[SR-Users] PRACK with UDP to TCP translation send over wrong protocol
Angelo Sipper
sippro97 at gmail.com
Tue Sep 21 16:55:04 CEST 2021
Hi Daniel,
Thank you for your prompt response!
I sent the wrong trace with the added transport=tcp test. Yes we tried to
add the transport=tcp on config to overcome this issue but it was not
resolved. I will contact the provider to ask them to add the transport on
their 183 and I believe it will resolve the issue.
In case they cannot do this is there an alternative to bypass this? As per
now we have the save issue also on our ACK and BYE replies we send to the
provider which is logical.
Kind regards,
Angelo
Στις Τρί, 21 Σεπ 2021 στις 5:03 μ.μ., ο/η Daniel-Constantin Mierla <
miconda at gmail.com> έγραψε:
> Hello,
>
> the contact of the 183 has no transport parameter, which means it is the
> default one, respectively UDP. If the Provider wants traffic over TCP, the
> contact has to be with that transport parameter.
>
> I see that incoming PRACK has R-URI without transport parameter, but the
> one to be forwarded has a malformed version where transport=tcp is
> misplaced, probably due to a wrong config operation. If you do it in
> kamailio.cfg, you have to append ";transport=tcp" to $ru (whole r-uri), not
> to $rU (only user part of r-uri).
>
> Cheers,
> Daniel
> On 21.09.21 15:29, Angelo Sipper wrote:
>
> Correction
> UAC (OverTLS) ->(TLS)Kamailio1(UDP)-> (UDP)Kamailio2(TCP)-> (TCP)Provider
>
> Στις Τρί, 21 Σεπ 2021 στις 4:28 μ.μ., ο/η Angelo Sipper <
> sippro97 at gmail.com> έγραψε:
>
>> Hello,
>>
>> We have the following setup and I am having trouble passing the PRACK
>> with correct protocol to the provider.
>>
>> UAC (OverTLS) ->(UDP)Kamailio1 (UDP)-> (UDP)Kamailio2 (TCP)->
>> (TCP)Provider
>>
>> UAC : 10.2.1.160 NATED to 100.100.100.61 <http://50.50.50.50:5065/> (TLS)
>> Kamailio1 Sockets: 50.50.50.210:5061 <http://170.170.170.210:5061/>
>> (TLS),50.50.50.210:5060 <http://170.170.170.210:5060/> (UDP)
>> Kamailio2 Sockets: 50.50.50.182:5060 <http://170.170.170.170:5060/> (UDP)
>> 50.50.50.182:5080 <http://170.170.170.170:5060/> (TCP)
>> Provider: 200.200.200.209:5060 <http://200.200.200.193:5060/> (TCP)
>>
>> We use dispatcher on Kamailio1 & Kamailio2
>> The invite goes fine from UCA up to the provider and the provider
>> responses arrive to UAC fine.
>> The PRACK from UAC to kamailio1 goes fine to Kamaili02 but, Kamailio2
>> uses the UDP socket to send to the provider so the PRACK does not arrive to
>> the provider and the call is canceled.
>> If the provider is on UDP everything works fine.
>>
>> Below I have the trace. What should I look for in the config to resolve
>> this wrong protocol/socket on the PRACK?
