Hi @karlkuhn,
Have you opened the port in firewall (iptables) on the FX30?
The firewall for all interfaces other than USB/ECM is by default extremely restrictive - off the top of my head only DNS(udp:53) and ping(icmp) are opened by default - the last rule in the input chain is DROP ALL.
Oh … I’ve also started using getaddrinfo() instead of getnameinfo() - apparently getnameinfo() has been deprecated and doesn’t play well with IPv6…
ciao, Dave