root@comcerto:~# tcpdump -v -s1514 port 5060 and host 172.16.200.70 tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 1514 bytes 03:47:00.428341 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1062) 172.16.110.11.5060 > 172.16.200.70.5060: SIP, length: 1034 INVITE sip:36901@172.16.200.70 SIP/2.0 Via: SIP/2.0/UDP 172.16.110.11:5060;branch=z9hG4bK-524287-1---40899843a71e8a3d;rport Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK658017856 Max-Forwards: 69 Record-Route: Contact: To: From: ;tag=637260520 Call-ID: 1790710448 CSeq: 20 INVITE Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, REFER, NOTIFY, INFO, UPDATE, PRACK, SUBSCRIBE Content-Type: application/sdp Supported: replaces, timer, 100rel User-Agent: eXosip/5.3.0 Allow-Events: conference X-Endpoint-Type: PRI Content-Length: 359 v=0 o=gateway 0 63 IN IP4 172.16.110.11 s=conversation c=IN IP4 172.16.110.11 t=0 0 m=audio 10126 RTP/AVP 8 0 9 4 18 101 13 98 a=rtpmap:8 PCMA/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:9 G722/8000 a=rtpmap:4 G723/8000 a=rtpmap:18 G729/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=rtpmap:13 CN/8000 a=rtpmap:98 PCMA/8000 a=gpmd:98 vbd=yes 03:47:00.434703 IP (tos 0xa,ECT(0), ttl 61, id 62599, offset 0, flags [DF], proto UDP (17), length 488) 172.16.200.70.5060 > 172.16.110.11.5060: SIP, length: 460 SIP/2.0 100 Trying Via: SIP/2.0/UDP 172.16.110.11:5060;received=172.16.110.11;branch=z9hG4bK-524287-1---40899843a71e8a3d;rport=5060 Via: SIP/2.0/UDP 127.0.0.1:6060;branch=z9hG4bK658017856;rport=6060 Record-Route: To: ;tag=17634371990008A009 From: ;tag=637260520 Contact: Call-ID: 1790710448 CSeq: 20 INVITE Content-Length: 0 03:47:00.601620 IP (tos 0xa,ECT(0), ttl 61, id 62621, offset 0, flags [DF], proto UDP (17), length 806) 172.16.200.70.5060 > 172.16.110.11.5060: SIP, length: 778 SIP/2.0 180 Ringing Via: SIP/2.0/UDP 172.16.110.11:5060;received=172.16.110.11;branch=z9hG4bK-524287-1---40899843a71e8a3d;rport=5060 Via: SIP/2.0/UDP 127.0.0.1:6060;branch=z9hG4bK658017856;rport=6060 Record-Route: To: ;tag=17634371990008A009 From: ;tag=637260520 Contact: Call-ID: 1790710448 CSeq: 20 INVITE RSeq: 25 Allow: INVITE,CANCEL,ACK,BYE,INFO,PRACK,UPDATE,NOTIFY,MESSAGE,REFER,OPTIONS Require: 100rel Session-ID: 74978e2716fe4890b6a35317adf9b600 Content-Type: application/sdp Content-Length: 134 v=0 o=mkd 1763437049 1 IN IP4 172.16.200.70 s=protei c=IN IP4 172.16.200.70 t=0 0 m=audio 21728 RTP/AVP 8 a=rtpmap:8 PCMA/8000 03:47:00.647556 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 487) 172.16.110.11.5060 > 172.16.200.70.5060: SIP, length: 459 PRACK sip:36901@172.16.200.70:5060 SIP/2.0 Via: SIP/2.0/UDP 172.16.110.11:5060;branch=z9hG4bK-524287-1---f4630468c7b7170c;rport Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK1029555417 Max-Forwards: 69 Contact: To: ;tag=17634371990008A009 From: ;tag=637260520 Call-ID: 1790710448 CSeq: 21 PRACK User-Agent: eXosip/5.3.0 RAck: 25 20 