Registration
Assumptions
- SPA behind a Full Cone NAT
- SIP Port: 5062 (SPA SIP Port)
- SIP Proxy Server: sip.voip-info.org
- SPA Private IP address: 192.168.0.2
- SPA Public IP address: 172.181.0.254
- User ID: spa1
- Display Name: Good Body
- Line 1 > NAT Settings > NAT Mapping Enable = “yes”
If Line 1 > Proxy and Registration > Register is set to “yes“, a good registration with a SIP Proxy that requires authentication would look like:
Syslog Entries
May 17 23:45:14 192.168.0.2 REGISTER sip:sip.voip-info.org SIP/2.0^M Via: SIP/2.0/UDP 172.181.0.254:5062;branch=z9hG4bK-987c308d;rport^M From: Good Body <sip:[email protected]>;tag=8eabec051f4433a7o0^M To: Good Body <sip:[email protected]>^M Call-ID: [email protected]^M CSeq: 1 REGISTER^M Max-Forwards: 70^M Contact: Good Body <sip:[email protected]:5062>;expires=3600^M User-Agent: Sipura/SPA3000-2.0.13(GWg)^M Content-Length: 0^M Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER^M Supported: x-sipura^M
^M
May 17 23:45:14 192.168.0.2 SIP/2.0 100 Trying^M Via: SIP/2.0/UDP 172.181.0.254:5062;branch=z9hG4bK-987c308d^M From: Good Body <sip:[email protected]>;tag=8eabec051f4433a7o0^M To: Good Body <sip:[email protected]>;tag=as09f77f44^M Call-ID: [email protected]^M CSeq: 1 REGISTER^M User-Agent: Asterisk PBX^M Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER^M Contact: <sip:[email protected]:5062>^M Content-Length: 0^M ^M
May 17 23:45:14 192.168.0.2 SIP/2.0 401 Unauthorized^M Via: SIP/2.0/UDP 172.181.0.254:5062;branch=z9hG4bK-987c308d^M From: Good Body <sip:[email protected]>;tag=8eabec051f4433a7o0^M To: Good Body <sip:[email protected]>;tag=as09f77f44^M Call-ID: [email protected]^M CSeq: 1 REGISTER^M User-Agent: Asterisk PBX^M Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER^M Contact: <sip:[email protected]:5062>^M WWW-Authenticate: Digest realm=”asterisk”, nonce=”08b2fea9″^M Content-Length: 0^M ^M
May 17 23:45:14 192.168.0.2 REGISTER sip:sip.voip-info.org SIP/2.0^M Via: SIP/2.0/UDP 172.181.0.254:5062;branch=z9hG4bK-6a542ab6;rport^M From: Good Body <sip:[email protected]>;tag=8eabec051f4433a7o0^M To: Good Body <sip:[email protected]>^M Call-ID: [email protected]^M CSeq: 2 REGISTER^M Max-Forwards: 70^M Authorization: Digest username=”spa1″,realm=”asterisk”,nonce=”08b2fea9″,uri=”sip:sip.voip-info.org”,algorithm=MD5,response=”e81fe46dedc9d44f792a5904b0c67be7″^M Contact: Good Body <sip:[email protected]:5062>;expires=3600^M User-Agent: Sipura/SPA3000-2.0.13(GWg)^M Content-Length: 0^M Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER^M Supported: x-sipura^M ^M
May 17 23:45:14 192.168.0.2 SIP/2.0 100 Trying^M Via: SIP/2.0/UDP 172.181.0.254:5062;branch=z9hG4bK-6a542ab6^M From: Good Body <sip:[email protected]>;tag=8eabec051f4433a7o0^M To: Good Body <sip:[email protected]>;tag=as09f77f44^M Call-ID: [email protected]^M CSeq: 2 REGISTER^M User-Agent: Asterisk PBX^M Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER^M Contact: <sip:[email protected]:5062>^M Content-Length: 0^M ^M
May 17 23:45:14 192.168.0.2 SIP/2.0 200 OK^M Via: SIP/2.0/UDP 172.181.0.254:5060;branch=z9hG4bK-6a542ab6^M From: Good Body <sip:[email protected]>;tag=8eabec051f4433a7o0^M To: Good Body <sip:[email protected]>;tag=as09f77f44^M Call-ID: [email protected]^M CSeq: 2 REGISTER^M User-Agent: Asterisk PBX^M Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER^M Expires: 3600^M Contact: <sip:[email protected]:5062>;expires=3600^M Date: Tue, 17 May 2005 15:45:14 GMT^M Content-Length: 0^M ^M
May 17 23:45:14 192.168.0.2 [0]RegOK. NextReg in 3599 (1)
I underlined the Contact: information to point out that behind a NAT, the private IP address (192.168.0.2) should not appear in the Contact: information. Instead, the public IP address (172.181.0.254) should appear. If it does not, then the SIP Proxy cannot properly send you any SIP INVITEs for incoming calls.
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April 7, 2023
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