I'm trying to setup 3CX on a Windows VPS. Here is some info: WIndows 2003 64bit VPS is running in a Virtuozzo container Tried 3CX version 7 and 8 The problem is with registering with a Voip provider. The version 7 shows the error : 21:52:21.239 [CM305004]: Failed to find a transport to host 220.127.116.11 It doesnt matter what provider I try, same error (different IP). I've changed the STUN servers, to see if that was the problem. Incoming registrations work fine. Phones can register and make internal calls. Any help would be appreciated.