[SR-Users] Kamailio not updating CSeq after uac_auth() for ACK

Daniel-Constantin Mierla miconda at gmail.com
Fri Dec 18 09:29:10 CET 2020


Hello,

ok, thanks for testing and feedback.

Cheers,
Daniel

On 18.12.20 09:19, Terry Tailor wrote:
> Hi Daniel,
> I have tested CANCEL and ACK cases with nighty Release it is working
> fine. Thank you
>
> Regards
> Terry
>
> On Thu, Dec 17, 2020 at 6:59 PM Daniel-Constantin Mierla
> <miconda at gmail.com <mailto:miconda at gmail.com>> wrote:
>
>     Hello,
>
>     can you try with latest git branch 5.4? I just pushed a commit to
>     handle this case.
>
>     You have to compile from sources, like:
>
>       *
>     https://kamailio.org/docs/tutorials/5.4.x/kamailio-install-guide-git/
>     <https://kamailio.org/docs/tutorials/5.4.x/kamailio-install-guide-git/>
>
>     Debian packages from branch 5.4 are also built over night:
>
>       * http://deb.kamailio.org/#dev54 <http://deb.kamailio.org/#dev54>
>
>     Cheers,
>     Daniel
>
>     On 17.12.20 13:05, Terry Tailor wrote:
>>     Hi, I have updated Kamailio to 5.4 still there is an issue with
>>     Cseq of cancel in case of cancel it is not increasing cSeq
>>     here are details
>>     1. proxy a sends invite with CSeq: 102 INVITE and proxy b route
>>     it to asterisk with CSeq: 102 INVITE
>>     2. asterisk sends 401 Unauthorized with CSeq: 102 INVITE and
>>     proxy b sends ACK with CSeq: 102 ACK
>>     3. proxy b sends invite with CSeq: 103 INVITE and asterisk sends
>>     100 Trying and 180 Ringing with CSeq: 103 INVITE
>>     4. proxy b relay to proxy a 180 Ringing with CSeq: 102 INVITE
>>     5. proxy a send CANCEL with CSeq: 102 CANCEL and proxy b sends
>>     CANCEL with CSeq: 102 CANCEL to asterisk
>>     6. Now asterisk is sending 481 Call leg/transaction does not exist
>>
>>     uname -a: Linux example.com <http://example.com>
>>     4.15.0-124-generic #127-Ubuntu SMP Fri Nov 6 10:54:43 UTC 2020
>>     x86_64 GNU/Linux
>>     kamailio -v: version: kamailio 5.4.3 (x86_64/linux)
>>     flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS,
>>     DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC,
>>     Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX,
>>     FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER,
>>     USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES,
>>     TLS_PTHREAD_MUTEX_SHARED
>>     ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144,
>>     MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
>>     poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
>>     id: unknown
>>     compiled with gcc 6.3.0
>>
>>
>>     sip logs:
>>
>>
>>     2020/12/17 11:42:32.289934 proxy-a.com:5060
>>     <http://proxy-a.com:5060> -> 10.0.14.118:5060
>>     <http://10.0.14.118:5060>
>>     INVITE sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>
>>     SIP/2.0
>>     Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Via: SIP/2.0/UDP did.com:5060;received=did.com
>>     <http://did.com>;branch=z9hG4bK3756a567;rport=5060
>>     Max-Forwards: 70
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>>
>>     Contact: <sip:54321 at did.com:5060 <http://sip:54321@did.com:5060>>
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     User-Agent: VB-Proxy
>>     CSeq: 102 INVITE
>>     User-Agent: did
>>     Date: Thu, 17 Dec 2020 11:42:32 GMT
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     Remote-Party-ID: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;party=calling;privacy=off;screen=no
>>     Content-Type: application/sdp
>>     Content-Length: 889
>>
>>     2020/12/17 11:42:32.290569 10.0.14.118:5060
>>     <http://10.0.14.118:5060> -> proxy-a.com:5060
>>     <http://proxy-a.com:5060>
>>     SIP/2.0 100 trying -- your call is important to us
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1;rport=5060
>>     Via: SIP/2.0/UDP did.com:5060;received=did.com
>>     <http://did.com>;branch=z9hG4bK3756a567;rport=5060
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>>
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 INVITE
>>     Server: kamailio (5.4.3 (x86_64/linux))
>>     Content-Length: 0
>>
>>
>>
>>     2020/12/17 11:42:32.291036 10.0.14.118:5060
>>     <http://10.0.14.118:5060> -> 10.0.14.118:6000
>>     <http://10.0.14.118:6000>
>>     INVITE sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>
>>     SIP/2.0
>>     Record-Route: <sip:sip.comms.kuflink.com
>>     <http://sip.comms.kuflink.com>;lr;did=baf.7bf1>
>>     Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.0
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Via: SIP/2.0/UDP did.com:5060;received=did.com
>>     <http://did.com>;branch=z9hG4bK3756a567;rport=5060
>>     Max-Forwards: 70
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>>
>>     Contact: <sip:54321 at did.com:5060 <http://sip:54321@did.com:5060>>
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     User-Agent: VB-Proxy
>>     CSeq: 102 INVITE
>>     User-Agent: did
>>     Date: Thu, 17 Dec 2020 11:42:32 GMT
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     Remote-Party-ID: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;party=calling;privacy=off;screen=no
>>     Content-Type: application/sdp
>>     Content-Length: 889
>>
>>
>>
>>     2020/12/17 11:42:32.308279 10.0.14.118:6000
