I have a AsteriskNOW Server with Asterisk 11 and FreePBX 12. There is a problem with my SIP Provider. I hope I can explain it understandable.
Asterisk send an REGISTER to 217.0.23.68 (tel.t-online.de). 217.0.23.68 answers with OK, the peer is successfully registered.
Normally, the server again signaled over the same address without problems. Sometimes, however, there is the problem that the server answers from 217.0.23.100. Then Asterisk responds to INVITE with 401 unauthorized.
I can not make calls and receive calls.
Waiting for a new REGISTER does not resolve the problem. Only a “sip reload” helps further.
Some settings: allowguest=no; nat=no; srvlookup=no
After changing ip address the register works fine. But the qualify SIP Options ist always send to the old ip address - I mean, Asterisk hasn’t understood the change completely.