go-tun2socks

A tun2socks implementation written in Go.

If you're looking for an easy to use tun2socks implementation for iOS, you might be interested in leaf and ileaf. leaf implements tun2socks and it's written in Rust, with significantly less memory usage and significantly better performance compares to the Go version.

To run the tun2socks command line program, depending on OS, you may need to run it as root, create the TUN interface and/or configure IP address of the interface manually. Moreover, you should add corresponding routes to the routing table manually. Mind that you often want to use some different system DNS resolvers, and your proxy server should support UDP.

To use go-tun2socks as a library in your own project, refer to the following files/repos for some ideas:

• https://github.com/eycorsican/go-tun2socks/tree/master/cmd/tun2socks
• https://github.com/eycorsican/go-tun2socks-mobile
• https://github.com/Jigsaw-Code/outline-go-tun2socks

It's recommended to write your own SOCKS layer. For example, you can create a "tun2shadowsocks" program by implementing a Shadowsocks handler, see https://github.com/Jigsaw-Code/outline-go-tun2socks/tree/master/shadowsocks

It's also recommended to write your own TUN layer to connect the TUN interface and go-tun2socks, see https://github.com/eycorsican/go-tun2socks/tree/master/tun for examples.

The following projects are using go-tun2socks:

• https://github.com/mellow-io/mellow
• https://github.com/eycorsican/kitsunebi-android

Quick start

Create an ssh SOCKS proxy:

ssh -D 1234 -C -N [email protected]

Create a tunnel:

sudo tun2socks -proxyServer 127.0.0.1:1234 -routes 10.0.0.0/8,172.16.0.0/12 -exclude example.com,10.0.0.1 -loglevel debug

Windows

Windows build requires a https://www.wintun.net dll located in the tun2socks executable path.

FreeBSD

FreeBSD requires gmake package to be installed and executed.