>>     <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>     <http://10.0.14.118:5060>
>>     SIP/2.0 401 Unauthorized
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.0;received=10.0.14.118;rport=5060
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Via: SIP/2.0/UDP did.com:5060;received=did.com
>>     <http://did.com>;branch=z9hG4bK3756a567;rport=5060
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=as152bd976
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 INVITE
>>     Server: did
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     WWW-Authenticate: Digest algorithm=MD5,
>>     realm="sip1.comms.kuflink.com <http://sip1.comms.kuflink.com>",
>>     nonce="3673a540"
>>     Content-Length: 0
>>
>>
>>     2020/12/17 11:42:32.308770 10.0.14.118:5060
>>     <http://10.0.14.118:5060> -> 10.0.14.118:6000
>>     <http://10.0.14.118:6000>
>>     ACK sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com> SIP/2.0
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.0
>>     Max-Forwards: 70
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=as152bd976
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 ACK
>>     Content-Length: 0
>>
>>
>>     2020/12/17 11:42:32.309610 10.0.14.118:5060
>>     <http://10.0.14.118:5060> -> 10.0.14.118:6000
>>     <http://10.0.14.118:6000>
>>     INVITE sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>
>>     SIP/2.0
>>     Record-Route: <sip:sip.comms.kuflink.com
>>     <http://sip.comms.kuflink.com>;lr;did=baf.7bf1>
>>     Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Via: SIP/2.0/UDP did.com:5060;received=did.com
>>     <http://did.com>;branch=z9hG4bK3756a567;rport=5060
>>     Max-Forwards: 70
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>>
>>     Contact: <sip:54321 at did.com:5060 <http://sip:54321@did.com:5060>>
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     User-Agent: VB-Proxy
>>     CSeq: 103 INVITE
>>     User-Agent: did
>>     Date: Thu, 17 Dec 2020 11:42:32 GMT
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     Remote-Party-ID: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;party=calling;privacy=off;screen=no
>>     Content-Type: application/sdp
>>     Content-Length: 889
>>     Authorization: Digest username="did095499",
>>     realm="sip1.comms.kuflink.com <http://sip1.comms.kuflink.com>",
>>     nonce="3673a540", uri="sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>",
>>     response="24d8949f18f4f2650913ce3feaa78380", algorithm=MD5
>>
>>
>>
>>
>>     2020/12/17 11:42:32.333610 10.0.14.118:6000
>>     <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>     <http://10.0.14.118:5060>
>>     SIP/2.0 100 Trying
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102;received=10.0.14.118;rport=5060
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Via: SIP/2.0/UDP did.com:5060;received=did.com
>>     <http://did.com>;branch=z9hG4bK3756a567;rport=5060
>>     Record-Route: <sip:sip.comms.kuflink.com
>>     <http://sip.comms.kuflink.com>;lr;did=baf.7bf1>
>>     Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>>
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 103 INVITE
>>     Server: did
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     Session-Expires: 1800;refresher=uas
>>     Contact: <sip:123456 at 10.0.14.118:6000
>>     <http://sip:123456@10.0.14.118:6000>>
>>     Content-Length: 0
>>
>>
>>
>>     2020/12/17 11:42:34.276380 10.0.14.118:6000
>>     <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>     <http://10.0.14.118:5060>
>>     SIP/2.0 180 Ringing
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102;received=10.0.14.118;rport=5060
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Via: SIP/2.0/UDP did.com:5060;received=did.com
>>     <http://did.com>;branch=z9hG4bK3756a567;rport=5060
>>     Record-Route: <sip:sip.comms.kuflink.com
>>     <http://sip.comms.kuflink.com>;lr;did=baf.7bf1>
>>     Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=as12b14194
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 103 INVITE
>>     Server: did
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     Session-Expires: 1800;refresher=uas
>>     Contact: <sip:123456 at 10.0.14.118:6000
>>     <http://sip:123456@10.0.14.118:6000>>
>>     Content-Length: 0
>>
>>
>>     2020/12/17 11:42:34.277337 10.0.14.118:5060
>>     <http://10.0.14.118:5060> -> proxy-a.com:5060
>>     <http://proxy-a.com:5060>
>>     SIP/2.0 180 Ringing
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Via: SIP/2.0/UDP did.com:5060;received=did.com
>>     <http://did.com>;branch=z9hG4bK3756a567;rport=5060
>>     Record-Route: <sip:sip.comms.kuflink.com
>>     <http://sip.comms.kuflink.com>;lr;did=baf.7bf1>
>>     Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=as12b14194
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 INVITE
>>     Server: did
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     Session-Expires: 1800;refresher=uas
>>     Contact: <sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1>
>>     Content-Length: 0
>>
>>
>>
>>     2020/12/17 11:42:38.113181 proxy-a.com:5060
>>     <http://proxy-a.com:5060> -> 10.0.14.118:5060
>>     <http://10.0.14.118:5060>
>>     CANCEL sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>
>>     SIP/2.0
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Max-Forwards: 70
