http://ciisqbg45nggykdl6rjdrq3wc64csga4vkphu66qsi65mypeitqedoad.onion/blog/port-striping-v3
WireGuard users: entries are removed when you disconnect, but if you reconnect within 20 minutes and happen to land in the same namespace as before, your settings will still be active. If you're assigned a different namespace, you'll need to revisit /changemyip to reapply them.