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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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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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[–] nsfwpls@lemdro.id 17 points 1 month ago (5 children)

Yes, that's what Gluetun is for. You create a Gluetun container and specify which containers should use it as the gateway in the compose file with:

network_mode: "service:gluetun"

Then you can open a shell in the container and run this to see if the container's IP is different from your own:

curl ifconfig.io

Make sure to try stopping the gluetun container and confirm your other containers lose network access.

There are plenty of guides about this if you search for "gluetun arr stack", like this random one I picked: https://www.smarthomebeginner.com/gluetun-docker-guide/

That has some steps outlining the basic gluetun configuration, how to put specific containers behind it, and test it.

[–] just_another_person@lemmy.world 7 points 1 month ago (4 children)

Gluetun is for containers. OP is asking about routing.

[–] 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.

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