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>>
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 CANCEL
>>     Content-Length: 0
>>
>>
>>     2020/12/17 11:42:38.113918 10.0.14.118:5060
>>     <http://10.0.14.118:5060> -> 10.0.14.118:6000
>>     <http://10.0.14.118:6000>
>>     CANCEL sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>
>>     SIP/2.0
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1
>>     Max-Forwards: 70
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>>
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 CANCEL
>>     Content-Length: 0
>>     P-K-CSeq-Auth: 103
>>
>>
>>
>>     2020/12/17 11:42:38.114114 10.0.14.118:5060
>>     <http://10.0.14.118:5060> -> proxy-a.com:5060
>>     <http://proxy-a.com:5060>
>>     SIP/2.0 200 canceling
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1;rport=5060
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=a74459175e9494c7e23ffeb306461015-0f770312
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 CANCEL
>>     Server: kamailio (5.4.3 (x86_64/linux))
>>     Content-Length: 0
>>
>>
>>
>>     2020/12/17 11:42:38.116456 10.0.14.118:6000
>>     <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>     <http://10.0.14.118:5060>
>>     SIP/2.0 481 Call leg/transaction does not exist
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1;received=10.0.14.118;rport=5060
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=as24deed39
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 CANCEL
>>     Server: did
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     Content-Length: 0
>>
>>
>>
>>     2020/12/17 11:42:54.554350 10.0.14.118:6000
>>     <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>     <http://10.0.14.118:5060>
>>     SIP/2.0 183 Session Progress
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102;received=10.0.14.118;rport=5060
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Via: SIP/2.0/UDP did.com:5060;received=did.com
>>     <http://did.com>;branch=z9hG4bK3756a567;rport=5060
>>     Record-Route: <sip:sip.comms.kuflink.com
>>     <http://sip.comms.kuflink.com>;lr;did=baf.7bf1>
>>     Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=as12b14194
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 103 INVITE
>>     Server: did
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     Session-Expires: 1800;refresher=uas
>>     Contact: <sip:123456 at 10.0.14.118:6000
>>     <http://sip:123456@10.0.14.118:6000>>
>>     Content-Type: application/sdp
>>     Require: timer
>>     Content-Length: 292
>>
>>
>>
>>     2020/12/17 11:42:54.554978 10.0.14.118:5060
>>     <http://10.0.14.118:5060> -> 10.0.14.118:6000
>>     <http://10.0.14.118:6000>
>>     CANCEL sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>
>>     SIP/2.0
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1
>>     Max-Forwards: 70
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com>>
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 CANCEL
>>     Content-Length: 0
>>     P-K-CSeq-Auth: 103
>>
>>
>>
>>     2020/12/17 11:42:54.557082 10.0.14.118:6000
>>     <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>     <http://10.0.14.118:5060>
>>     SIP/2.0 481 Call leg/transaction does not exist
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1;received=10.0.14.118;rport=5060
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=as5eee0295
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 CANCEL
>>     Server: did
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     Content-Length: 0
>>
>>
>>
>>     2020/12/17 11:42:59.617825 10.0.14.118:6000
>>     <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>     <http://10.0.14.118:5060>
>>     SIP/2.0 603 Declined
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102;received=10.0.14.118;rport=5060
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Via: SIP/2.0/UDP did.com:5060;received=did.com
>>     <http://did.com>;branch=z9hG4bK3756a567;rport=5060
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=as12b14194
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 103 INVITE
>>     Server: did
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     Session-Expires: 1800;refresher=uas
>>     Content-Length: 0
>>
>>
>>
>>     2020/12/17 11:42:59.618423 10.0.14.118:5060
>>     <http://10.0.14.118:5060> -> 10.0.14.118:6000
>>     <http://10.0.14.118:6000>
>>     ACK sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com> SIP/2.0
>>     Via: SIP/2.0/UDP
>>     sip.comms.kuflink.com:5060;branch=z9hG4bKb7e1.bbcb7aefd10825105e2fce86fd82efe6.1.cs102
>>     Max-Forwards: 70
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=as12b14194
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 103 ACK
>>     Content-Length: 0
>>
>>
>>
>>     2020/12/17 11:42:59.618944 10.0.14.118:5060
>>     <http://10.0.14.118:5060> -> proxy-a.com:5060
>>     <http://proxy-a.com:5060>
>>     SIP/2.0 603 Declined
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;rport=5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Via: SIP/2.0/UDP did.com:5060;received=did.com
>>     <http://did.com>;branch=z9hG4bK3756a567;rport=5060
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=as12b14194
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 INVITE
