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Proxying a single app through WireGuard while routing everything else through Mullvad VPN on Linux (sh.itjust.works)

submitted 2 months ago by [email protected] to c/[email protected]

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I'm trying to achieve a specific setup where I want to proxy a single app (lets say, GIMP) through a WireGuard/OpenVPN connection, while routing all other traffic through the Mullvad VPN app. The issue is that the VPN provider doesn't support SOCKS5 or any other proxy protocols(Not Mullvad VPN).

I've attempted to set up a WireGuard connection that only allows GIMP to pass through, but I'm not sure if I'm on the right track and don't know how to do it. Has anyone successfully achieved this setup on Linux? If so, I'd love to hear about your approach.

Specifically, I'm looking for a way to proxy GIMP through WireGuard/OpenVPN while keeping all other traffic routed through the Mullvad VPN app. Any guidance or advice would be greatly appreciated!

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[–] [email protected] 8 points 2 months ago* (last edited 2 months ago) (1 children)

network namespaces can do it, firejail makes it easy but there's several other methods as well.

if you already know the IP address(es) you will be communicating with, it's even easier just by adding a static route with a gateway of the VPN interface.

[–] [email protected] 1 points 2 months ago* (last edited 2 months ago)

Thanks for the Firejail suggestion, I'm currently experimenting with it but keep getting a error. When I attempt to add my WireGuard configuration using the command sudo wg-quick up wireguard, I consistently receive the error message /usr/bin/wg-quick: line 32: resolvconf: command not found. I've tried starting resolvconf via systemd, and it's now running, but the error persists.