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 220.127.116.11 (tel.t-online.de). 18.104.22.168 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 22.214.171.124. 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