A dead simple script that stops a Wiregard tunnel, continuously pings a host (by default, 1.1.1.1) and reconnects upon successful ping.
Useful for temporarily stopping Wireguard tunnel and logging into a public Wifi hotspot, but quickly reconnecting as soon as possible.
I suppose this is for those too lazy to set-up proper network namespace routing, as described in the Wireguard documentation. If like me, you will "get around to doing that one day", this might be of use in the meantime.
This script assumes you're using a wg-quick@ systemd service.
If you want to create a systemd service, you can simply run:
sudo systemctl enable [email protected]
as long as you have a wg-quick config located at /etc/wireguard/wg1.conf.
First modify the script to make sure the $WG_TUNNEL variable is adequately defined for your setup.
The script can then be launched as your current user when you need to stop your wireguard tunnel and have it started again as soon as possible:
./wg-reconnect-on-ping.sh
You will be prompted by sudo to enter your password in order to stop and start the tunnel.
You may want to make this script callable from anywhere by adding it to your terminal's PATH. Here is a suggestion on how to do so:
cp wg-reconnect-on-ping.sh ~/.local/bin/