tun

Does ssh server require or use tuntap interface when tunneling?

I'm creating app to tunnel ipv4 packet using tuntap on client side and no tuntap on server side

Solution

  • If you dont want to login as root to ssh server you can prepare tuntap devices on both sides (client and server)

    MODE=tap
DEV=tap0
IP=9.0.0.1 # client and server must be different

sudo ip tuntap add ${DEV} mode ${MODE}
sudo ifconfig ${DEV} ${IP} up

    and login as ssh user@server -o Tunnel=ethernet -w 0:0 (no root needed).

    If you want tun dont use -o Tunnel=ethernet in ssh command and set MODE to tun and DEV to tun0