INVITE Content-Length: 0 03:47:00.650632 IP (tos 0xa,ECT(0), ttl 61, id 62628, offset 0, flags [DF], proto UDP (17), length 443) 172.16.200.70.5060 > 172.16.110.11.5060: SIP, length: 415 SIP/2.0 200 OK Via: SIP/2.0/UDP 172.16.110.11:5060;received=172.16.110.11;branch=z9hG4bK-524287-1---f4630468c7b7170c;rport=5060 Via: SIP/2.0/UDP 127.0.0.1:6060;branch=z9hG4bK1029555417;rport=6060 Record-Route: To: ;tag=17634371990008A009 From: ;tag=637260520 Call-ID: 1790710448 CSeq: 21 PRACK Content-Length: 0 03:47:03.429835 IP (tos 0xa,ECT(0), ttl 61, id 62950, offset 0, flags [DF], proto UDP (17), length 774) 172.16.200.70.5060 > 172.16.110.11.5060: SIP, length: 746 SIP/2.0 200 OK Via: SIP/2.0/UDP 172.16.110.11:5060;received=172.16.110.11;branch=z9hG4bK-524287-1---40899843a71e8a3d;rport=5060 Via: SIP/2.0/UDP 127.0.0.1:6060;branch=z9hG4bK658017856;rport=6060 Record-Route: To: ;tag=17634371990008A009 From: ;tag=637260520 Contact: Call-ID: 1790710448 CSeq: 20 INVITE Allow: INVITE,CANCEL,ACK,BYE,INFO,PRACK,UPDATE,NOTIFY,MESSAGE,REFER,OPTIONS Session-ID: 74978e2716fe4890b6a35317adf9b600 Content-Type: application/sdp Content-Length: 134 v=0 o=mkd 1763437049 1 IN IP4 172.16.200.70 s=protei c=IN IP4 172.16.200.70 t=0 0 m=audio 21728 RTP/AVP 8 a=rtpmap:8 PCMA/8000 03:47:03.482137 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 462) 172.16.110.11.5060 > 172.16.200.70.5060: SIP, length: 434 ACK sip:36901@172.16.200.70:5060 SIP/2.0 Via: SIP/2.0/UDP 172.16.110.11:5060;branch=z9hG4bK-524287-1---7ec017359678974b;rport Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK649241216 Max-Forwards: 69 Contact: To: ;tag=17634371990008A009 From: ;tag=637260520 Call-ID: 1790710448 CSeq: 20 ACK User-Agent: eXosip/5.3.0 Content-Length: 0 03:47:03.485833 IP (tos 0xa,ECT(0), ttl 61, id 62955, offset 0, flags [DF], proto UDP (17), length 744) 172.16.200.70.5060 > 172.16.110.11.5060: SIP, length: 716 INVITE sip:35277@127.0.0.1:6060 SIP/2.0 Via: SIP/2.0/UDP 172.16.200.70:5060;branch=z9hG4bK_a3Kr_1763437202152X0007E46C Route: To: ;tag=637260520 From: ;tag=17634371990008A009 Contact: Call-ID: 1790710448 CSeq: 1000 INVITE Max-Forwards: 70 Allow: INVITE,CANCEL,ACK,BYE,INFO,PRACK,UPDATE,NOTIFY,MESSAGE,REFER,OPTIONS Content-Type: application/sdp Content-Length: 214 v=0 o=mkd 1763437049 2 IN IP4 172.29.100.21 s=protei c=IN IP4 172.29.100.21 t=0 0 m=audio 12238 RTP/AVP 8 101 a=rtpmap:8 PCMA/8000 a=ptime:20 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=sendrecv 03:47:03.498711 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 471) 172.16.110.11.5060 > 172.16.200.70.5060: SIP, length: 443 SIP/2.0 407 Proxy Authentication Required Via: SIP/2.0/UDP 172.16.200.70:5060;branch=z9hG4bK_a3Kr_1763437202152X0007E46C Proxy-Authenticate: Digest nonce="1763437623:8c6e69aeb8bef2e25e77c88d717c22a7",algorithm=MD5,realm="172.16.110.11",qop="auth,auth-int" To: ;tag=637260520 From: ;tag=17634371990008A009 Call-ID: 1790710448 