Hi; I have an * box behind a nat, and a sip phone (grandstream budgetone 102s) behind another nat. I had them working together fine using STUN and port forwarding, but now the phone won't register to the * server!
I'm trying to figure out why this is... the phone can talk to the server, and the server can talk to the phone (I watch packets flow both ways through my gateway, also sip debug ip <grandstream phone's external ip> shows registration attempts, and the sip phone's information page shows sip packets received/sent. I'm a novice to the voip world, but I've spent many many days trying to research this problem and can't figure it out. Could this be a stun server problem? It's not my stun server that I'm using, but it detects full cone nat with correct remote ip... Also, the registration information that "sip debug ip" shows doesn't change at all if I give the phone an incorrect password. Is there some way of getting more information on the registration process? I tried examining the code but it would take me years to figure that out... Changing the verbose and debug values surprisingly didn't affect the output I get. If there's any information that I'm leaving out that could be of use in diagnosing this problem, please let me know! Thanks in advance; Mr. Frustration. (aka Andy)
