root@comcerto:~# tcpdump -v -s1514 port 5060
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 1514 bytes
12:33:38.121094 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 32)
    192.168.0.79.5060 > 192.168.0.4.5060: SIP, length: 4



12:33:38.722109 IP (tos 0x68, ttl 64, id 25590, offset 0, flags [DF], proto UDP (17), length 32)
    192.168.0.78.5060 > 192.168.0.4.5060: SIP, length: 4



12:33:39.937145 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 32)
    192.168.0.137.5060 > 192.168.0.4.5060: SIP, length: 4



12:33:40.236205 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1013)
    192.168.0.112.5060 > 192.168.0.4.5060: SIP, length: 985
        INVITE sip:528@192.168.0.4:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK1032884175
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        To: <sip:528@192.168.0.4:5060>
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 1 INVITE
        Contact: <sip:526@192.168.0.112:5060>
        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 52.84.14.7
        Supported: timer
        Session-Expires: 300;refresher=uac
        Min-SE: 90
        Allow-Events: talk,hold,conference,refer,check-sync
        Supported: replaces
        Content-Length: 308

        v=0
        o=- 20062 20062 IN IP4 192.168.0.112
        s=SDP data
        c=IN IP4 192.168.0.112
        t=0 0
        m=audio 12354 RTP/AVP 18 9 106 101
        a=rtpmap:18 G729/8000
        a=fmtp:18 annexb=no
        a=rtpmap:9 G722/8000
        a=rtpmap:106 iLBC/8000
        a=fmtp:106 mode=30
        a=ptime:20
        a=sendrecv
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15

12:33:40.252543 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 484)
    192.168.0.4.5060 > 192.168.0.112.5060: SIP, length: 456
        SIP/2.0 407 Proxy Authentication Required
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK1032884175
        Proxy-Authenticate: Digest nonce="1695904420:afbc91f6ac3a291028912ed6f8175207",algorithm=MD5,realm="192.168.0.4",qop="auth,auth-int"
        To: <sip:528@192.168.0.4:5060>;tag=9e07b309
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4"<sip:526@192.168.0.4:5060>;tag=631926531
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 1 INVITE
        Server: repro 1.12.0
        Content-Length: 0


12:33:40.258157 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 321)
    192.168.0.112.5060 > 192.168.0.4.5060: SIP, length: 293
        ACK sip:528@192.168.0.4:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK1032884175
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        To: <sip:528@192.168.0.4:5060>;tag=9e07b309
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 1 ACK
        Content-Length: 0


12:33:40.272186 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1267)
    192.168.0.112.5060 > 192.168.0.4.5060: SIP, length: 1239
        INVITE sip:528@192.168.0.4:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        To: <sip:528@192.168.0.4:5060>
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 INVITE
        Contact: <sip:526@192.168.0.112:5060>
        Proxy-Authorization: Digest username="526", realm="192.168.0.4", nonce="1695904420:afbc91f6ac3a291028912ed6f8175207", uri="sip:528@192.168.0.4:5060", response="a9412c25d831b56762d4e4e2dfce2f40", algorithm=MD5, cnonce="1680616049", 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 52.84.14.7
        Supported: timer
        Session-Expires: 300;refresher=uac
        Min-SE: 90
        Allow-Events: talk,hold,conference,refer,check-sync
        Supported: replaces
        Content-Length: 308

        v=0
        o=- 20062 20062 IN IP4 192.168.0.112
        s=SDP data
        c=IN IP4 192.168.0.112
        t=0 0
        m=audio 12354 RTP/AVP 18 9 106 101
        a=rtpmap:18 G729/8000
        a=fmtp:18 annexb=no
        a=rtpmap:9 G722/8000
        a=rtpmap:106 iLBC/8000
        a=fmtp:106 mode=30
        a=ptime:20
        a=sendrecv
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15

