Concepts

Split tunnelling with vpn-slice and openconnect

tun0 is a VPN interface.

Split tunnelling is where you only want some traffic to be routed through a VPN connection, rather than all traffic. This is done using fancy things like IP routes and modifying the hosts file.

vpn-slice is a python utility which makes it easier to configure openconnect or vpnc to pass only selected traffic through the VPN.

sudo dnf install -y python3-devel
sudo pip3 install --prefix /usr/local https://github.com/dlenski/vpn-slice/archive/master.zip

Heavy credits go to Stefan’s Gist for this one.

Cookbook

Using sshuttle to make a VPN connection when stuck on a guest network that seems to block VPN connections:

sshuttle -r <your username>@ovpn.example.com:330 0.0.0.0/0 --dns