root@comcerto:~# tcpdump -i any port 5060 -vvv
tcpdump: listening on any, link-type LINUX_SLL (Linux cooked v1), capture size 262144 bytes

0 packets captured
0 packets received by filter
0 packets dropped by kernel
root@comcerto:~# tcpdump -i any port 5060 or port 6060 -vvv
tcpdump: listening on any, link-type LINUX_SLL (Linux cooked v1), capture size 262144 bytes
07:02:26.697956 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1000)
    192.168.20.145.5060 > 192.168.20.144.5060: [udp sum ok] SIP, length: 972
        INVITE sip:22@192.168.20.144:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK2731092598
        From: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        To: <sip:22@192.168.20.144:5060>
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 1 INVITE
        Contact: <sip:11@192.168.20.145:5060>
        Content-Type: application/sdp
        Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY, REGISTER, SUBSCRIBE, REFER, PUBLISH, UPDATE, MESSAGE
        Max-Forwards: 70
        User-Agent: Yealink SIP-T21P_E2 52.82.14.1
        Supported: timer
        Session-Expires: 300;refresher=uac
        Min-SE: 90
        Allow-Events: talk,hold,conference,refer,check-sync
        Supported: replaces
        Content-Length: 310

        v=0
        o=- 20010 20010 IN IP4 192.168.20.145
        s=SDP data
        c=IN IP4 192.168.20.145
        t=0 0
        m=audio 11858 RTP/AVP 9 0 8 18 101
        a=rtpmap:9 G722/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:18 G729/8000
        a=fmtp:18 annexb=no
        a=ptime:20
        a=sendrecv
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15
07:02:26.709735 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 470)
    192.168.20.144.5060 > 192.168.20.145.5060: [udp sum ok] SIP, length: 442
        SIP/2.0 407 Proxy Authentication Required
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK2731092598
        Proxy-Authenticate: Digest nonce="1757574146:ff779fcf0b64c423be90f18088293368",algorithm=MD5,realm="192.168.20.144",qop="auth,auth-int"
        To: <sip:22@192.168.20.144:5060>;tag=9e3d852b
        From: "11"<sip:11@192.168.20.144:5060>;tag=4044204411
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 1 INVITE
        Server: repro 1.12.0
        Content-Length: 0

07:02:26.713959 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 306)
    192.168.20.145.5060 > 192.168.20.144.5060: [udp sum ok] SIP, length: 278
        ACK sip:22@192.168.20.144:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK2731092598
        From: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        To: <sip:22@192.168.20.144:5060>;tag=9e3d852b
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 1 ACK
        Content-Length: 0

07:02:26.721978 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1256)
    192.168.20.145.5060 > 192.168.20.144.5060: [udp sum ok] SIP, length: 1228
        INVITE sip:22@192.168.20.144:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK3538034718
        From: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        To: <sip:22@192.168.20.144:5060>
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 INVITE
        Contact: <sip:11@192.168.20.145:5060>
        Proxy-Authorization: Digest username="11", realm="192.168.20.144", nonce="1757574146:ff779fcf0b64c423be90f18088293368", uri="sip:22@192.168.20.144:5060", response="893dcadb9670385eca766d86cb545283", algorithm=MD5, cnonce="0a4f113b", qop=auth, nc=00000001
        Content-Type: application/sdp
        Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY, REGISTER, SUBSCRIBE, REFER, PUBLISH, UPDATE, MESSAGE
        Max-Forwards: 70
        User-Agent: Yealink SIP-T21P_E2 52.82.14.1
        Supported: timer
        Session-Expires: 300;refresher=uac
        Min-SE: 90
        Allow-Events: talk,hold,conference,refer,check-sync
        Supported: replaces
        Content-Length: 310

        v=0
        o=- 20010 20010 IN IP4 192.168.20.145
        s=SDP data
        c=IN IP4 192.168.20.145
        t=0 0
        m=audio 11858 RTP/AVP 9 0 8 18 101
        a=rtpmap:9 G722/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:18 G729/8000
        a=fmtp:18 annexb=no
        a=ptime:20
        a=sendrecv
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15
07:02:26.749420 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1141)
    localhost..5060 > localhost..6060: [bad udp cksum 0x0275 -> 0x6c61!] SIP, length: 1113
        INVITE sip:22@127.0.0.1:6060;transport=udp SIP/2.0
        Via: SIP/2.0/UDP 127.0.0.1:5060;branch=z9hG4bK-524287-1---9b2d62604ef0e34c;rport
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK3538034718
        Max-Forwards: 69
        Record-Route: <sip:192.168.20.144:5060;transport=udp;lr>
        Contact: <sip:11@192.168.20.145:5060>
        To: <sip:22@192.168.20.144:5060>
        From: "11"<sip:11@192.168.20.144:5060>;tag=4044204411
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 INVITE
        Session-Expires: 300;refresher=uac
        Min-SE: 90
        Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY, REGISTER, SUBSCRIBE, REFER, PUBLISH, UPDATE, MESSAGE
        Content-Type: application/sdp
        Supported: timer, replaces
        User-Agent: Yealink SIP-T21P_E2 52.82.14.1
        Allow-Events: talk, hold, conference, refer, check-sync
        Content-Length: 310