12:33:40.786203 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1267)
    192.168.0.112.5060 > 192.168.0.4.5060: SIP, length: 1239
        INVITE sip:528@192.168.0.4:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        To: <sip:528@192.168.0.4:5060>
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 INVITE
        Contact: <sip:526@192.168.0.112:5060>
        Proxy-Authorization: Digest username="526", realm="192.168.0.4", nonce="1695904420:afbc91f6ac3a291028912ed6f8175207", uri="sip:528@192.168.0.4:5060", response="a9412c25d831b56762d4e4e2dfce2f40", algorithm=MD5, cnonce="1680616049", 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 52.84.14.7
        Supported: timer
        Session-Expires: 300;refresher=uac
        Min-SE: 90
        Allow-Events: talk,hold,conference,refer,check-sync
        Supported: replaces
        Content-Length: 308

        v=0
        o=- 20062 20062 IN IP4 192.168.0.112
        s=SDP data
        c=IN IP4 192.168.0.112
        t=0 0
        m=audio 12354 RTP/AVP 18 9 106 101
        a=rtpmap:18 G729/8000
        a=fmtp:18 annexb=no
        a=rtpmap:9 G722/8000
        a=rtpmap:106 iLBC/8000
        a=fmtp:106 mode=30
        a=ptime:20
        a=sendrecv
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15

12:33:41.034195 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 32)
    192.168.0.112.5060 > 192.168.0.4.5060: SIP, length: 4



12:33:41.498578 IP (tos 0x0, ttl 64, id 60435, offset 0, flags [+], proto UDP (17), length 1500)
    192.168.0.4.5060 > 192.168.0.71.5060: SIP, length: 1472
        INVITE sip:528@192.168.0.71:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.4:5060;branch=z9hG4bK-524287-1---08d4c04d9aaea016;rport
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        Max-Forwards: 69
        Record-Route: <sip:192.168.0.4:5060;transport=udp;lr>
        Identity: 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
        Identity-Info: <http://:80/cert?domain=192.168.0.4>
        Contact: <sip:526@192.168.0.112:5060>
        To: <sip:528@192.168.0.4:5060>
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4"<sip:526@192.168.0.4:5060>;tag=631926531
        Call-ID: 0_885322584@192.168.0.112
        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
        Date: Thu, 28 Sep 2023 12:33:40 GMT
        Supported: timer,\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00
12:33:41.507230 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 426)
    192.168.0.71.5060 > 192.168.0.4.5060: SIP, length: 398
        SIP/2.0 100 Trying
        Via: SIP/2.0/UDP 192.168.0.4:5060;branch=z9hG4bK-524287-1---08d4c04d9aaea016;rport=5060
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        To: <sip:528@192.168.0.4:5060>
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 INVITE
        User-Agent: Yealink SIP-T21P_E2 52.84.14.1
        Content-Length: 0


12:33:41.516798 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 293)
    192.168.0.4.5060 > 192.168.0.112.5060: SIP, length: 265
        SIP/2.0 100 Trying
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        To: <sip:528@192.168.0.4:5060>
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 INVITE
        Content-Length: 0


12:33:41.517118 IP (tos 0x0, ttl 64, id 60436, offset 0, flags [+], proto UDP (17), length 1500)
    192.168.0.4.5060 > 192.168.0.71.5060: SIP, length: 1472
        INVITE sip:528@192.168.0.71:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.4:5060;branch=z9hG4bK-524287-1---08d4c04d9aaea016;rport
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        Max-Forwards: 69
        Record-Route: <sip:192.168.0.4:5060;transport=udp;lr>
        Identity: 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
        Identity-Info: <http://:80/cert?domain=192.168.0.4>
        Contact: <sip:526@192.168.0.112:5060>
        To: <sip:528@192.168.0.4:5060>
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4"<sip:526@192.168.0.4:5060>;tag=631926531
        Call-ID: 0_885322584@192.168.0.112
        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
        Date: Thu, 28 Sep 2023 12:33:40 GMT
        Supported: timer,\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00
12:33:41.584241 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 705)
    192.168.0.71.5060 > 192.168.0.4.5060: SIP, length: 677
        SIP/2.0 180 Ringing
        Via: SIP/2.0/UDP 192.168.0.4:5060;branch=z9hG4bK-524287-1---08d4c04d9aaea016;rport=5060
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        Record-Route: <sip:192.168.0.4:5060;transport=udp;lr>
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        To: <sip:528@192.168.0.4:5060>;tag=2785734918
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 INVITE
        Contact: <sip:528@192.168.0.71:5060>
        Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY, REGISTER, SUBSCRIBE, REFER, PUBLISH, UPDATE, MESSAGE
        User-Agent: Yealink SIP-T21P_E2 52.84.14.1
        Allow-Events: talk,hold,conference,refer,check-sync
        Content-Length: 0


