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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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[-] bloodfart@lemmy.ml 2 points 1 month ago

I think the defaults on your tunnel apply themselves to all interfaces(or whatever the active one(s) are.

If you wanna troubleshoot this from the ground up you’d start with looking at your routing table.

If you run into problems using the process enumerated in the link you posted a couple of replies down, you can start to troubleshoot it by looking at the routing table with iptables -L

[-] Tippon@lemmy.dbzer0.com 2 points 3 weeks ago

Sorry, I forgot to reply sooner >.<

I've been trying to get my head around this and also looking into Docker containers with Gluetun, as that looks a bit easier to start with. I think for the moment I'm going to go down the Docker route, and at least get the bulk of the programs separated, and give myself some breathing space to learn a bit more.

Docker isn't ideal, as not everything has a Docker version, but the main programs that I originally mentioned do, and it will let me open the Minecraft servers to the kids in the extended family, especially as it's getting colder and darker here.

I just want to say thank you to you, @jet@hackertalks.com, @lungdart@lemmy.ca, and everyone else who's helped :)

I'm not giving up on this, I'm just going a bit more towards the basics and learning to walk before I try to run. This switching from Windows malarkey is hard work! ;)

this post was submitted on 20 Oct 2024
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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