this post was submitted on 20 Oct 2024
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Is there a way to use a vpn on one network card, and use a second network card for a regular connection? (lemmy.dbzer0.com)
submitted 1 month ago by Tippon@lemmy.dbzer0.com to c/linux@lemmy.ml
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I've got a Linux server running Xubuntu at the moment (It was a media player first), and it also runs two Minecraft servers for the family. It has two network cards that are both connected to the internet. Is there a way to bind the VPN to one of the cards and use the other one for regular use?

I've got Surfshark as my VPN, and it doesn't allow port forwarding under Linux. I've got some software that I want to keep behind the VPN, but the lack of port forwarding is stopping me from sharing the Minecraft servers, and when the VPN is active, it slows down the connection to some of my services like Plex.

I've tried to look it up, but I just don't know enough to get myself anywhere. I've found results that talk about name spaces and routing tables, but they assume a level of knowledge that I just haven't got yet.

I want to use the Arr suite and qBittorrent as the main programs behind the VPN, and Plex, Mylar (a comic manager), Syncthing, and Minecraft as the main programs without it. If I set up qBittorrent and the Arrs as Docker containers, can I use Gluetun to bind just them to the VPN? The VPN is using OpenVPN connections if that makes a difference.

Thanks in advance :)

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[–] just_another_person@lemmy.world 7 points 1 month ago (3 children)

Gluetun is for containers. OP is asking about routing.

[–] MalReynolds@slrpnk.net 3 points 1 month ago

It also exposes a proxy (and a tun), most things you want behind a vpn can use a proxy.

[–] nsfwpls@lemdro.id 2 points 1 month ago (1 children)

I'm pretty sure OP is asking about forcing containers to use the VPN through gluetun.

"If I set up qBittorrent and the Arrs as Docker containers, can I use Gluetun to bind just them to the VPN?"

[–] just_another_person@lemmy.world 1 points 1 month ago

I think they are just misunderstanding what Gluetun is for.

[–] Tippon@lemmy.dbzer0.com 1 points 1 month ago

Apologies for the slow reply :)

To clarify, I'm happy with using either, if my network traffic is split. Ideally I want to switch a lot of my programs to containers at some point, then switch to a better server OS. In the meantime though, I just want to get everything working together.

Qbittorrent has to be behind the VPN, and that's stopping my Minecraft servers from connecting to the outside world. If there's a way to force Qbittorrent to be behind the VPN while leaving a non VPN connection open, I'm happy to use it. I only mentioned Gluetun because I've heard of it, and I know that it's for keeping containers behind a VPN. I thought it might be the answer here :)