Hi to all. Does value 0 of parameter tunnel-id has some special meaning or behavior? My setup is a bit complicated but I'll try to explain it if no one has a quick answer. In short, tunnels with tunnel-id=0 ignore some firewall rules (in table filter, chain input) while establishing when tunnels with tunnel-id=1..n not. Changing only tunnel-id value nor firewall rules, routing or any.

Thank you.