CSeq: 1000 INVITE Server: repro 1.12.0 Content-Length: 0 03:47:03.501826 IP (tos 0xa,ECT(0), ttl 61, id 62958, offset 0, flags [DF], proto UDP (17), length 323) 172.16.200.70.5060 > 172.16.110.11.5060: SIP, length: 295 ACK sip:35277@127.0.0.1:6060 SIP/2.0 Via: SIP/2.0/UDP 172.16.200.70:5060;branch=z9hG4bK_a3Kr_1763437202152X0007E46C To: ;tag=637260520 From: ;tag=17634371990008A009 Call-ID: 1790710448 CSeq: 1000 ACK Max-Forwards: 70 Content-Length: 0 03:47:03.502826 IP (tos 0xa,ECT(0), ttl 61, id 62959, offset 0, flags [DF], proto UDP (17), length 397) 172.16.200.70.5060 > 172.16.110.11.5060: SIP, length: 369 BYE sip:35277@127.0.0.1:6060 SIP/2.0 Via: SIP/2.0/UDP 172.16.200.70:5060;branch=z9hG4bK_a3Kr_1763437202168X0007E46D Route: To: ;tag=637260520 From: ;tag=17634371990008A009 Call-ID: 1790710448 CSeq: 1001 BYE Max-Forwards: 70 Reason: Q.850;cause=34 Content-Length: 0 03:47:03.547904 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 331) 172.16.110.11.5060 > 172.16.200.70.5060: SIP, length: 303 SIP/2.0 200 OK Via: SIP/2.0/UDP 172.16.200.70:5060;branch=z9hG4bK_a3Kr_1763437202168X0007E46D To: ;tag=637260520 From: ;tag=17634371990008A009 Call-ID: 1790710448 CSeq: 1001 BYE Server: repro 1.12.0 User-Agent: eXosip/5.3.0 Content-Length: 0 03:47:08.264215 IP (tos 0xa,ECT(0), ttl 61, id 64005, offset 0, flags [DF], proto UDP (17), length 372) 172.16.200.70.5060 > 172.16.110.11.5060: SIP, length: 344 OPTIONS sip:172.16.110.11:5060 SIP/2.0 Via: SIP/2.0/UDP 172.16.200.70:5060;branch=z9hG4bK_a3Kr_1763437206929X0007E470 To: From: ;tag=17634372060008A00D Contact: Call-ID: 691BEA96E2D2E0007E330_172.16.200.70 CSeq: 100 OPTIONS Max-Forwards: 70 Content-Length: 0 03:47:08.274475 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 343) 172.16.110.11.5060 > 172.16.200.70.5060: SIP, length: 315 SIP/2.0 200 OK Via: SIP/2.0/UDP 172.16.200.70:5060;branch=z9hG4bK_a3Kr_1763437206929X0007E470 Contact: To: ;tag=d8b00c50 From: ;tag=17634372060008A00D Call-ID: 691BEA96E2D2E0007E330_172.16.200.70 CSeq: 100 OPTIONS Content-Length: 0 03:47:23.275159 IP (tos 0xa,ECT(0), ttl 61, id 1452, offset 0, flags [DF], proto UDP (17), length 372) 172.16.200.70.5060 > 172.16.110.11.5060: SIP, length: 344 OPTIONS sip:172.16.110.11:5060 SIP/2.0 Via: SIP/2.0/UDP 172.16.200.70:5060;branch=z9hG4bK_a3Kr_1763437221943X0007E473 To: From: ;tag=17634372210008A010 Contact: Call-ID: 691BEAA5E66910007E333_172.16.200.70 CSeq: 100 OPTIONS Max-Forwards: 70 Content-Length: 0 03:47:23.286607 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 343) 172.16.110.11.5060 > 172.16.200.70.5060: SIP, length: 315 SIP/2.0 200 OK Via: SIP/2.0/UDP 172.16.200.70:5060;branch=z9hG4bK_a3Kr_1763437221943X0007E473 Contact: To: ;tag=8546cf0f From: ;tag=17634372210008A010 Call-ID: 691BEAA5E66910007E333_172.16.200.70 CSeq: 100 OPTIONS Content-Length: 0 16 packets captured 16 packets received by filter 0 packets dropped by kernel root@comcerto:~#