ccding/go-stun — 720 Stars

go-stun

A go implementation of the STUN client (RFC 3489 and RFC 5389)

Last updated Jul 4, 2026

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README

go-stun =======

go-stun is a STUN (RFC 3489, 5389) client implementation in golang (a.k.a. UDP hole punching).

RFC 3489: STUN - Simple Traversal of User Datagram Protocol (UDP) Through Network Address Translators (NATs)

RFC 5389: Session Traversal Utilities for NAT (STUN)

Simply run these commands (if you have installed golang and set $GOPATH)

go get github.com/ccding/go-stun go-stun

or clone this repo and run these commands

go build ./go-stun

You will get the output like

NAT Type: Full cone NAT External IP Family: 1 External IP: 166.111.4.100 External Port: 23009

You can use -s flag to use another STUN server, and use -v to work on verbose mode.

> ./go-stun --help Usage of ./go-stun:   -s string         server address (default "stun1.l.google.com:19302")   -v    verbose mode

The library github.com/ccding/go-stun/stun is extremely easy to use -- just one line of code.

import "github.com/ccding/go-stun/stun"
func main() { 	nat, host, err := stun.NewClient().Discover() }

More details please go to main.go and GoDoc

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