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?
I disagree that it’s simpler, because most VPNs will use dynamic IPs. So any time your internet flickers or your power goes out, you’ll need to reconfigure Transmission with the new IP. Sure your method works for a kill switch. But it requires manual intervention every time it gets killed. With qBit’s interface binding, it doesn’t care what the VPN’s IP is. All it cares about is that it’s using the specific interface. So if the VPN is disconnected (and the VPN’s interface has no connection) then qBit simply thinks there’s no connection to the internet.
It doesn’t. You can specify your VPN provider range instead of a single IP and you won’t need manual intervention.
If you go the systemd route you can do it even better with RestrictNetworkInterfaces:
So I guess this is a better option than doing IP or IP range restrictions - zero manual intervention like you do in qBit. I’m so used to work with IPs instead of interfaces (because of the issues that can cause) that I even forgot about that option.