>>
>> Kamailio2 Details:
>>
>> Sockets
>> ======
>> listen=udp:50.50.50.182:5060
>> listen=tcp: 50.50.50.182:5080
>>
>> On the rr module I have
>> ==================
>> modparam("rr", "enable_double_rr", 1)
>> modparam("rr", "append_fromtag", 1)
>> modparam("rr", "enable_full_lr", 1)
>>
>> CONFIG REQINIT & WITHINDLG PARTS
>> ================================
>> route[REQINIT] {
>>
>> set_reply_no_connect();
>> force_rport();
>>
>> if (!mf_process_maxfwd_header("10")) {
>> xlog("L_ERROR","Too Many Hops Rejecting!");
>> sl_send_reply("483","Too Many Hops");
>> exit;
>> }
>>
>> if(is_method("OPTIONS") && uri==myself && $rU==$null) {
>> sl_send_reply("200","Keepalive");
>> exit;
>> }
>>
>> if(!sanity_check("1511", "7")) {
>> xlog("Malformed SIP message from $si:$sp sanity 1511\n");
>> exit;
>> }
>>
>> if(!sanity_check("17895", "7")) {
>> xlog("Malformed SIP request from $si:$sp sanity 17895\n");
>> exit;
>> }
>> }
>>
>> route[WITHINDLG] {
>> if (!has_totag()) return;
>>
>> if (loose_route()) {
>>
>> if (is_method("BYE")) {
>> rtpengine_query();
>> rtpengine_delete();
>> }
>> route(RELAY_OUT);
>> }
>>
>> if ( is_method("ACK") ) {
>> #if (t_lookup_request()) {
>> if (t_check_trans()) {
>> route(RELAY_OUT);
>> exit;
>> } else {
>> # ACK without matching transaction ... ignore and discard
>> exit;
>> }
>> }
>>
>> sl_send_reply("404","Not Allowed");
>> exit;
>> }
>>
>> TRACE
>> ======
>> 50.50.50.210:5060 50.50.50.182:5060
>> 50.50.50.182:32818 200.200.200.209:5060
>> qqqqqqqqqqwqqqqqqq qqqqqqqqqqwqqqqqqq
>> qqqqqqqqqqwqqqqqqqq qqqqqqqqqqqwqqqqqqqqq
>> a 15:31:11.787490 x INVITE (SDP) x
>> x x
>> a +0.003099 x qqqqqqqqqqqqqqqqqqqqqqqqqq> x
>> x x
>> a 15:31:11.790589 x 100 trying -- your call is x
>> x x
>> a +0.002220 x <qqqqqqqqqqqqqqqqqqqqqqqqqq x
>> x x
>> a 15:31:11.792809 x x
>> x INVITE (SDP) x
>> a +0.020725 x x
>> x qqqqqqqqqqqqqqqqqqqqqqqqqq> x
>> a 15:31:11.813534 x x
>> x 100 Trying x
>> a +2.628884 x x
>> x <qqqqqqqqqqqqqqqqqqqqqqqqqq x
>> a 15:31:14.442418 x x
>> x 183 Session Progress (SDP) x
>> a +0.001572 x x
>> x <qqqqqqqqqqqqqqqqqqqqqqqqqq x
>> a 15:31:14.443990 x 183 Session Progress (SDP) x
>> x x
>> a +0.299221 x <qqqqqqqqqqqqqqqqqqqqqqqqqq x
>> x x
>> a 15:31:14.743211 x PRACK x
>> x x
>> a +0.043114 x qqqqqqqqqqqqqqqqqqqqqqqqqq> x
>> x x
>> a 15:31:14.786325 x x
>> PRACK x
>> a +0.448104 x x
>> qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq> x
>> a 15:31:15.234429 x PRACK x
>> x x
>> a +0.045697 x qqqqqqqqqqqqqqqqqqqqqqqq>>> x
>> x x
>> a 15:31:15.280126 x x
>> PRACK x
>> a +0.954153 x x
>> qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq>>> x
>> a 15:31:16.234279 x PRACK x
>> x x
>> a +0.045832 x qqqqqqqqqqqqqqqqqqqqqqqq>>> x
>> x x
>> a 15:31:16.280111 x x
>> PRACK x
>> a +1.954170 x x
>> qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq>>> x
>> a 15:31:18.234281 x PRACK x
>> x x
>> a +0.045839 x qqqqqqqqqqqqqqqqqqqqqqqq>>> x
>> x x
>> a 15:31:18.280120 x x
>> PRACK x
>> a +1.829676 x x
>> qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq>>> x
>> a 15:31:20.109796 x x
>> x 183 Session Progress (SDP) x
>> a +0.001460 x x
>> x <<<qqqqqqqqqqqqqqqqqqqqqqqq x
>> a 15:31:20.111256 x 183 Session Progress (SDP) x
>> x x
>> a +2.123075 x <<<qqqqqqqqqqqqqqqqqqqqqqqq x
>> x x
>> a 15:31:22.234331 x PRACK x
>> x x
>> a +0.045825 x qqqqqqqqqqqqqqqqqqqqqqqq>>> x
>> x x
>> a 15:31:22.280156 x x
>> PRACK x
>> a +2.239640 x x
>> qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq>>> x
>> a 15:31:24.519796 x x
>> x 486 Busy Here x
>> a +0.000555 x x
>> x <qqqqqqqqqqqqqqqqqqqqqqqqqq x
>> a 15:31:24.520351 x x
>> x ACK x
>> a +0.008965 x x
>> x qqqqqqqqqqqqqqqqqqqqqqqqqq> x
>> a 15:31:24.529316 x 486 Busy Here x
>> x x
>> a +0.000835 x <qqqqqqqqqqqqqqqqqqqqqqqqqq x
>> x x
>> a 15:31:24.530151 x ACK x
>> x x
>> a +1.704184 x qqqqqqqqqqqqqqqqqqqqqqqqqq> x
>> x x
>> a 15:31:26.234335 x PRACK x
>> x x
>> a +0.045856 x qqqqqqqqqqqqqqqqqqqqqqqqqq> x
>> x x
>> a 15:31:26.280191 x x
>> PRACK x
>> a +3.954734 x x
>> qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq>>> x
>> a 15:31:30.234925 x PRACK x
>> x x
>> x +0.045279 x qqqqqqqqqqqqqqqqqqqqqqqq>>> x
>> x x
>> x 15:31:30.280204 x x
>> PRACK x
>> x +3.954116 x x
>> qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq>>> x
>> x 15:31:34.234320 x PRACK x
>> x x
>>
>>
>> 2021/09/21 15:31:11.787490 50.50.50.210:5060 -> 50.50.50.182:5060
>> INVITE sip:123456789 at sip.mydomain.com:5060 SIP/2.0
>> Record-Route:
>> <sip:50.50.50.210;r2=on;lr;ftag=73622588a6084d8ba1bca54781e5094d;vsf=AAAAAFpUAgECBwAABnEBB3ZdWEIAQkVFS0BHX2ljZS5ldQ--;vst=AAAAAAAAAAAKCQ8ABAkHCAYKAgdxQFpGbkJCRktDREFYU1AAV0Qw;did=e8e.bb7;nat=yes>
>> Record-Route:
>> <sip:50.50.50.210:5061;transport=tls;r2=on;lr;ftag=73622588a6084d8ba1bca54781e5094d;vsf=AAAAAFpUAgECBwAABnEBB3ZdWEIAQkVFS0BHX2ljZS5ldQ--;vst=AAAAAAAAAAAKCQ8ABAkHCAYKAgdxQFpGbkJCRktDREFYU1AAV0Qw;did=e8e.bb7;nat=yes>
>> Via: SIP/2.0/UDP
>> 50.50.50.210;branch=z9hG4bK37fe.f05cee0feff15d488a12d3758cece7ae.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj472f07568b924214ada83ddfb0fb12b6;alias
>> Max-Forwards: 69
>> From: 987654321 <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>
>> Contact: "MyUserNAme"
>> <sip:mycustomerid at 10.2.1.160:58568;transport=TLS;ob;alias=100.100.100.61~48572~3>
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14320 INVITE
>> Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY,
>> REFER, MESSAGE, OPTIONS
>> Supported: replaces, 100rel, timer, norefersub
>> Session-Expires: 1800
>> Min-SE: 90
>> User-Agent: MicroSIP/3.20.5
>> Content-Type: application/sdp
>> Content-Length: 326
>> P-Asserted-Identity: <sip:987654321 at sip.mydomain.com>
>>
>> v=0
>> o=- 3841227071 3841227071 IN IP4 50.50.50.215
>> s=pjmedia
>> b=AS:84
>> t=0 0
>> a=X-nat:0
>> m=audio 36448 RTP/AVP 8 0 101
>> c=IN IP4 50.50.50.215
>> b=TIAS:64000
>> a=ssrc:2024148033 cname:4f2468fd611910fa
>> a=rtpmap:8 PCMA/8000
>> a=rtpmap:0 PCMU/8000
>> a=rtpmap:101 telephone-event/8000
