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A simple VPN written in Go.
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README.md

vtun

A simple VPN written in golang.

Travis Go Report Card image image

Features

  • VPN over udp
  • VPN over websocket

Usage

Usage of ./vtun:
  -S    server mode
  -c string
        tun interface CIDR (default "172.16.0.2/24")
  -g string
        gateway (default "172.16.0.1")
  -k string
        encryption key (default "6w9z$C&F)J@NcRfWjXn3r4u7x!A%D*G-")
  -l string
        local address (default "0.0.0.0:3000")
  -p string
        protocol ws/wss/udp (default "wss")
  -r string
        route to forward data
  -s string
        server address (default "0.0.0.0:3001")

Build

sh scripts/build.sh

Client

sudo ./vtun-linux-amd64 -l=:3000 -s=server-addr:3001 -c=172.16.0.10/24 -k=123456

Server

sudo ./vtun-linux-amd64 -S -l=:3001 -c=172.16.0.1/24 -k=123456

Server setup

  1. Add TLS for websocket,reverse proxy server(3001) via nginx/caddy(443)

  2. Enable IP forwarding on server

  sudo echo 1 > /proc/sys/net/ipv4/ip_forward
  sudo sysctl -p
  sudo iptables -t nat -A POSTROUTING -s 172.16.0.0/24 -o ens3 -j MASQUERADE
  sudo apt-get install iptables-persistent
  sudo iptables-save > /etc/iptables/rules.v4

Docker

Run client

docker run  -d --privileged --restart=always --net=host --name vtun-client netbyte/vtun -l=:3000 -s=server-addr:3001 -c=172.16.0.10/24 -k=123456

Run server

docker run  -d --privileged --restart=always --net=host --name vtun-server netbyte/vtun -S -l=:3001 -c=172.16.0.1/24 -k=123456

Mobile client

Android