STUN Server Functionality Explained
Learn how STUN (Session Traversal Utilities for NAT) servers help peers discover their public IP addresses and port mappings.
What is a STUN Server?
Welcome! Today we'll unravel the mystery of STUN servers. STUN stands for Session Traversal Utilities for NAT. It's a key technology that helps WebRTC connections work.
Its main job is to help devices behind a NAT (Network Address Translator) discover their public IP address and port number. This is crucial for establishing direct peer-to-peer connections.
NAT: A Quick Reminder
Remember NAT from our previous lesson? NAT helps multiple devices in a private network share a single public IP address. While great for conserving IPs, it hides your device's true network address from the outside world.
For WebRTC, this is a problem! Peers need to know each other's actual, routable addresses to connect directly. STUN is here to solve this.
All lessons in this course
- NAT and Firewall Challenges
- STUN Server Functionality Explained
- TURN Server for Relayed Connections
- Deploying and Securing Your Own TURN Server