12:33:41.597719 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 642)
    192.168.0.4.5060 > 192.168.0.112.5060: SIP, length: 614
        SIP/2.0 180 Ringing
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        Record-Route: <sip:192.168.0.4:5060;transport=udp;lr>
        Contact: <sip:528@192.168.0.71:5060>
        To: <sip:528@192.168.0.4:5060>;tag=2785734918
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 INVITE
        Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY, REGISTER, SUBSCRIBE, REFER, PUBLISH, UPDATE, MESSAGE
        Server: repro 1.12.0
        User-Agent: Yealink SIP-T21P_E2 52.84.14.1
        Allow-Events: talk, hold, conference, refer, check-sync
        Content-Length: 0


12:33:42.073235 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 32)
    192.168.0.127.5060 > 192.168.0.4.5060: SIP, length: 4



12:33:42.602214 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 32)
    192.168.0.71.5060 > 192.168.0.4.5060: SIP, length: 4



12:33:44.161287 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1046)
    192.168.0.105.5060 > 192.168.0.4.5060: SIP, length: 1018
        INVITE sip:400@192.168.0.4:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.105:5060;branch=z9hG4bK4283060246
        From: "\0xd0\0x90\0xd0\0xbb\0xd0\0xb5\0xd0\0xba\0xd1\0x81\0xd0\0xb0\0xd0\0xbd\0xd0\0xb4\0xd1\0x80 \0xd0\0x9d\0xd0\0xb0\0xd0\0xb9\0xd0\0xb4\0xd0\0xb0\0xd0\0xbd\0xd0\0xbe\0xd0\0xb2" <sip:527@192.168.0.4:5060>;tag=3126418466
        To: <sip:400@192.168.0.4:5060>
        Call-ID: 0_2715817587@192.168.0.105
        CSeq: 1 INVITE
        Contact: <sip:527@192.168.0.105:5060>
        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 52.80.14.2
        Supported: 100rel
        Supported: timer
        Session-Expires: 300;refresher=uac
        Min-SE: 90
        Allow-Events: talk,hold,conference,refer,check-sync
        Supported: replaces
        Content-Length: 312

        v=0
        o=- 20205 20205 IN IP4 192.168.0.105
        s=SDP data
        c=IN IP4 192.168.0.105
        t=0 0
        m=audio 12328 RTP/AVP 9 8 18 106 101
        a=rtpmap:9 G722/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:18 G729/8000
        a=fmtp:18 annexb=no
        a=rtpmap:106 iLBC/8000
        a=ptime:20
        a=sendrecv
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15

12:33:44.177515 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 494)
    192.168.0.4.5060 > 192.168.0.105.5060: SIP, length: 466
        SIP/2.0 407 Proxy Authentication Required
        Via: SIP/2.0/UDP 192.168.0.105:5060;branch=z9hG4bK4283060246
        Proxy-Authenticate: Digest nonce="1695904424:09a1f6e07e68fb508ca665cfe3cba2a7",algorithm=MD5,realm="192.168.0.4",qop="auth,auth-int"
        To: <sip:400@192.168.0.4:5060>;tag=e0f3d360
        From: "\0xd0\0x90\0xd0\0xbb\0xd0\0xb5\0xd0\0xba\0xd1\0x81\0xd0\0xb0\0xd0\0xbd\0xd0\0xb4\0xd1\0x80 \0xd0\0x9d\0xd0\0xb0\0xd0\0xb9\0xd0\0xb4\0xd0\0xb0\0xd0\0xbd\0xd0\0xbe\0xd0\0xb2"<sip:527@192.168.0.4:5060>;tag=3126418466
        Call-ID: 0_2715817587@192.168.0.105
        CSeq: 1 INVITE
        Server: repro 1.12.0
        Content-Length: 0


