This is probably a newbie problem, but I've been knocking my head over it for a few hours this morning, so I thought I'd ask for some help. I was running FreeSWITCH 1.2.7 on CentOS 5.8 (as a VM), and it was working fine. I upgraded to the latest FreeSWITCH 1.5.14b on CentOS 6.5. I still need to configure SELinux, so I turned that off for now. I also was suspecting the firewall, so I turned that off as well. I copied the configuration over, and the voicemail recordings, etc. Now we can receive calls, but we can't place external calls. We're using FlowRoute, and I'm getting this: 2014-09-24 13:37:42.695288 [NOTICE] sofia_reg.c:427 Registering flowroute 2014-09-24 13:37:42.695288 [ERR] sofia_reg.c:2292 flowroute Registration Failed with status DNS Error [503]. failure #2 2014-09-24 13:37:43.715285 [WARNING] sofia_reg.c:482 flowroute Failed Registration [503], setting retry to 30 seconds. The DNS seems to resolve sip.flowroute.com just fine, when using ping. And incoming calls are working! Where should I look next? By the way, I can call the FreeSWITCH conference line, so it can DNS lookup conference.freeswitch.org just fine. -- Steve