This may not be a small problem, but I’d like to see if anyone knows how to do this. Or if it’s even possible.
I have a motherboard with two physical NICs. I am currently using the first one (eth0) for internet access and local LAN access (it’s a file server).
I want to use the second NIC for qbittorrent. I want to do this “safely”, meaning I want the interface to block everything in and out except for the one specific port qbittorrent uses. I also would like to use openvpn, but only on that second interface.
Ideally I would like the second NIC connected directly to the internet modem, completely bypassing my internal network and firewall. I can’t do this right now, as I don’t have an easy way to route cable to the modem. So for testing purposes (and probably temporary use if I can get this working) it is connected to my internal network.
I tried setting the second interface to a couple different firewall zones (block and drop), but I could still ping the IP address that was assigned to that interface via DHCP. The firewall GUI is weird and hard to figure out what’s what. I also set up an openvpn connection, but I couldn’t find a way to assign it to the second NIC interface.
Does what I am trying to do make sense? Is it possible without being overly complicated and difficult?