12:33:44.182272 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 331)
    192.168.0.105.5060 > 192.168.0.4.5060: SIP, length: 303
        ACK sip:400@192.168.0.4:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.105:5060;branch=z9hG4bK4283060246
        From: "\0xd0\0x90\0xd0\0xbb\0xd0\0xb5\0xd0\0xba\0xd1\0x81\0xd0\0xb0\0xd0\0xbd\0xd0\0xb4\0xd1\0x80 \0xd0\0x9d\0xd0\0xb0\0xd0\0xb9\0xd0\0xb4\0xd0\0xb0\0xd0\0xbd\0xd0\0xbe\0xd0\0xb2" <sip:527@192.168.0.4:5060>;tag=3126418466
        To: <sip:400@192.168.0.4:5060>;tag=e0f3d360
        Call-ID: 0_2715817587@192.168.0.105
        CSeq: 1 ACK
        Content-Length: 0


12:33:44.191286 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1298)
    192.168.0.105.5060 > 192.168.0.4.5060: SIP, length: 1270
        INVITE sip:400@192.168.0.4:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.105:5060;branch=z9hG4bK3093223425
        From: "\0xd0\0x90\0xd0\0xbb\0xd0\0xb5\0xd0\0xba\0xd1\0x81\0xd0\0xb0\0xd0\0xbd\0xd0\0xb4\0xd1\0x80 \0xd0\0x9d\0xd0\0xb0\0xd0\0xb9\0xd0\0xb4\0xd0\0xb0\0xd0\0xbd\0xd0\0xbe\0xd0\0xb2" <sip:527@192.168.0.4:5060>;tag=3126418466
        To: <sip:400@192.168.0.4:5060>
        Call-ID: 0_2715817587@192.168.0.105
        CSeq: 2 INVITE
        Contact: <sip:527@192.168.0.105:5060>
        Proxy-Authorization: Digest username="527", realm="192.168.0.4", nonce="1695904424:09a1f6e07e68fb508ca665cfe3cba2a7", uri="sip:400@192.168.0.4:5060", response="8aaeb386b99efd425a00a7ee87adf90f", 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 52.80.14.2
        Supported: 100rel
        Supported: timer
        Session-Expires: 300;refresher=uac
        Min-SE: 90
        Allow-Events: talk,hold,conference,refer,check-sync
        Supported: replaces
        Content-Length: 312

        v=0
        o=- 20205 20205 IN IP4 192.168.0.105
        s=SDP data
        c=IN IP4 192.168.0.105
        t=0 0
        m=audio 12328 RTP/AVP 9 8 18 106 101
        a=rtpmap:9 G722/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:18 G729/8000
        a=fmtp:18 annexb=no
        a=rtpmap:106 iLBC/8000
        a=ptime:20
        a=sendrecv
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15

12:33:44.715325 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 1298)
    192.168.0.105.5060 > 192.168.0.4.5060: SIP, length: 1270
        INVITE sip:400@192.168.0.4:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.105:5060;branch=z9hG4bK3093223425
        From: "\0xd0\0x90\0xd0\0xbb\0xd0\0xb5\0xd0\0xba\0xd1\0x81\0xd0\0xb0\0xd0\0xbd\0xd0\0xb4\0xd1\0x80 \0xd0\0x9d\0xd0\0xb0\0xd0\0xb9\0xd0\0xb4\0xd0\0xb0\0xd0\0xbd\0xd0\0xbe\0xd0\0xb2" <sip:527@192.168.0.4:5060>;tag=3126418466
        To: <sip:400@192.168.0.4:5060>
        Call-ID: 0_2715817587@192.168.0.105
        CSeq: 2 INVITE
        Contact: <sip:527@192.168.0.105:5060>
        Proxy-Authorization: Digest username="527", realm="192.168.0.4", nonce="1695904424:09a1f6e07e68fb508ca665cfe3cba2a7", uri="sip:400@192.168.0.4:5060", response="8aaeb386b99efd425a00a7ee87adf90f", 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 52.80.14.2
        Supported: 100rel
        Supported: timer
        Session-Expires: 300;refresher=uac
        Min-SE: 90
        Allow-Events: talk,hold,conference,refer,check-sync
        Supported: replaces
        Content-Length: 312

