Curated port reference

Port 3478: STUN / TURN

STUN / TURN commonly uses port 3478 over TCP + UDP. Review its purpose, traffic direction and operational security considerations.

3478TCP + UDP

STUN / TURN

Default plaintext STUN and TURN endpoint for NAT traversal and media relay.

Typical use

STUN / TURN endpoints in environments where this service is explicitly configured.

Traffic direction

Bidirectional

Security considerations

Require TURN credentials, rate limits, and relay restrictions; UDP is commonly required for media performance.

Webrtc