>> a=fmtp:101 0-16
>> a=sendrecv
>> a=rtcp:36449
>>
>>
>> 2021/09/21 15:31:11.790589 50.50.50.182:5060 -> 50.50.50.210:5060
>> SIP/2.0 100 trying -- your call is important to us
>> Via: SIP/2.0/UDP
>> 50.50.50.210;branch=z9hG4bK37fe.f05cee0feff15d488a12d3758cece7ae.0;i=baa3;rport=5060
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj472f07568b924214ada83ddfb0fb12b6;alias
>> From: 987654321 <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14320 INVITE
>> Server: myserver
>> Content-Length: 0
>>
>>
>> 2021/09/21 15:31:11.792809 50.50.50.182:32818 -> 200.200.200.209:5060
>> INVITE sip:123456789 at sip.mydomain.com:5060 SIP/2.0
>> Record-Route:
>> <sip:50.50.50.182:5080;transport=tcp;r2=on;lr=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> Record-Route:
>> <sip:50.50.50.182;r2=on;lr=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> Record-Route:
>> <sip:50.50.50.210;r2=on;lr;ftag=73622588a6084d8ba1bca54781e5094d;vsf=AAAAAFpUAgECBwAABnEBB3ZdWEIAQkVFS0BHX2ljZS5ldQ--;vst=AAAAAAAAAAAKCQ8ABAkHCAYKAgdxQFpGbkJCRktDREFYU1AAV0Qw;did=e8e.bb7;nat=yes>
>> Record-Route:
>> <sip:50.50.50.210:5061;transport=tls;r2=on;lr;ftag=73622588a6084d8ba1bca54781e5094d;vsf=AAAAAFpUAgECBwAABnEBB3ZdWEIAQkVFS0BHX2ljZS5ldQ--;vst=AAAAAAAAAAAKCQ8ABAkHCAYKAgdxQFpGbkJCRktDREFYU1AAV0Qw;did=e8e.bb7;nat=yes>
>> Via: SIP/2.0/TCP 50.50.50.182:5080
>> ;branch=z9hG4bK37fe.254ecab744d678154779037580c59731.0
>> Via: SIP/2.0/UDP
>> 50.50.50.210;rport=5060;branch=z9hG4bK37fe.f05cee0feff15d488a12d3758cece7ae.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj472f07568b924214ada83ddfb0fb12b6;alias
>> Max-Forwards: 68
>> From: 987654321 <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>
>> Contact: "MyUserNAme"
>> <sip:mycustomerid at 10.2.1.160:58568;transport=TLS;ob;alias=100.100.100.61~48572~3>
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14320 INVITE
>> Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY,
>> REFER, MESSAGE, OPTIONS
>> Supported: replaces, 100rel, timer, norefersub
>> Session-Expires: 1800
>> Min-SE: 90
>> Content-Type: application/sdp
>> Content-Length: 326
>> P-Asserted-Identity: <sip:987654321 at sip.mydomain.com>
>>
>> v=0
>> o=- 3841227071 3841227071 IN IP4 50.50.50.183
>> s=pjmedia
>> b=AS:84
>> t=0 0
>> a=X-nat:0
>> m=audio 29308 RTP/AVP 8 0 101
>> c=IN IP4 50.50.50.183
>> b=TIAS:64000
>> a=ssrc:2024148033 cname:4f2468fd611910fa
>> a=rtpmap:8 PCMA/8000
>> a=rtpmap:0 PCMU/8000
>> a=rtpmap:101 telephone-event/8000
>> a=fmtp:101 0-16
>> a=sendrecv
>> a=rtcp:29309
>>
>>
>> 2021/09/21 15:31:11.813534 200.200.200.209:5060 -> 50.50.50.182:32818
>> SIP/2.0 100 Trying
>> Via: SIP/2.0/TCP 50.50.50.182:5080
>> ;branch=z9hG4bK37fe.254ecab744d678154779037580c59731.0
>> Via: SIP/2.0/UDP
>> 50.50.50.210;rport=5060;branch=z9hG4bK37fe.f05cee0feff15d488a12d3758cece7ae.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj472f07568b924214ada83ddfb0fb12b6;alias
>> From: 987654321 <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>;tag=gK0d8c9073
