Hi all, I have a trunk with a gateway configured with name/proxy "sip.xxx.com". On inbound calls the gateway sends sip packets with a realm "1.2.3.4.5" which is the resolution of sip.xxx.com. Unfortunately when the gateway asks for the BYE authentication, freeswitch reply with: 2012-08-21 14:51:47.291432 [ERR] sofia_reg.c:2167 Cannot locate any authentication credentials to complete an authentication request for realm '"1.2.3.4.5"' Is there any way to tell freeswitch to use the reverse DNS resolution for the matching of realm? If I set directly the IP, all is fine. Best regards, Carlo Dimaggio