        v=0
        o=- 20010 20010 IN IP4 192.168.20.145
        s=SDP data
        c=IN IP4 192.168.20.145
        t=0 0
        m=audio 11858 RTP/AVP 9 0 8 18 101
        a=rtpmap:9 G722/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:18 G729/8000
        a=fmtp:18 annexb=no
        a=ptime:20
        a=sendrecv
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15
07:02:26.761244 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 389)
    localhost..6060 > localhost..5060: [bad udp cksum 0xff84 -> 0x5326!] SIP, length: 361
        SIP/2.0 100 Trying
        Via: SIP/2.0/UDP 127.0.0.1:5060;branch=z9hG4bK-524287-1---9b2d62604ef0e34c;rport=5060
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK3538034718
        From: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        To: <sip:22@192.168.20.144:5060>
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 INVITE
        User-Agent: eXosip/5.3.0
        Content-Length: 0

07:02:26.800284 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 681)
    localhost..6060 > localhost..5060: [bad udp cksum 0x00a9 -> 0x1edf!] SIP, length: 653
        SIP/2.0 180 Ringing
        Via: SIP/2.0/UDP 127.0.0.1:5060;branch=z9hG4bK-524287-1---9b2d62604ef0e34c;rport=5060
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK3538034718
        Record-Route: <sip:192.168.20.144:5060;transport=udp;lr>
        From: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        To: <sip:22@192.168.20.144:5060>;tag=461241907
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 INVITE
        Contact: <sip:22@127.0.0.1:6060>
        Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,REFER,NOTIFY,INFO,UPDATE,PRACK,SUBSCRIBE
        User-Agent: eXosip/5.3.0
        Allow-Events: conference
        Supported: replaces,timer,100rel
        P-Asserted-Identity: <sip:22@192.168.20.144>
        Content-Length: 0

07:02:26.815191 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 276)
    192.168.20.144.5060 > 192.168.20.145.5060: [udp sum ok] SIP, length: 248
        SIP/2.0 100 Trying
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK3538034718
        To: <sip:22@192.168.20.144:5060>
        From: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 INVITE
        Content-Length: 0

07:02:26.815587 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 628)
    192.168.20.144.5060 > 192.168.20.145.5060: [udp sum ok] SIP, length: 600
        SIP/2.0 180 Ringing
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK3538034718
        Record-Route: <sip:192.168.20.144:5060;transport=udp;lr>
        Contact: <sip:22@127.0.0.1:6060>
        To: <sip:22@192.168.20.144:5060>;tag=461241907
        From: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 INVITE
        Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, REFER, NOTIFY, INFO, UPDATE, PRACK, SUBSCRIBE
        Server: repro 1.12.0
        Supported: replaces, timer, 100rel
        User-Agent: eXosip/5.3.0
        Allow-Events: conference
        P-Asserted-Identity: <sip:22@192.168.20.144>
        Content-Length: 0

07:02:30.167088 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 991)
    localhost..6060 > localhost..5060: [bad udp cksum 0x01df -> 0x51fa!] SIP, length: 963
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 127.0.0.1:5060;branch=z9hG4bK-524287-1---9b2d62604ef0e34c;rport=5060
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK3538034718
        Record-Route: <sip:192.168.20.144:5060;transport=udp;lr>
        From: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        To: <sip:22@192.168.20.144:5060>;tag=461241907
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 INVITE
        Contact: <sip:22@127.0.0.1:6060>
        Content-Type: application/sdp
        Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,REFER,NOTIFY,INFO,UPDATE,PRACK,SUBSCRIBE
        Session-expires: 300;refresher=uac
        User-Agent: eXosip/5.3.0
        Allow-Events: conference
        Supported: replaces,timer,100rel
        X-Endpoint-Type: FS01
        P-Asserted-Identity: <sip:22@192.168.20.144>
        Require: timer
        Content-Length:   205

        v=0
        o=gateway 0 0 IN IP4 192.168.20.144
        s=conversation
        c=IN IP4 192.168.20.144
        t=0 0
        m=audio 10508 RTP/AVP 9 101
        a=rtpmap:9 G722/8000
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15
        a=sendrecv
07:02:30.178693 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 936)
    192.168.20.144.5060 > 192.168.20.145.5060: [udp sum ok] SIP, length: 908
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK3538034718
        Record-Route: <sip:192.168.20.144:5060;transport=udp;lr>
        Require: timer
        Contact: <sip:22@127.0.0.1:6060>
        To: <sip:22@192.168.20.144:5060>;tag=461241907
        From: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 INVITE
        Session-Expires: 300;refresher=uac
        Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, REFER, NOTIFY, INFO, UPDATE, PRACK, SUBSCRIBE
        Content-Type: application/sdp
        Server: repro 1.12.0
        Supported: replaces, timer, 100rel
        User-Agent: eXosip/5.3.0
        Allow-Events: conference
        P-Asserted-Identity: <sip:22@192.168.20.144>
        X-Endpoint-Type: FS01
        Content-Length: 205