>>     Server: did
>>     Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
>>     NOTIFY, INFO, PUBLISH, MESSAGE
>>     Supported: replaces, timer
>>     Session-Expires: 1800;refresher=uas
>>     Content-Length: 0
>>
>>
>>
>>     2020/12/17 11:42:59.620074 proxy-a.com:5060
>>     <http://proxy-a.com:5060> -> 10.0.14.118:5060
>>     <http://10.0.14.118:5060>
>>     ACK sip:123456 at proxy-a.com <mailto:sip%3A123456 at proxy-a.com> SIP/2.0
>>     Via: SIP/2.0/UDP
>>     proxy-a.com:5060;branch=z9hG4bKb7e1.f58c5fbd664fa63cd69162afcb07f88a.1
>>     Max-Forwards: 70
>>     From: "54321" <sip:54321 at did.com
>>     <mailto:sip%3A54321 at did.com>>;tag=as02b3f892
>>     To: <sip:123456 at proxy-a.com
>>     <mailto:sip%3A123456 at proxy-a.com>>;tag=as12b14194
>>     Call-ID: 6a981008384dd72c23ee9e59690eb5eb at did.com
>>     <mailto:6a981008384dd72c23ee9e59690eb5eb at did.com>
>>     CSeq: 102 ACK
>>     Content-Length: 0
>>
>>     On Thu, Dec 17, 2020 at 4:52 PM George Diamantopoulos
>>     <georgediam at gmail.com <mailto:georgediam at gmail.com>> wrote:
>>
>>         Not sure if this is related, but I've also run into issues
>>         with track_cseq_updates:
>>         https://www.mail-archive.com/sr-users@lists.kamailio.org/msg12362.html
>>         <https://www.mail-archive.com/sr-users@lists.kamailio.org/msg12362.html>
>>
>>         More specifically, kamailio won't process the 100 Trying to
>>         an Cseq-bumped INVITE it generated
>>         itself with uac_auth() when track_cseq_updates is on.
>>
>>         This implementation appears to be a little too fragile for
>>         the time being....
>>
>>         BR,
>>         George
>>
>>         On Thu, 17 Dec 2020 at 12:29, Terry Tailor
>>         <terry at fullduplex.co.uk <mailto:terry at fullduplex.co.uk>> wrote:
>>
>>             Hi, Here is setup details
>>             Kamailio Proxy a <-----> Kamailio Proxy b  <-----> Asterisk
>>             Kamailio proxy b auth based on IP Kamailio Proxy a
>>             1. Kamailio proxy sends an Invite request to Kamailio
>>             proxy b with CSeq: 102 INVITE
>>             2. Kamailio proxy b check again IP auth and sends invite
>>             request to asterisk with CSeq: 102 INVITE
>>             4 asterisk response with 401 Unauthorized with  CSeq: 102
>>             5. Kamailio proxy b sends ACK request with CSeq: 102 ACK
>>             6. Kamailio proxy b sends INVITE request with CSeq: 103
>>             INVITE
>>             7. Asterisk sends 100 trying and 180 ringing with CSeq:
>>             103 INVITE
>>             8. Kamailio proxy b relay 180 ringing with  CSeq: 102 INVITE
>>             9. Asterisk send 200 Ok with CSeq: 103 INVITE and proxy b
>>             relay it to proxy a with CSeq: 102 INVITE
>>             10. Now Proxy a send an ACK with CSeq: 102 ACK and proxy
>>             b relay ACK to asterisk with CSeq: 102 ACK
>>
>>             Now asterisk is retransmitting 200 ok with CSeq: 103
>>             INVITE and proxy a is sending ACK with Cseq: 102 ACK
>>
>>             Same happing in case of 487 Request Terminated
>>
>>             Here is my config
>>
>>             modparam("dialog", "default_timeout", 10800) # 3h
>>             modparam("dialog", "dlg_match_mode", 1)
>>             modparam("dialog", "db_mode", 0)
>>             modparam("dialog", "send_bye", 1)
>>             modparam("dialog", "track_cseq_updates", 1)
>>             modparam("uac","auth_username_avp","$avp(auser)")
>>             modparam("uac","auth_password_avp","$avp(apass)")
>>             modparam("uac","auth_realm_avp","$avp(arealm)")
>>
>>             modparam("tm", "failure_reply_mode", 3)
>>             # default retransmission timeout: 3 sec
>>             modparam("tm", "fr_timer", 2000)
>>             modparam("tm", "retr_timer1", 250)
>>             modparam("tm", "retr_timer2", 500)
>>             # default invite retransmission timeout after 1xx: 60 sec
>>             modparam("tm", "fr_inv_timer", 60000)
>>             modparam("tm", "reparse_on_dns_failover", 0)
>>
>>
>>
>>             if (is_method("INVITE") && !has_totag()) {
>>                     dlg_setflag(FLD_RTPPROXY);
>>                     dlg_manage();
>>                 }
>>                 route(RELAY);
>>
>>
>>
>>
>>             route[RELAY] {
>>
>>                 # At this point all checks are passed
>>                 t_on_branch("MANAGE_BRANCH");
>>                 t_on_reply("MANAGE_REPLY");
>>                 t_on_failure("MANAGE_FAILURE");
>>                 if(is_method("INVITE") && isflagset(FLT_FROMDID)) {
>>                  #$fd = "sip.comms.kuflink.com
>>             <http://sip.comms.kuflink.com>";
>>                   t_on_failure("RELAY_AUTH");
>>                 }
>>
>>                 if (!t_relay()) {
>>                     send_reply("500", "Cannot relay to $du/$ru");
>>                 }
>>                 exit;
>>             }
>>
>>             failure_route[RELAY_AUTH] {
>>                 t_on_branch("MANAGE_BRANCH");
>>                 t_on_reply("MANAGE_REPLY");
>>                 if (t_is_canceled()) {
>>                     exit;
>>                 }
>>                 if(t_check_status("401|407")) {
>>                     #$fd = "sip.comms.kuflink.com
>>             <http://sip.comms.kuflink.com>";
