Voice & Video

Matrix supports voice and video calls, but requires open ports.

Important

Voice/video does NOT work through Cloudflare Tunnel. You must open ports on your VPS.

Required Ports

ufw allow 3478/udp
ufw allow 3478/tcp  
ufw allow 49152:49200/udp

Port	Protocol	Purpose
3478	UDP+TCP	STUN/TURN signaling
49152-49200	UDP	Media relay (audio/video data)

How It Works

1. STUN - Discovers your public IP
2. TURN - Relays traffic when direct connection fails (NAT traversal)
3. Media - Actual voice/video data flows over UDP

Verify

After opening ports, test with a Matrix client that supports calls:

1. Open your server in Element or Nheko
2. Start a voice call with someone
3. Check if audio/video connects

Alternative: Third-Party TURN

Don’t want to open ports? Use a hosted TURN service:

• Metered.ca - Free tier available
• Twilio - Paid
• Cloudflare Calls - Paid

Configure in config/continuwuity/continuwuity.toml with your provider’s credentials.

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Text chat works fine through Cloudflare Tunnel. Only voice/video needs these ports.