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14320 INVITE
>> Content-Length: 0
>>
>>
>> 2021/09/21 15:31:14.442418 200.200.200.209:5060 -> 50.50.50.182:32818
>> SIP/2.0 183 Session Progress
>> Via: SIP/2.0/TCP 50.50.50.182:5080
>> ;branch=z9hG4bK37fe.254ecab744d678154779037580c59731.0
>> Via: SIP/2.0/UDP
>> 50.50.50.210;rport=5060;branch=z9hG4bK37fe.f05cee0feff15d488a12d3758cece7ae.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj472f07568b924214ada83ddfb0fb12b6;alias
>> From: 987654321 <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>;tag=gK0d8c9073
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14320 INVITE
>> Record-Route:
>> <sip:50.50.50.182:5080;transport=tcp;r2=on;lr=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> Record-Route:
>> <sip:50.50.50.182:5060;r2=on;lr=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> Record-Route:
>> <sip:50.50.50.210:5060;r2=on;lr;ftag=73622588a6084d8ba1bca54781e5094d;vsf=AAAAAFpUAgECBwAABnEBB3ZdWEIAQkVFS0BHX2ljZS5ldQ--;vst=AAAAAAAAAAAKCQ8ABAkHCAYKAgdxQFpGbkJCRktDREFYU1AAV0Qw;did=e8e.bb7;nat=yes>
>> Record-Route:
>> <sip:50.50.50.210:5061;transport=tls;r2=on;lr;ftag=73622588a6084d8ba1bca54781e5094d;vsf=AAAAAFpUAgECBwAABnEBB3ZdWEIAQkVFS0BHX2ljZS5ldQ--;vst=AAAAAAAAAAAKCQ8ABAkHCAYKAgdxQFpGbkJCRktDREFYU1AAV0Qw;did=e8e.bb7;nat=yes>
>> Contact: <sip:123456789 at 200.200.200.209:5060>
>> Allow: INVITE,ACK,CANCEL,BYE,INFO,PRACK,UPDATE,OPTIONS
>> Require: 100rel
>> RSeq: 1509
>> Content-Length: 241
>> Content-Disposition: session; handling=required
>> Content-Type: application/sdp
>>
>> v=0
>> o=Sonus_UAC 12038 7929 IN IP4 200.200.200.209
>> s=SIP Media Capabilities
>> c=IN IP4 200.200.200.212
>> t=0 0
>> m=audio 17366 RTP/AVP 8 101
>> a=rtpmap:8 PCMA/8000
>> a=rtpmap:101 telephone-event/8000
>> a=fmtp:101 0-15
>> a=sendrecv
>> a=maxptime:20
>>
>>
>> 2021/09/21 15:31:14.443990 50.50.50.182:5060 -> 50.50.50.210:5060
>> SIP/2.0 183 Session Progress
>> Via: SIP/2.0/UDP
>> 50.50.50.210;rport=5060;branch=z9hG4bK37fe.f05cee0feff15d488a12d3758cece7ae.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj472f07568b924214ada83ddfb0fb12b6;alias
>> From: 987654321 <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>;tag=gK0d8c9073
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14320 INVITE
>> Record-Route:
>> <sip:50.50.50.182:5080;transport=tcp;r2=on;lr=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> Record-Route:
>> <sip:50.50.50.182:5060;r2=on;lr=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> Record-Route:
>> <sip:50.50.50.210:5060;r2=on;lr;ftag=73622588a6084d8ba1bca54781e5094d;vsf=AAAAAFpUAgECBwAABnEBB3ZdWEIAQkVFS0BHX2ljZS5ldQ--;vst=AAAAAAAAAAAKCQ8ABAkHCAYKAgdxQFpGbkJCRktDREFYU1AAV0Qw;did=e8e.bb7;nat=yes>
>> Record-Route:
>> <sip:50.50.50.210:5061;transport=tls;r2=on;lr;ftag=73622588a6084d8ba1bca54781e5094d;vsf=AAAAAFpUAgECBwAABnEBB3ZdWEIAQkVFS0BHX2ljZS5ldQ--;vst=AAAAAAAAAAAKCQ8ABAkHCAYKAgdxQFpGbkJCRktDREFYU1AAV0Qw;did=e8e.bb7;nat=yes>