>>                     $avp(auser) = "DID_UA_USERNAME";
>>                     $avp(apass) = "DID_UA_PASSWORD";
>>                     if (uac_auth()) {
>>                         t_relay();
>>                     }
>>                     exit;
>>                 }
>>             }
>>
>>
>>             route[WITHINDLG] {
>>                 if (!has_totag()) {
>>                     return;
>>                 }
>>
>>                 if (is_method("BYE")) {
>>                     rtpengine_delete();
>>                 }
>>
>>                 # sequential request withing a dialog should
>>                 # take the path determined by record-routing
>>                 if (loose_route()) {
>>                     route(DLGURI);
>>                     if (is_method("ACK")) {
>>                         # ACK is forwarded statelessly
>>                         route(NATMANAGE);
>>                     } else if (is_method("NOTIFY")) {
>>                         # Add Record-Route for in-dialog NOTIFY as
>>             per RFC 6665.
>>                         record_route();
>>                     }
>>                     route(RELAY);
>>                     exit;
>>                 }
>>
>>                 if (is_method("SUBSCRIBE") && uri == myself) {
>>                     # in-dialog subscribe requests
>>                     route(PRESENCE);
>>                     exit;
>>                 }
>>                 if (is_method("ACK") ) {
>>                     if (t_check_trans()) {
>>                         # no loose-route, but stateful ACK;
>>                         # must be an ACK after a 487
>>                         # or e.g. 404 from upstream server
>>                         route(RELAY);
>>                         exit;
>>                     } else {
>>                         # ACK without matching transaction ... ignore
>>             and discard
>>                         exit;
>>                     }
>>                 }
>>                 send_reply("404","Not here");
>>                 exit;
>>             }
>>
>>
>>             kamailio -v
>>             version: kamailio 5.3.7 (x86_64/linux)
>>             flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS,
>>             USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK,
>>             SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC,
>>             DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT,
>>             USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR,
>>             USE_DST_BLACKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
>>             ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144,
>>             MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
>>             poll method support: poll, epoll_lt, epoll_et, sigio_rt,
>>             select.
>>             id: unknown
>>             compiled with gcc 6.3.0
>>
>>
>>             uname -a
>>             Linux example.com <http://example.com> 4.15.0-124-generic
>>             #127-Ubuntu SMP Fri Nov 6 10:54:43 UTC 2020 x86_64 GNU/Linux
>>
>>
>>
>>             SIP logs
>>             2020/12/17 10:08:18.483907 proxy-a.com:5060
>>             <http://proxy-a.com:5060> -> 10.0.14.118:5060
>>             <http://10.0.14.118:5060>
>>             INVITE sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com> SIP/2.0
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Max-Forwards: 70
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>
>>             Contact: <sip:7654321 at did.com:5060
>>             <http://sip:7654321@did.com:5060>>
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             User-Agent: ProxyA
>>             CSeq: 102 INVITE
>>             User-Agent: proxy
>>             Date: Thu, 17 Dec 2020 10:08:18 GMT
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Remote-Party-ID: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;party=calling;privacy=off;screen=no
>>             Content-Type: application/sdp
>>             Content-Length: 885
>>
>>
>>
>>             2020/12/17 10:08:18.485063 10.0.14.118:5060
>>             <http://10.0.14.118:5060> -> proxy-a.com:5060
>>             <http://proxy-a.com:5060>
>>             SIP/2.0 100 trying -- your call is important to us
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1;rport=5060
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 102 INVITE
>>             Server: kamailio (5.3.7 (x86_64/linux))
>>             Content-Length: 0
>>
>>
>>             2020/12/17 10:08:18.485576 10.0.14.118:5060
>>             <http://10.0.14.118:5060> -> 10.0.14.118:6000
>>             <http://10.0.14.118:6000>
>>             INVITE sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com> SIP/2.0
>>             Record-Route: <sip:proxy-b.com
>>             <http://proxy-b.com>;lr;did=d18.7a9>
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             Via: SIP/2.0/UDP
>>             proxy-b.com:5060;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.0
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Max-Forwards: 70
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>
>>             Contact: <sip:7654321 at did.com:5060
>>             <http://sip:7654321@did.com:5060>>
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             User-Agent: ProxyA
>>             CSeq: 102 INVITE
