When used IPv6 instead of DNS name then I can see an error message. ``` /usr/sbin/kamailio[5793]: INFO: rtpengine [rtpengine.c:1625]: mod_init(): Loading rtpengine definitions from DB /usr/sbin/kamailio[5793]: WARNING: rtpengine [rtpengine.c:1022]: add_rtpengine_socks(): Node address must end with a valid port number. Ignore '[2600:1f18:40ed:da00::1:12]:2223'. ```