I’m a long-time Transmission user but I just learned that VPN killswitches are a thing (how did it take me so long!?). I would like to try another client which has this feature in case I forget to launch my VPN client before opening Transmission. Does anybody have any recommendations? Deluge? QBittorrent? Or any others?
If you’re using Nord VPN then you can enable a kill switch directly in the VPN through a console command which is documented on the Nord docs. It works, I tested it.
I would not rely on Nord’s VPN killswitch. It can be slow and unreliable and still briefly expose your IP to the swarm. I got an ISP letter thinking I was protected through nord’s killswitch, but turns out it was not completely covering me.
I would bind the client to the wireguard network interface directly through the client. In Qbittorrent you can do it pretty easily as @[email protected] mentioned.
Mullvad has one right in the GUI too, it’s called “Lockdown Mode” IIRC.
Also qBittorrent has a thing in preferences where you can bind it to a specific network interface, so you can just set it to whatever your VPN uses (for Mullvad Wireguard it’s ‘wg-mullvad’) and then if the VPN goes down it just won’t do anything.