>>             User-Agent: proxy
>>             Date: Thu, 17 Dec 2020 10:08:18 GMT
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Remote-Party-ID: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;party=calling;privacy=off;screen=no
>>             Content-Type: application/sdp
>>             Content-Length: 885
>>
>>
>>
>>             2020/12/17 10:08:18.622867 10.0.14.118:6000
>>             <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>             <http://10.0.14.118:5060>
>>             SIP/2.0 401 Unauthorized
>>             Via: SIP/2.0/UDP
>>             proxy-b.com:5060;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.0;received=10.0.14.118;rport=5060
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as4107645c
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 102 INVITE
>>             Server: proxy
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             WWW-Authenticate: Digest algorithm=MD5,
>>             realm="sip1.comms.kuflink.com
>>             <http://sip1.comms.kuflink.com>", nonce="11139d33"
>>             Content-Length: 0
>>
>>
>>
>>             2020/12/17 10:08:18.624034 10.0.14.118:5060
>>             <http://10.0.14.118:5060> -> 10.0.14.118:6000
>>             <http://10.0.14.118:6000>
>>             ACK sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com> SIP/2.0
>>             Via: SIP/2.0/UDP
>>             proxy-b.com:5060;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.0
>>             Max-Forwards: 70
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as4107645c
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 102 ACK
>>             Content-Length: 0
>>
>>
>>
>>             2020/12/17 10:08:18.625557 10.0.14.118:5060
>>             <http://10.0.14.118:5060> -> 10.0.14.118:6000
>>             <http://10.0.14.118:6000>
>>             INVITE sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com> SIP/2.0
>>             Record-Route: <sip:proxy-b.com
>>             <http://proxy-b.com>;lr;did=d18.7a9>
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             Via: SIP/2.0/UDP
>>             proxy-b.com:5060;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Max-Forwards: 70
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>
>>             Contact: <sip:7654321 at did.com:5060
>>             <http://sip:7654321@did.com:5060>>
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             User-Agent: ProxyA
>>             CSeq: 103 INVITE
>>             User-Agent: proxy
>>             Date: Thu, 17 Dec 2020 10:08:18 GMT
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Remote-Party-ID: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;party=calling;privacy=off;screen=no
>>             Content-Type: application/sdp
>>             Content-Length: 885
>>             Authorization: Digest username="xxxxx", realm="xxxx",
>>             nonce="11139d33", uri="sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>", response="qwewqeqwe",
>>             algorithm=MD5
>>
>>
>>
>>             2020/12/17 10:08:18.779483 10.0.14.118:6000
>>             <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>             <http://10.0.14.118:5060>
>>             SIP/2.0 100 Trying
>>             Via: SIP/2.0/UDP
>>             proxy-b.com:5060;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102;received=10.0.14.118;rport=5060
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Record-Route: <sip:proxy-b.com
>>             <http://proxy-b.com>;lr;did=d18.7a9>
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 103 INVITE
>>             Server: proxy
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Session-Expires: 1800;refresher=uas
>>             Contact: <sip:123456 at 10.0.14.118:6000
>>             <http://sip:123456@10.0.14.118:6000>>
>>             Content-Length: 0
>>
>>
>>
>>
>>             2020/12/17 10:08:20.937756 10.0.14.118:6000
>>             <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>             <http://10.0.14.118:5060>
>>             SIP/2.0 180 Ringing
>>             Via: SIP/2.0/UDP
>>             proxy-b.com:5060;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102;received=10.0.14.118;rport=5060
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Record-Route: <sip:proxy-b.com
>>             <http://proxy-b.com>;lr;did=d18.7a9>
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 103 INVITE
>>             Server: proxy
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Session-Expires: 1800;refresher=uas
>>             Contact: <sip:123456 at 10.0.14.118:6000
>>             <http://sip:123456@10.0.14.118:6000>>
>>             Content-Length: 0
>>
>>
>>
>>             2020/12/17 10:08:20.938593 10.0.14.118:5060
>>             <http://10.0.14.118:5060> -> proxy-a.com:5060
>>             <http://proxy-a.com:5060>
>>             SIP/2.0 180 Ringing
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Record-Route: <sip:proxy-b.com
>>             <http://proxy-b.com>;lr;did=d18.7a9>
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 102 INVITE
>>             Server: proxy
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Session-Expires: 1800;refresher=uas
>>             Contact:
>>             <sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1>
>>             Content-Length: 0
