root@comcerto:/# tcpdump -i any port 5060 -v
tcpdump: listening on any, link-type LINUX_SLL (Linux cooked v1), capture size 262144 bytes
09:06:20.990648 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1016)
    localhost..6060 > localhost..5060: SIP, length: 988
        INVITE sip:22@192.168.20.120 SIP/2.0
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport;branch=z9hG4bK545407604
        From: <sip:11@192.168.20.120>;tag=1229636896
        To: <sip:22@192.168.20.120>
        Call-ID: 1867042606
        CSeq: 20 INVITE
        Contact: <sip:11@127.0.0.1:6060>
        Content-Type: application/sdp
        Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,REFER,NOTIFY,INFO,UPDATE,PRACK,SUBSCRIBE
        Max-Forwards: 70
        User-Agent: eXosip/5.3.0
        X-Endpoint-Type: FS01
        Allow-Events: conference
        Supported: replaces,timer,100rel
        Content-Length:   478

        v=0
        o=gateway 0 3 IN IP4 192.168.20.120
        s=conversation
        c=IN IP4 192.168.20.120
        t=0 0
        m=audio 10508 RTP/AVP 8 0 4 9 18 100 96 99 97 101 13 98
        a=rtpmap:8 PCMA/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:9 G722/8000
        a=rtpmap:18 G729/8000
        a=rtpmap:100 G726-40/8000
        a=rtpmap:96 G726-32/8000
        a=rtpmap:99 G726-24/8000
        a=rtpmap:97 G726-16/8000
        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
09:06:21.018664 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1189)
    192.168.20.120.5060 > 192.168.0.124.5060: SIP, length: 1161
        INVITE sip:22@192.168.0.124:5060;line=255 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.120:5060;branch=z9hG4bK-524287-1---ff16916dd2e7f057;rport
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK545407604
        Max-Forwards: 69
        Record-Route: <sip:192.168.20.120:5060;transport=udp;lr>
        Contact: <sip:11@127.0.0.1:6060>
        To: <sip:22@192.168.20.120>
        From: <sip:11@192.168.20.120>;tag=1229636896
        Call-ID: 1867042606
        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: FS01
        Content-Length: 478

        v=0
        o=gateway 0 3 IN IP4 192.168.20.120
        s=conversation
        c=IN IP4 192.168.20.120
        t=0 0
        m=audio 10508 RTP/AVP 8 0 4 9 18 100 96 99 97 101 13 98
        a=rtpmap:8 PCMA/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:9 G722/8000
        a=rtpmap:18 G729/8000
        a=rtpmap:100 G726-40/8000
        a=rtpmap:96 G726-32/8000
        a=rtpmap:99 G726-24/8000
        a=rtpmap:97 G726-16/8000
        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
09:06:21.102715 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 250)
    localhost..5060 > localhost..6060: SIP, length: 222
        SIP/2.0 100 Trying
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK545407604
        To: <sip:22@192.168.20.120>
        From: <sip:11@192.168.20.120>;tag=1229636896
        Call-ID: 1867042606
        CSeq: 20 INVITE
        Content-Length: 0

09:06:21.526627 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1189)
    192.168.20.120.5060 > 192.168.0.124.5060: SIP, length: 1161
        INVITE sip:22@192.168.0.124:5060;line=255 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.120:5060;branch=z9hG4bK-524287-1---ff16916dd2e7f057;rport
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK545407604
        Max-Forwards: 69
        Record-Route: <sip:192.168.20.120:5060;transport=udp;lr>
        Contact: <sip:11@127.0.0.1:6060>
        To: <sip:22@192.168.20.120>
        From: <sip:11@192.168.20.120>;tag=1229636896
        Call-ID: 1867042606
        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: FS01
        Content-Length: 478

        v=0
        o=gateway 0 3 IN IP4 192.168.20.120
        s=conversation
        c=IN IP4 192.168.20.120
        t=0 0
        m=audio 10508 RTP/AVP 8 0 4 9 18 100 96 99 97 101 13 98
        a=rtpmap:8 PCMA/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:9 G722/8000
        a=rtpmap:18 G729/8000
        a=rtpmap:100 G726-40/8000
        a=rtpmap:96 G726-32/8000
        a=rtpmap:99 G726-24/8000
        a=rtpmap:97 G726-16/8000
        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
09:06:22.542576 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1189)
    192.168.20.120.5060 > 192.168.0.124.5060: SIP, length: 1161
        INVITE sip:22@192.168.0.124:5060;line=255 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.120:5060;branch=z9hG4bK-524287-1---ff16916dd2e7f057;rport
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK545407604
        Max-Forwards: 69
        Record-Route: <sip:192.168.20.120:5060;transport=udp;lr>
        Contact: <sip:11@127.0.0.1:6060>
        To: <sip:22@192.168.20.120>
        From: <sip:11@192.168.20.120>;tag=1229636896
        Call-ID: 1867042606
        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: FS01
        Content-Length: 478

        v=0
        o=gateway 0 3 IN IP4 192.168.20.120
        s=conversation
        c=IN IP4 192.168.20.120
        t=0 0
        m=audio 10508 RTP/AVP 8 0 4 9 18 100 96 99 97 101 13 98
        a=rtpmap:8 PCMA/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:9 G722/8000
        a=rtpmap:18 G729/8000
        a=rtpmap:100 G726-40/8000
        a=rtpmap:96 G726-32/8000
        a=rtpmap:99 G726-24/8000
        a=rtpmap:97 G726-16/8000
        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
09:06:24.522571 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1189)
    192.168.20.120.5060 > 192.168.0.124.5060: SIP, length: 1161
        INVITE sip:22@192.168.0.124:5060;line=255 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.120:5060;branch=z9hG4bK-524287-1---ff16916dd2e7f057;rport
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK545407604
        Max-Forwards: 69
        Record-Route: <sip:192.168.20.120:5060;transport=udp;lr>
        Contact: <sip:11@127.0.0.1:6060>
        To: <sip:22@192.168.20.120>
        From: <sip:11@192.168.20.120>;tag=1229636896
        Call-ID: 1867042606
        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: FS01
        Content-Length: 478