        v=0
        o=- 20205 20205 IN IP4 192.168.0.105
        s=SDP data
        c=IN IP4 192.168.0.105
        t=0 0
        m=audio 12328 RTP/AVP 9 8 18 106 101
        a=rtpmap:9 G722/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:18 G729/8000
        a=fmtp:18 annexb=no
        a=rtpmap:106 iLBC/8000
        a=ptime:20
        a=sendrecv
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15

12:33:45.334330 IP (tos 0x0, ttl 64, id 62366, offset 0, flags [DF], proto UDP (17), length 36)
    192.168.0.120.5670 > 192.168.0.4.5060: SIP, length: 8
        \0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00
12:33:45.338318 IP (tos 0x0, ttl 127, id 23286, offset 0, flags [none], proto UDP (17), length 30)
    10.8.0.20.53018 > 192.168.0.4.5060: SIP, length: 2


12:33:45.581081 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 303)
    192.168.0.4.5060 > 192.168.0.105.5060: SIP, length: 275
        SIP/2.0 100 Trying
        Via: SIP/2.0/UDP 192.168.0.105:5060;branch=z9hG4bK3093223425
        To: <sip:400@192.168.0.4:5060>
        From: "\0xd0\0x90\0xd0\0xbb\0xd0\0xb5\0xd0\0xba\0xd1\0x81\0xd0\0xb0\0xd0\0xbd\0xd0\0xb4\0xd1\0x80 \0xd0\0x9d\0xd0\0xb0\0xd0\0xb9\0xd0\0xb4\0xd0\0xb0\0xd0\0xbd\0xd0\0xbe\0xd0\0xb2" <sip:527@192.168.0.4:5060>;tag=3126418466
        Call-ID: 0_2715817587@192.168.0.105
        CSeq: 2 INVITE
        Content-Length: 0


12:33:45.769733 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 875)
    192.168.0.4.5060 > 192.168.0.105.5060: SIP, length: 847
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 192.168.0.105:5060;branch=z9hG4bK3093223425
        Record-Route: <sip:192.168.0.4:5060;transport=udp;lr>
        Require: timer
        Contact: <sip:400@127.0.0.1:6060>
        To: <sip:400@192.168.0.4:5060>;tag=1879224193
        From: "\0xd0\0x90\0xd0\0xbb\0xd0\0xb5\0xd0\0xba\0xd1\0x81\0xd0\0xb0\0xd0\0xbd\0xd0\0xb4\0xd1\0x80 \0xd0\0x9d\0xd0\0xb0\0xd0\0xb9\0xd0\0xb4\0xd0\0xb0\0xd0\0xbd\0xd0\0xbe\0xd0\0xb2" <sip:527@192.168.0.4:5060>;tag=3126418466
        Call-ID: 0_2715817587@192.168.0.105
        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/5.2.1
        Allow-Events: conference
        Content-Length: 187

        v=0
        o=gateway 0 0 IN IP4 192.168.0.4
        s=conversation
        c=IN IP4 192.168.0.4
        t=0 0
        m=audio 12010 RTP/AVP 9 101
        a=rtpmap:9 G722/8000
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15

