apps/web/src/components/CallModal.tsx
+++ b/apps/web/src/components/CallModal.tsx
@@ -319,6 +319,13 @@ export default function CallModal({ isOpen, onClose, targetUser, callType: initi
     setCallState('calling');
 
     try {
+      // Security context check (critical for KeenDNS)
+      if (!window.isSecureContext) {
+        alert('Критическая ошибка: Совершение аудио/видео звонков требует безопасного соединения (HTTPS).\n\nЗайдите в настройки KeenDNS и убедитесь, что включено HTTPS (SSL), а в браузере используйте https:// вместо http://');
+        setCallState('ended');
+        return;
+      }
+
       // Get media (video with camera enumeration fallback)
       console.log('[startCall] Getting media, wantVideo:', callType === 'video');
       const { stream, hasVideo } = await getMediaWithCameraFallback(callType === 'video');
diff --git a/docker-compose.yml b/docker-compose.yml
index 5d99429..2e2e744 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -24,6 +24,9 @@ services:
       JWT_SECRET: ${JWT_SECRET:-your-secure-random-secret-key-here}
       CORS_ORIGINS: ${CORS_ORIGINS:-http://localhost,http://localhost:80,http://localhost:9090,http://localhost:5173,http://${DOMAIN:-mess.khomegeneric.keenetic.pro},https://${DOMAIN:-mess.khomegeneric.keenetic.pro}}
       ENCRYPTION_KEY: ${ENCRYPTION_KEY:-0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef}
+      TURN_URL: ${TURN_URL:-}
+      TURN_USERNAME: ${TURN_USERNAME:-}
+      TURN_PASSWORD: ${TURN_PASSWORD:-}
     depends_on:
       - db
     ports: