Futun - Simple IP-over-UDP tunnel using TUNTAP

Futun is a simple IP-over-UDP tunnel for minimal-setup tunneling.

It uses the TUN/TAP http://en.wikipedia.org/wiki/TUN/TAP device and works on GNU/Linux and Mac OS X.

Compiling

cabal configure
cabal build

If you're missing dependencies you can install them with cabal install.

The binary will end up in dist/build/futun/futun. You can do "cabal install" to install the binary to the Haskell binary directory.

Use

| futun server [port] | futun client [hostname] [port]

Start the server on machine A and client on machine B:

root@A: ./futun server 12345
root@B: ./futun client A 12345

Setup IP addresses:

root@A: ifconfig tun0 192.168.1.1 pointopoint 192.168.1.2
root@B: ifconfig tun0 192.168.1.2 pointopoint 192.168.1.1

And if you want you can setup some NAT to get to say A's network:

root@A: iptables -t nat -A POSTROUTING -s 192.168.1.2 -j MASQUERADE
root@A: sysctl -w net.ipv4.conf.all.forwarding = 1

root@B: ip route add 172.16.0.0/16 via 192.168.1.1