It is behind a very dumb firewall (linux iptables) - I don't think that should affect things. Certainly other servers behind the same firewall do work.
It is caddy doing the serving - I expect that is the difference.
It is behind a very dumb firewall (linux iptables) - I don't think that should affect things. Certainly other servers behind the same firewall do work.
It is caddy doing the serving - I expect that is the difference.