Hello, I decided to give IP PBX a try and chosen elastix. So .. new pc, fresh install, sangoma B600D on the way so let's se what we can do with it. e-mail setup voice mail, IVR, it's just great.FOr the testing I used soft phone to see that it's working but all the testing was done from the local LAN. I needed to be able to access this features from my mobile phone so I installed portgo for windows mobile. I used the unembeded freepbx to set my server as behind NAT with a fixed external IP address and set the local subnet.The I forwarded from the router udp 5060 and 10000-20000, in the end i enabled also dmz host jut to be sure. when i am in the lan I can register with the mobile phone to the pbx but from outside ... I always get registration failed. To authenticate Internally i use the ip of the server the extension number and the secret.That's it. I tried the same from the outside but using an dyndns FQDN since I do not have may own domain.same issue. I created a new user "user" and a password , in the extension group and assigned this user the needed extension (207). logging with user and password instead of extension and secret does not work. I think the problem is not the server but me not knowing what I need to write in those fields or maybe add something extra to the server configuration. not even x-lite works from outside. Can someone please help me with this issue? Thank you a lot!