>> Contact: <sip:123456789 at 200.200.200.209:5060>
>> Allow: INVITE,ACK,CANCEL,BYE,INFO,PRACK,UPDATE,OPTIONS
>> Require: 100rel
>> RSeq: 1509
>> Content-Length: 253
>> Content-Disposition: session; handling=required
>> Content-Type: application/sdp
>>
>> v=0
>> o=Sonus_UAC 12038 7929 IN IP4 50.50.50.183
>> s=SIP Media Capabilities
>> c=IN IP4 50.50.50.183
>> t=0 0
>> m=audio 29320 RTP/AVP 8 101
>> a=maxptime:20
>> a=rtpmap:8 PCMA/8000
>> a=rtpmap:101 telephone-event/8000
>> a=fmtp:101 0-15
>> a=sendrecv
>> a=rtcp:29321
>>
>>
>> 2021/09/21 15:31:14.743211 50.50.50.210:5060 -> 50.50.50.182:5060
>> PRACK sip:123456789 at 200.200.200.209:5060 SIP/2.0
>> Via: SIP/2.0/UDP
>> 50.50.50.210;branch=z9hG4bK47fe.067d9577e9ab3e30e01745a2cf73b7a4.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj9ab94c339144428bb7ada63b133f2c12;alias
>> Max-Forwards: 69
>> From: "MyUserNAme" <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>;tag=gK0d8c9073
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14321 PRACK
>> Route:
>> <sip:50.50.50.182:5060;lr;r2=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> Route:
>> <sip:50.50.50.182:5080;transport=tcp;lr;r2=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> RAck: 1509 14320 INVITE
>> Content-Length: 0
>>
>>
>> 2021/09/21 15:31:14.786325 50.50.50.182:5060 -> 200.200.200.209:5060
>> PRACK sip:123456789transport=tcp at 200.200.200.209:5060 SIP/2.0
>> Via: SIP/2.0/UDP
>> 50.50.50.182;branch=z9hG4bK47fe.3406fe45bb75c3e955b6aa67e53aff58.0
>> Via: SIP/2.0/UDP
>> 50.50.50.210;rport=5060;branch=z9hG4bK47fe.067d9577e9ab3e30e01745a2cf73b7a4.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj9ab94c339144428bb7ada63b133f2c12;alias
>> Max-Forwards: 68
>> From: "MyUserNAme" <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>;tag=gK0d8c9073
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14321 PRACK
>> RAck: 1509 14320 INVITE
>> Content-Length: 0
>>
>>
>> 2021/09/21 15:31:15.234429 50.50.50.210:5060 -> 50.50.50.182:5060
>> PRACK sip:123456789 at 200.200.200.209:5060 SIP/2.0
>> Via: SIP/2.0/UDP
>> 50.50.50.210;branch=z9hG4bK47fe.067d9577e9ab3e30e01745a2cf73b7a4.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj9ab94c339144428bb7ada63b133f2c12;alias
>> Max-Forwards: 69
>> From: "MyUserNAme" <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>;tag=gK0d8c9073
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14321 PRACK
>> Route:
>> <sip:50.50.50.182:5060;lr;r2=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> Route:
>> <sip:50.50.50.182:5080;transport=tcp;lr;r2=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> RAck: 1509 14320 INVITE
>> Content-Length: 0
>>
>>
>> 2021/09/21 15:31:15.280126 50.50.50.182:5060 -> 200.200.200.209:5060
>> PRACK sip:123456789transport=tcp at 200.200.200.209:5060 SIP/2.0
>> Via: SIP/2.0/UDP
>> 50.50.50.182;branch=z9hG4bK47fe.3406fe45bb75c3e955b6aa67e53aff58.0
>> Via: SIP/2.0/UDP