>>
>>
>>
>>             2020/12/17 10:08:22.075814 10.0.14.118:6000
>>             <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>             <http://10.0.14.118:5060>
>>             SIP/2.0 200 OK
>>             Via: SIP/2.0/UDP
>>             proxy-b.com:5060;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102;received=10.0.14.118;rport=5060
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Record-Route: <sip:proxy-b.com
>>             <http://proxy-b.com>;lr;did=d18.7a9>
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 103 INVITE
>>             Server: proxy
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Session-Expires: 1800;refresher=uas
>>             Contact: <sip:123456 at 10.0.14.118:6000
>>             <http://sip:123456@10.0.14.118:6000>>
>>             Content-Type: application/sdp
>>             Require: timer
>>             Content-Length: 296
>>
>>
>>             2020/12/17 10:08:22.077049 10.0.14.118:5060
>>             <http://10.0.14.118:5060> -> proxy-a.com:5060
>>             <http://proxy-a.com:5060>
>>             SIP/2.0 200 OK
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Record-Route: <sip:proxy-b.com
>>             <http://proxy-b.com>;lr;did=d18.7a9>
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 102 INVITE
>>             Server: proxy
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Session-Expires: 1800;refresher=uas
>>             Contact:
>>             <sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1>
>>             Content-Type: application/sdp
>>             Require: timer
>>             Content-Length: 316
>>
>>
>>
>>             2020/12/17 10:08:22.103365 proxy-a.com:5060
>>             <http://proxy-a.com:5060> -> 10.0.14.118:5060
>>             <http://10.0.14.118:5060>
>>             ACK
>>             sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1;alias=109.72.216.251~5060~1
>>             SIP/2.0
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;branch=z9hG4bKbe6d.0fc1940efc770391762d7d67094c24f8.0
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK2a5fae72;rport=5060
>>             Route: <sip:proxy-b.com <http://proxy-b.com>;lr;did=d18.7a9>
>>             Max-Forwards: 70
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Contact: <sip:7654321 at did.com:5060
>>             <http://sip:7654321@did.com:5060>>
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 102 ACK
>>             User-Agent: proxy
>>             Content-Length: 0
>>
>>
>>
>>             2020/12/17 10:08:22.103877 10.0.14.118:5060
>>             <http://10.0.14.118:5060> -> 10.0.14.118:6000
>>             <http://10.0.14.118:6000>
>>             ACK
>>             sip:123456 at 10.0.14.118:6000;alias=109.72.216.251~5060~1
>>             SIP/2.0
>>             Via: SIP/2.0/UDP
>>             proxy-b.com:5060;branch=z9hG4bKbe6d.79f351d031912aae585207d2f26d5650.0
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.0fc1940efc770391762d7d67094c24f8.0
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK2a5fae72;rport=5060
>>             Max-Forwards: 70
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Contact: <sip:7654321 at did.com:5060
>>             <http://sip:7654321@did.com:5060>>
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 102 ACK
>>             User-Agent: proxy
>>             Content-Length: 0
>>             P-K-CSeq-Refresh: 103
>>
>>
>>             2020/12/17 10:08:22.575533 10.0.14.118:6000
>>             <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>             <http://10.0.14.118:5060>
>>             SIP/2.0 200 OK
>>             Via: SIP/2.0/UDP
>>             proxy-b.com:5060;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102;received=10.0.14.118;rport=5060
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Record-Route: <sip:proxy-b.com
>>             <http://proxy-b.com>;lr;did=d18.7a9>
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 103 INVITE
>>             Server: proxy
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Session-Expires: 1800;refresher=uas
>>             Contact: <sip:123456 at 10.0.14.118:6000
>>             <http://sip:123456@10.0.14.118:6000>>
>>             Content-Type: application/sdp
>>             Require: timer
>>             Content-Length: 296
>>
>>
>>
>>             2020/12/17 10:08:22.576777 10.0.14.118:5060
>>             <http://10.0.14.118:5060> -> proxy-a.com:5060
>>             <http://proxy-a.com:5060>
>>             SIP/2.0 200 OK
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Record-Route: <sip:proxy-b.com
>>             <http://proxy-b.com>;lr;did=d18.7a9>
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 102 INVITE
>>             Server: proxy
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Session-Expires: 1800;refresher=uas
>>             Contact:
>>             <sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1>
>>             Content-Type: application/sdp
>>             Require: timer
>>             Content-Length: 316
>>
>>
>>
>>             2020/12/17 10:08:22.581649 proxy-a.com:5060
>>             <http://proxy-a.com:5060> -> 10.0.14.118:5060
>>             <http://10.0.14.118:5060>
>>             ACK
>>             sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1;alias=109.72.216.251~5060~1
>>             SIP/2.0
