3478
STUN / TURN
Low RiskTCP/UDP — Streaming & Media
Port Overview
Port Number
3478
Service Name
STUN / TURN
Transport Protocol
TCP/UDP
Category
Streaming & Media
Security Risk
Low
Port Range
Registered (1024-49151)
What is Port 3478?
Port 3478 is the standard port for STUN (Session Traversal Utilities for NAT) and TURN (Traversal Using Relays around NAT) protocols, critical for WebRTC and VoIP applications. These protocols help peers discover their public IP addresses and traverse NAT/firewall boundaries for real-time communications. It is widely used in video conferencing, online gaming, and peer-to-peer applications.
TCP/UDP
Streaming & Media
Commonly Used
Security Considerations
Port 3478 (STUN / TURN) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.
Recommendation: Standard security practices apply. Keep software updated and monitor access.