12:33:45.795351 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 732)
    192.168.0.105.5060 > 192.168.0.4.5060: SIP, length: 704
        ACK sip:400@127.0.0.1:6060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.105:5060;branch=z9hG4bK1478929689
        Route: <sip:192.168.0.4:5060;transport=udp;lr>
        From: "\0xd0\0x90\0xd0\0xbb\0xd0\0xb5\0xd0\0xba\0xd1\0x81\0xd0\0xb0\0xd0\0xbd\0xd0\0xb4\0xd1\0x80 \0xd0\0x9d\0xd0\0xb0\0xd0\0xb9\0xd0\0xb4\0xd0\0xb0\0xd0\0xbd\0xd0\0xbe\0xd0\0xb2" <sip:527@192.168.0.4:5060>;tag=3126418466
        To: <sip:400@192.168.0.4:5060>;tag=1879224193
        Call-ID: 0_2715817587@192.168.0.105
        CSeq: 2 ACK
        Contact: <sip:527@192.168.0.105:5060>
        Proxy-Authorization: Digest username="527", realm="192.168.0.4", nonce="1695904424:09a1f6e07e68fb508ca665cfe3cba2a7", uri="sip:400@192.168.0.4:5060", response="8aaeb386b99efd425a00a7ee87adf90f", algorithm=MD5, cnonce="0a4f113b", qop=auth, nc=00000001
        Max-Forwards: 70
        User-Agent: Yealink SIP-T21P_E2 52.80.14.2
        Content-Length: 0


12:33:48.008415 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 32)
    192.168.0.98.5060 > 192.168.0.4.5060: SIP, length: 4



12:33:48.093419 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 32)
    192.168.0.148.5060 > 192.168.0.4.5060: SIP, length: 4



12:33:50.797459 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 469)
    192.168.0.4.5060 > 192.168.0.105.5060: SIP, length: 441
        BYE sip:527@192.168.0.105:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.4:5060;branch=z9hG4bK-524287-1---f95458532ca58d2a;rport
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK455553037
        Max-Forwards: 69
        To: "\0xd0\0x90\0xd0\0xbb\0xd0\0xb5\0xd0\0xba\0xd1\0x81\0xd0\0xb0\0xd0\0xbd\0xd0\0xb4\0xd1\0x80 \0xd0\0x9d\0xd0\0xb0\0xd0\0xb9\0xd0\0xb4\0xd0\0xb0\0xd0\0xbd\0xd0\0xbe\0xd0\0xb2" <sip:527@192.168.0.4:5060>;tag=3126418466
        From: <sip:400@192.168.0.4:5060>;tag=1879224193
        Call-ID: 0_2715817587@192.168.0.105
        CSeq: 2 BYE
        User-Agent: eXosip/5.2.1
        Content-Length: 0


12:33:50.803479 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 450)
    192.168.0.105.5060 > 192.168.0.4.5060: SIP, length: 422
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 192.168.0.4:5060;branch=z9hG4bK-524287-1---f95458532ca58d2a;rport=5060
        Via: SIP/2.0/UDP 127.0.0.1:6060;rport=6060;branch=z9hG4bK455553037
        From: <sip:400@192.168.0.4:5060>;tag=1879224193
        To: "\0xd0\0x90\0xd0\0xbb\0xd0\0xb5\0xd0\0xba\0xd1\0x81\0xd0\0xb0\0xd0\0xbd\0xd0\0xb4\0xd1\0x80 \0xd0\0x9d\0xd0\0xb0\0xd0\0xb9\0xd0\0xb4\0xd0\0xb0\0xd0\0xbd\0xd0\0xbe\0xd0\0xb2" <sip:527@192.168.0.4:5060>;tag=3126418466
        Call-ID: 0_2715817587@192.168.0.105
        CSeq: 2 BYE
        User-Agent: Yealink SIP-T21P_E2 52.80.14.2
        Content-Length: 0


12:33:53.247530 IP (tos 0x68, ttl 64, id 4275, offset 0, flags [DF], proto UDP (17), length 32)
    192.168.0.109.5060 > 192.168.0.4.5060: SIP, length: 4



