Comment on If I already have a VPN always on on my system, do I need to set up a gluetun container?
TCB13@lemmy.world 1 week agoYou can force all outgoing traffic to use the VPN interface via iptables/routes (meaning if it doesn’t exist or doesn’t work nothing will be able to access the internet) OR use systemd globally hide the non-VPN network interface from all services except for the VPN client.
GreenKnight23@lemmy.world 6 days ago
IMO this is the best OS way, but without nix it’s a pita to maintain through restores/rebuilds. personally I never fully comprehended how to properly configure iptables/routes (I did try though, so nobody can blame me lol).
however, a major benefit to using a contained VPN or gluetun is that you can be selective on what apps use the VPN.
I host 12 other containers (with nas mounts) on the same host outside of the three that need to use a VPN, so this is why the solution I described works for me. and should I ever need to use routes for more advanced network filtering I still have it available without adding the complexity of splitting normal traffic vs VPN traffic.
TCB13@lemmy.world 6 days ago
No it isn’t. You can even define those routing polices in your systemd network unit alongside the network interface config and it will manage it all for you.
If you aren’t comfortable with systemd, you can also use simple “ip” and “route” commands to accomplish that, add everything to a startup script and done.
Systemd can do that for you as well, you can tell that a certain service only has access to the wg network interface while others can use eth0 or wtv.
Chewy7324@discuss.tchncs.de 5 days ago
Yes, there’s many ways to make programs unable to use other network interfaces. E.g. I’m creating a network namespace with a single wg0 interface, which I make services use through systemd NetworkNamespacePath.
That said, I’d argue gluetun is pretty much foolproof, especially with most people using docker which messes with iptables.