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;branch=z9hG4bKbe6d.b9c7eeccd4cd7b44f05b173308dbaf0a.0
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK219933f6;rport=5060
>>             Route: <sip:proxy-b.com <http://proxy-b.com>;lr;did=d18.7a9>
>>             Max-Forwards: 70
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Contact: <sip:7654321 at did.com:5060
>>             <http://sip:7654321@did.com:5060>>
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 102 ACK
>>             User-Agent: proxy
>>             Content-Length: 0
>>
>>
>>
>>             2020/12/17 10:08:22.582313 10.0.14.118:5060
>>             <http://10.0.14.118:5060> -> 10.0.14.118:6000
>>             <http://10.0.14.118:6000>
>>             ACK
>>             sip:123456 at 10.0.14.118:6000;alias=109.72.216.251~5060~1
>>             SIP/2.0
>>             Via: SIP/2.0/UDP
>>             proxy-b.com:5060;branch=z9hG4bKbe6d.33626b5695ad4648ba393bc62bed6a8c.0
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.b9c7eeccd4cd7b44f05b173308dbaf0a.0
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK219933f6;rport=5060
>>             Max-Forwards: 70
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Contact: <sip:7654321 at did.com:5060
>>             <http://sip:7654321@did.com:5060>>
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 102 ACK
>>             User-Agent: proxy
>>             Content-Length: 0
>>             P-K-CSeq-Refresh: 103
>>
>>
>>             2020/12/17 10:08:23.575828 10.0.14.118:6000
>>             <http://10.0.14.118:6000> -> 10.0.14.118:5060
>>             <http://10.0.14.118:5060>
>>             SIP/2.0 200 OK
>>             Via: SIP/2.0/UDP
>>             proxy-b.com:5060;branch=z9hG4bKbe6d.619fd995c3fc8764ce5cd9c7be7efeef.1.cs102;received=10.0.14.118;rport=5060
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Record-Route: <sip:proxy-b.com
>>             <http://proxy-b.com>;lr;did=d18.7a9>
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 103 INVITE
>>             Server: proxy
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Session-Expires: 1800;refresher=uas
>>             Contact: <sip:123456 at 10.0.14.118:6000
>>             <http://sip:123456@10.0.14.118:6000>>
>>             Content-Type: application/sdp
>>             Require: timer
>>             Content-Length: 296
>>
>>
>>             2020/12/17 10:08:23.577863 10.0.14.118:5060
>>             <http://10.0.14.118:5060> -> proxy-a.com:5060
>>             <http://proxy-a.com:5060>
>>             SIP/2.0 200 OK
>>             Via: SIP/2.0/UDP
>>             proxy-a.com:5060;rport=5060;branch=z9hG4bKbe6d.10c4c5f001c66b8976214d4aef9f635c.1
>>             Via: SIP/2.0/UDP did.com:5060;received=did.com
>>             <http://did.com>;branch=z9hG4bK45f94ed9;rport=5060
>>             Record-Route: <sip:proxy-b.com
>>             <http://proxy-b.com>;lr;did=d18.7a9>
>>             Record-Route: <sip:proxy-a.com <http://proxy-a.com>;lr>
>>             From: "7654321" <sip:7654321 at did.com
>>             <mailto:sip%3A7654321 at did.com>>;tag=as55c522e1
>>             To: <sip:123456 at proxy-a.com
>>             <mailto:sip%3A123456 at proxy-a.com>>;tag=as147bfa3e
>>             Call-ID: 67675c7e636d6e773860255316e54779 at did.com
>>             <mailto:67675c7e636d6e773860255316e54779 at did.com>
>>             CSeq: 102 INVITE
>>             Server: proxy
>>             Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER,
>>             SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
>>             Supported: replaces, timer
>>             Session-Expires: 1800;refresher=uas
>>             Contact:
>>             <sip:123456 at 10.0.14.118:6000;alias=10.0.14.118~6000~1>
>>             Content-Type: application/sdp
>>             Require: timer
>>             Content-Length: 316
>>
>>
>>
>>             _______________________________________________
>>             Kamailio (SER) - Users Mailing List
>>             sr-users at lists.kamailio.org
>>             <mailto:sr-users at lists.kamailio.org>
>>             https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>             <https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users>
>>
>>         _______________________________________________
>>         Kamailio (SER) - Users Mailing List
>>         sr-users at lists.kamailio.org <mailto:sr-users at lists.kamailio.org>
>>         https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>         <https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users>
>>
>>
>>     _______________________________________________
>>     Kamailio (SER) - Users Mailing List
>>     sr-users at lists.kamailio.org <mailto:sr-users at lists.kamailio.org>
>>     https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users <https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users>
>
>     -- 
>     Daniel-Constantin Mierla -- www.asipto.com <http://www.asipto.com>
>     www.twitter.com/miconda <http://www.twitter.com/miconda> -- www.linkedin.com/in/miconda <http://www.linkedin.com/in/miconda>
>     Funding: https://www.paypal.me/dcmierla <https://www.paypal.me/dcmierla>
>
-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Funding: https://www.paypal.me/dcmierla

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