My freeswitch configuration was working fine until I upgraded to ubuntu 12.04. Now sofia status indicates that registering trunk_1 to my sip provider times out: 2012-07-12 09:02:51.252018 [WARNING] sofia_reg.c:449 Timeout Registering trunk_1 2012-07-12 09:02:53.252075 [WARNING] sofia_reg.c:468 trunk_1 Failed Registration [908], setting retry to 45 seconds. A major clue is that sofia_dig on the ipv4 of my sip provider returns instantly, while if I use the dns hostname it takes about 3 minutes to return the information. freeswitch@internal> sofia_dig 64.254.145.209 Preference Weight Transport Port Address ================================================================================ 1 1.000 udp 5060 64.254.145.209 2 1.000 tcp 5060 64.254.145.209 Ubuntu 12.04 introduced dns-cacheing, but I have tried turning this off (comment out dns=dnsmasq in /etc/NetworkManager/NetworkManager.conf) and the problem persists. Any tips or suggestions would be helpful. I should point out that my system is behind a router, though I've had the FS configuration working with NAT before. Cheers, -Aaron