[Jan 31 15:15:55] <--- Received SIP request (714 bytes) from UDP:192.168.3.224:33005 --->
[Jan 31 15:15:55] REGISTER sip:192.168.2.161:17060;transport=UDP SIP/2.0
[Jan 31 15:15:55] Via: SIP/2.0/UDP 192.168.3.224:33005;branch=z9hG4bK-d8754z-d63c96be5818dc0a-1---d8754z-;rport
[Jan 31 15:15:55] Max-Forwards: 70
[Jan 31 15:15:55] Contact: <sip:204@192.168.3.224:33005;rinstance=1ca128c745fbc46e;transport=UDP>
[Jan 31 15:15:55] To: <sip:204@192.168.2.161:17060;transport=UDP>
[Jan 31 15:15:55] From: <sip:204@192.168.2.161:17060;transport=UDP>;tag=5160251c
[Jan 31 15:15:55] Call-ID: MGQ4Y2MwY2YwZmQ3MDBmZmQ2YTY5NmExOGMwMmM0NDc.
[Jan 31 15:15:55] CSeq: 2 REGISTER
[Jan 31 15:15:55] Expires: 3600
[Jan 31 15:15:55] Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE
[Jan 31 15:15:55] Supported: replaces, norefersub, extended-refer, timer, X-cisco-serviceuri
[Jan 31 15:15:55] User-Agent: Z 3.3.25608 r25552
[Jan 31 15:15:55] Allow-Events: presence, kpml
[Jan 31 15:15:55] Content-Length: 0
[Jan 31 15:15:55] 
[Jan 31 15:15:55] 
[Jan 31 15:15:55] <--- Transmitting SIP response (571 bytes) to UDP:192.168.3.224:33005 --->
[Jan 31 15:15:55] SIP/2.0 401 Unauthorized
[Jan 31 15:15:55] Via: SIP/2.0/UDP 192.168.3.224:33005;rport=33005;received=192.168.3.224;branch=z9hG4bK-d8754z-d63c96be5818dc0a-1---d8754z-
[Jan 31 15:15:55] Call-ID: MGQ4Y2MwY2YwZmQ3MDBmZmQ2YTY5NmExOGMwMmM0NDc.
[Jan 31 15:15:55] From: <sip:204@192.168.2.161>;tag=5160251c
[Jan 31 15:15:55] To: <sip:204@192.168.2.161>;tag=z9hG4bK-d8754z-d63c96be5818dc0a-1---d8754z-
[Jan 31 15:15:55] CSeq: 2 REGISTER
[Jan 31 15:15:55] WWW-Authenticate: Digest  realm="asterisk",nonce="1548944155/735248477e61e0fa37c3493786a70b85",opaque="6d75fcd34faa9a27",algorithm=md5,qop="auth"
[Jan 31 15:15:55] Server: Asterisk PBX certified/13.21-cert2
[Jan 31 15:15:55] Content-Length:  0