        v=0
        o=gateway 0 0 IN IP4 192.168.20.144
        s=conversation
        c=IN IP4 192.168.20.144
        t=0 0
        m=audio 10508 RTP/AVP 9 101
        a=rtpmap:9 G722/8000
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15
        a=sendrecv
07:02:30.192697 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 710)
    192.168.20.145.5060 > 192.168.20.144.5060: [udp sum ok] SIP, length: 682
        ACK sip:22@127.0.0.1:6060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK2189259537
        Route: <sip:192.168.20.144:5060;transport=udp;lr>
        From: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        To: <sip:22@192.168.20.144:5060>;tag=461241907
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 ACK
        Contact: <sip:11@192.168.20.145:5060>
        Proxy-Authorization: Digest username="11", realm="192.168.20.144", nonce="1757574146:ff779fcf0b64c423be90f18088293368", uri="sip:22@192.168.20.144:5060", response="893dcadb9670385eca766d86cb545283", algorithm=MD5, cnonce="0a4f113b", qop=auth, nc=00000001
        Max-Forwards: 70
        User-Agent: Yealink SIP-T21P_E2 52.82.14.1
        Content-Length: 0

07:02:30.203258 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 741)
    localhost..5060 > localhost..6060: [bad udp cksum 0x00e5 -> 0x9e14!] SIP, length: 713
        ACK sip:22@127.0.0.1:6060 SIP/2.0
        Via: SIP/2.0/UDP 127.0.0.1:5060;branch=z9hG4bK-524287-1---f3e4b60bb123a848;rport
        Via: SIP/2.0/UDP 192.168.20.145:5060;branch=z9hG4bK2189259537
        Max-Forwards: 69
        Contact: <sip:11@192.168.20.145:5060>
        To: <sip:22@192.168.20.144:5060>;tag=461241907
        From: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 ACK
        Proxy-Authorization: Digest username="11", realm="192.168.20.144", nonce="1757574146:ff779fcf0b64c423be90f18088293368", uri="sip:22@192.168.20.144:5060", response="893dcadb9670385eca766d86cb545283", algorithm=MD5, cnonce="0a4f113b", qop=auth, nc=00000001
        User-Agent: Yealink SIP-T21P_E2 52.82.14.1
        Content-Length: 0

07:02:31.056619 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 32)
    192.168.20.145.5060 > 192.168.20.144.5060: [udp sum ok] SIP
07:02:40.515591 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 403)
    localhost..6060 > localhost..5060: [bad udp cksum 0xff92 -> 0xc4d3!] SIP, length: 375
        BYE sip:11@192.168.20.145:5060 SIP/2.0
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport;branch=z9hG4bK1825194370
        Route: <sip:192.168.20.144:5060;transport=udp;lr>
        From: <sip:22@192.168.20.144:5060>;tag=461241907
        To: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 BYE
        Max-Forwards: 70
        User-Agent: eXosip/5.3.0
        Content-Length: 0

07:02:40.537870 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 444)
    192.168.20.144.5060 > 192.168.20.145.5060: [udp sum ok] SIP, length: 416
        BYE sip:11@192.168.20.145:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.20.144:5060;branch=z9hG4bK-524287-1---4104311d73a79631;rport
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK1825194370
        Max-Forwards: 69
        To: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        From: <sip:22@192.168.20.144:5060>;tag=461241907
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 BYE
        User-Agent: eXosip/5.3.0
        Content-Length: 0

07:02:40.543685 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 425)
    192.168.20.145.5060 > 192.168.20.144.5060: [udp sum ok] SIP, length: 397
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 192.168.20.144:5060;branch=z9hG4bK-524287-1---4104311d73a79631;rport=5060
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK1825194370
        From: <sip:22@192.168.20.144:5060>;tag=461241907
        To: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 BYE
        User-Agent: Yealink SIP-T21P_E2 52.82.14.1
        Content-Length: 0

07:02:40.553795 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 355)
    localhost..5060 > localhost..6060: [bad udp cksum 0xff62 -> 0x5a1c!] SIP, length: 327
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK1825194370
        To: "11" <sip:11@192.168.20.144:5060>;tag=4044204411
        From: <sip:22@192.168.20.144:5060>;tag=461241907
        Call-ID: 0_2164660753@192.168.20.145
        CSeq: 2 BYE
        Server: repro 1.12.0
        User-Agent: Yealink SIP-T21P_E2 52.82.14.1
        Content-Length: 0


18 packets captured
25 packets received by filter
0 packets dropped by kernel
root@comcerto:~#