Gluetun kill switch: when the VPN drops
Gluetun installs a real firewall kill switch inside its own network namespace. What your containers see when the tunnel dies, and how to prove it holds.
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Gluetun Port Forwarding for Torrent Apps
Downloads work but nothing ever connects in. Set up gluetun port forwarding, push the new port to your torrent client on every reconnect, and verify it.
Gluetun: reach the host and other containers
A container behind Gluetun has no interfaces of its own. Publish its ports on Gluetun, and open only the subnets it must reach outside the tunnel.
Route Docker containers through a VPN
Put a container behind a Gluetun sidecar and its ports vanish. Here is why the shared network namespace does that, and the compose file that works.