Trouble setting up extension on different subnet

[jparisi]

I'm trying to set up an extension from home. I have a site to site VPN set up between two Sonicwall TZ-170's with no rules blocking any ports so NAT shouldn't be a problem.

When setting up the 3cx softphone I get this repeatedly in the log:

-------------------------------------------
20:47:28,517: T: 172.20.0.6:5060
REGISTER sip:172.20.0.6 SIP/2.0
Via: SIP/2.0/UDP 10.0.0.190;branch=z9hG4bK002381dcdc7ddc1191d300c049f44662
From: 3CX Phone <sip:[email protected]>;tag=10092
To: <sip:[email protected]>
Call-ID: [email protected]
CSeq: 3 REGISTER
Contact: <sip:[email protected]>
Max-Forwards: 70
User-Agent: SIPPER for 3CX Phone
Expires: 900
Content-Length: 0

The 3cx server is 172.20.0.6 and the local IP is 10.0.0.190. I can ping back and forth with no problem.

I tried with the external extension checkbox both checked and un-checked.

I have the 3cx phone configured as per the screenshots, I've also tried X-Lite and a SNOM 360 softphone, all with no luck.

I see no activity in the 3cx server logs that show anything trying to connect.


Any ideas?

JP

 

[5qg4]

It should be firewall issue. I'm hit this issue before. For Netscreen NS25 (Screen OS 5.0.0r8) to Draytek (LAN to LAN). I need to upgrade the Screen OS to 5.4.0r6 for solved this issue. If you are now using 3CX softphone. I suggested that to change X-Lite instead. Its a freeware. It may be help to solve your registration issue via your VPN. If still not help. Please try to use Wireshark to capture the NIC activities for communication between your phone and 3cx box for future investigate.
e.g
10.1.1.218 - 3CX BOX at Office
192.168.2.101 - Eyebeam at Home
No. Time Source Destination Protocol Info
203 36.955298 192.168.2.101 10.1.1.218 SIP Request: SUBSCRIBE sip:[email protected]:5060
205 37.084328 10.1.1.218 192.168.2.101 SIP Status: 200 OK
208 37.119669 192.168.2.101 10.1.1.218 SIP Request: REGISTER sip:10.1.1.218
210 37.250097 10.1.1.218 192.168.2.101 SIP Status: 200 OK (1 bindings)
211 37.351834 192.168.2.101 10.1.1.218 SIP Request: SUBSCRIBE sip:[email protected]
213 37.470590 10.1.1.218 192.168.2.101 SIP Status: 200 OK
214 37.471846 10.1.1.218 192.168.2.101 SIP Request: NOTIFY sip:[email protected]:23194
215 37.573701 192.168.2.101 10.1.1.218 SIP Status: 200 OK