>> 50.50.50.210;rport=5060;branch=z9hG4bK47fe.067d9577e9ab3e30e01745a2cf73b7a4.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj9ab94c339144428bb7ada63b133f2c12;alias
>> Max-Forwards: 68
>> From: "MyUserNAme" <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>;tag=gK0d8c9073
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14321 PRACK
>> RAck: 1509 14320 INVITE
>> Content-Length: 0
>>
>>
>> 2021/09/21 15:31:16.234279 50.50.50.210:5060 -> 50.50.50.182:5060
>> PRACK sip:123456789 at 200.200.200.209:5060 SIP/2.0
>> Via: SIP/2.0/UDP
>> 50.50.50.210;branch=z9hG4bK47fe.067d9577e9ab3e30e01745a2cf73b7a4.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj9ab94c339144428bb7ada63b133f2c12;alias
>> Max-Forwards: 69
>> From: "MyUserNAme" <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>;tag=gK0d8c9073
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14321 PRACK
>> Route:
>> <sip:50.50.50.182:5060;lr;r2=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> Route:
>> <sip:50.50.50.182:5080;transport=tcp;lr;r2=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> RAck: 1509 14320 INVITE
>> Content-Length: 0
>>
>>
>> 2021/09/21 15:31:16.280111 50.50.50.182:5060 -> 200.200.200.209:5060
>> PRACK sip:123456789transport=tcp at 200.200.200.209:5060 SIP/2.0
>> Via: SIP/2.0/UDP
>> 50.50.50.182;branch=z9hG4bK47fe.3406fe45bb75c3e955b6aa67e53aff58.0
>> Via: SIP/2.0/UDP
>> 50.50.50.210;rport=5060;branch=z9hG4bK47fe.067d9577e9ab3e30e01745a2cf73b7a4.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj9ab94c339144428bb7ada63b133f2c12;alias
>> Max-Forwards: 68
>> From: "MyUserNAme" <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>;tag=gK0d8c9073
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14321 PRACK
>> RAck: 1509 14320 INVITE
>> Content-Length: 0
>>
>>
>> 2021/09/21 15:31:18.234281 50.50.50.210:5060 -> 50.50.50.182:5060
>> PRACK sip:123456789 at 200.200.200.209:5060 SIP/2.0
>> Via: SIP/2.0/UDP
>> 50.50.50.210;branch=z9hG4bK47fe.067d9577e9ab3e30e01745a2cf73b7a4.0;i=baa3
>> Via: SIP/2.0/TLS 10.2.1.160:58568
>> ;received=100.100.100.61;rport=48572;branch=z9hG4bKPj9ab94c339144428bb7ada63b133f2c12;alias
>> Max-Forwards: 69
>> From: "MyUserNAme" <sip:987654321 at sip.mydomain.com
>> >;tag=73622588a6084d8ba1bca54781e5094d
>> To: <sip:123456789 at sip.mydomain.com>;tag=gK0d8c9073
>> Call-ID: 846ffb2f076848c5b8edc876fa1c0d9b
>> CSeq: 14321 PRACK
>> Route:
>> <sip:50.50.50.182:5060;lr;r2=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> Route:
>> <sip:50.50.50.182:5080;transport=tcp;lr;r2=on;ftag=73622588a6084d8ba1bca54781e5094d;did=e8e.c4d1>
>> RAck: 1509 14320 INVITE
>> Content-Length: 0
>>
>> Any help will be much appreciated.
>>
>> Kind regards,
>> Angelo
>>
>
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> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
> Kamailio Advanced Training - Online
> Nov 08-11, 2021 (Europe Timezone) - Nov 22-25, 2021 (America Timezone)
> * https://www.asipto.com/sw/kamailio-advanced-training-online/
>
>
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