12:33:56.133623 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 376)
    192.168.0.112.5060 > 192.168.0.4.5060: SIP, length: 348
        CANCEL sip:528@192.168.0.4:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        To: <sip:528@192.168.0.4:5060>
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 CANCEL
        Max-Forwards: 70
        User-Agent: Yealink SIP-T21P_E2 52.84.14.7
        Content-Length: 0


12:33:56.148965 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 324)
    192.168.0.4.5060 > 192.168.0.112.5060: SIP, length: 296
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        To: <sip:528@192.168.0.4:5060>;tag=97e5eb37
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 CANCEL
        Server: repro 1.12.0
        Content-Length: 0


12:33:56.149253 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 354)
    192.168.0.4.5060 > 192.168.0.71.5060: SIP, length: 326
        CANCEL sip:528@192.168.0.71:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.4:5060;branch=z9hG4bK-524287-1---08d4c04d9aaea016;rport
        Max-Forwards: 70
        To: <sip:528@192.168.0.4:5060>
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4"<sip:526@192.168.0.4:5060>;tag=631926531
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 CANCEL
        Content-Length: 0


12:33:56.164618 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 375)
    192.168.0.71.5060 > 192.168.0.4.5060: SIP, length: 347
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 192.168.0.4:5060;branch=z9hG4bK-524287-1---08d4c04d9aaea016;rport=5060
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        To: <sip:528@192.168.0.4:5060>;tag=2785734918
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 CANCEL
        User-Agent: Yealink SIP-T21P_E2 52.84.14.1
        Content-Length: 0


12:33:56.171611 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 452)
    192.168.0.71.5060 > 192.168.0.4.5060: SIP, length: 424
        SIP/2.0 487 Request Cancelled
        Via: SIP/2.0/UDP 192.168.0.4:5060;branch=z9hG4bK-524287-1---08d4c04d9aaea016;rport=5060
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        To: <sip:528@192.168.0.4:5060>;tag=2785734918
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 INVITE
        User-Agent: Yealink SIP-T21P_E2 52.84.14.1
        Content-Length: 0


12:33:56.181454 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 363)
    192.168.0.4.5060 > 192.168.0.71.5060: SIP, length: 335
        ACK sip:528@192.168.0.71:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.4:5060;branch=z9hG4bK-524287-1---08d4c04d9aaea016;rport
        Max-Forwards: 70
        To: <sip:528@192.168.0.4:5060>;tag=2785734918
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4"<sip:526@192.168.0.4:5060>;tag=631926531
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 ACK
        Content-Length: 0


12:33:56.187611 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 385)
    192.168.0.4.5060 > 192.168.0.112.5060: SIP, length: 357
        SIP/2.0 487 Request Cancelled
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        To: <sip:528@192.168.0.4:5060>;tag=2785734918
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 INVITE
        Server: repro 1.12.0
        User-Agent: Yealink SIP-T21P_E2 52.84.14.1
        Content-Length: 0


12:33:56.193608 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 323)
    192.168.0.112.5060 > 192.168.0.4.5060: SIP, length: 295
        ACK sip:528@192.168.0.4:5060 SIP/2.0
        Via: SIP/2.0/UDP 192.168.0.112:5060;branch=z9hG4bK2153457211
        From: "\0xd0\0x9d\0xd0\0xb8\0xd0\0xba\0xd0\0xb8\0xd1\0x84\0xd0\0xbe\0xd1\0x80\0xd0\0xbe\0xd0\0xb2 \0xd0\0x92\0xd0\0xbb\0xd0\0xb0\0xd0\0xb4" <sip:526@192.168.0.4:5060>;tag=631926531
        To: <sip:528@192.168.0.4:5060>;tag=2785734918
        Call-ID: 0_885322584@192.168.0.112
        CSeq: 2 ACK
        Content-Length: 0


12:33:56.364621 IP (tos 0x68, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 32)
    192.168.0.105.5060 > 192.168.0.4.5060: SIP, length: 4



12:33:58.348675 IP (tos 0x0, ttl 127, id 23287, offset 0, flags [none], proto UDP (17), length 30)
    10.8.0.20.53018 > 192.168.0.4.5060: SIP, length: 2



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