        v=0
        o=gateway 0 3 IN IP4 192.168.20.120
        s=conversation
        c=IN IP4 192.168.20.120
        t=0 0
        m=audio 10508 RTP/AVP 8 0 4 9 18 100 96 99 97 101 13 98
        a=rtpmap:8 PCMA/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:9 G722/8000
        a=rtpmap:18 G729/8000
        a=rtpmap:100 G726-40/8000
        a=rtpmap:96 G726-32/8000
        a=rtpmap:99 G726-24/8000
        a=rtpmap:97 G726-16/8000
        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
09:06:28.542615 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1189)
    192.168.20.120.5060 > 192.168.0.124.5060: SIP, length: 1161
        INVITE sip:22@192.168.0.124:5060;line=255 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.120:5060;branch=z9hG4bK-524287-1---ff16916dd2e7f057;rport
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK545407604
        Max-Forwards: 69
        Record-Route: <sip:192.168.20.120:5060;transport=udp;lr>
        Contact: <sip:11@127.0.0.1:6060>
        To: <sip:22@192.168.20.120>
        From: <sip:11@192.168.20.120>;tag=1229636896
        Call-ID: 1867042606
        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: FS01
        Content-Length: 478

        v=0
        o=gateway 0 3 IN IP4 192.168.20.120
        s=conversation
        c=IN IP4 192.168.20.120
        t=0 0
        m=audio 10508 RTP/AVP 8 0 4 9 18 100 96 99 97 101 13 98
        a=rtpmap:8 PCMA/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:9 G722/8000
        a=rtpmap:18 G729/8000
        a=rtpmap:100 G726-40/8000
        a=rtpmap:96 G726-32/8000
        a=rtpmap:99 G726-24/8000
        a=rtpmap:97 G726-16/8000
        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
09:06:36.522677 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1189)
    192.168.20.120.5060 > 192.168.0.124.5060: SIP, length: 1161
        INVITE sip:22@192.168.0.124:5060;line=255 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.120:5060;branch=z9hG4bK-524287-1---ff16916dd2e7f057;rport
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK545407604
        Max-Forwards: 69
        Record-Route: <sip:192.168.20.120:5060;transport=udp;lr>
        Contact: <sip:11@127.0.0.1:6060>
        To: <sip:22@192.168.20.120>
        From: <sip:11@192.168.20.120>;tag=1229636896
        Call-ID: 1867042606
        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: FS01
        Content-Length: 478

        v=0
        o=gateway 0 3 IN IP4 192.168.20.120
        s=conversation
        c=IN IP4 192.168.20.120
        t=0 0
        m=audio 10508 RTP/AVP 8 0 4 9 18 100 96 99 97 101 13 98
        a=rtpmap:8 PCMA/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:9 G722/8000
        a=rtpmap:18 G729/8000
        a=rtpmap:100 G726-40/8000
        a=rtpmap:96 G726-32/8000
        a=rtpmap:99 G726-24/8000
        a=rtpmap:97 G726-16/8000
        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
09:06:52.542592 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1189)
    192.168.20.120.5060 > 192.168.0.124.5060: SIP, length: 1161
        INVITE sip:22@192.168.0.124:5060;line=255 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.120:5060;branch=z9hG4bK-524287-1---ff16916dd2e7f057;rport
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK545407604
        Max-Forwards: 69
        Record-Route: <sip:192.168.20.120:5060;transport=udp;lr>
        Contact: <sip:11@127.0.0.1:6060>
        To: <sip:22@192.168.20.120>
        From: <sip:11@192.168.20.120>;tag=1229636896
        Call-ID: 1867042606
        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: FS01
        Content-Length: 478

        v=0
        o=gateway 0 3 IN IP4 192.168.20.120
        s=conversation
        c=IN IP4 192.168.20.120
        t=0 0
        m=audio 10508 RTP/AVP 8 0 4 9 18 100 96 99 97 101 13 98
        a=rtpmap:8 PCMA/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:9 G722/8000
        a=rtpmap:18 G729/8000
        a=rtpmap:100 G726-40/8000
        a=rtpmap:96 G726-32/8000
        a=rtpmap:99 G726-24/8000
        a=rtpmap:97 G726-16/8000
        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
09:06:53.022231 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 272)
    localhost..5060 > localhost..6060: SIP, length: 244
        SIP/2.0 408 Request Timeout
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK545407604
        To: <sip:22@192.168.20.120>;tag=37029a3f
        From: <sip:11@192.168.20.120>;tag=1229636896
        Call-ID: 1867042606
        CSeq: 20 INVITE
        Content-Length: 0

09:06:53.026573 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 270)
    localhost..6060 > localhost..5060: SIP, length: 242
        ACK sip:22@192.168.20.120 SIP/2.0
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport;branch=z9hG4bK545407604
        From: <sip:11@192.168.20.120>;tag=1229636896
        To: <sip:22@192.168.20.120>;tag=37029a3f
        Call-ID: 1867042606
        CSeq: 20 ACK
        Content-Length: 0


11 packets captured
15 packets received by filter
0 packets dropped by kernel
root@comcerto:/#