[SR-Users] kamailio as SBC for Teams

Fri Apr 10 16:02:44 CEST 2020

You have too many RR of Kamailio, x1 FQDN, x3 IP. Why?

IMO, you should have only 2 of Kamailio, if you're doing transport
conversion. Both FQDNs + ";r2=on". MS clearly says FQDN everywhere, no IP,
especially RR

On Fri, Apr 10, 2020 at 7:06 AM Aidar Kamalov <aidar.kamalov at gmail.com>
wrote:

> Thanks for the answer, I have disabled forse_rport() for Teams side,
> responses now going to address in Via header, but it is not resolved my
> issue, no ACK from Teams :(
>
> чт, 9 апр. 2020 г. в 18:22, Sergiu Pojoga <pojogas at gmail.com>:
>
>> Hi Aydar,
>>
>> Request from MS proxy has  VIA: SIP/2.0/TLS 52.114.7.24:5061, that's
>> where your reply should go. You're sending to 52.114.7.24:1024 instead?
>>
>> Also, looks like you're missing "r2=on" on the other RR, only one has it.
>>
>> Cheers,
>>
>> On Thu, Apr 9, 2020 at 11:09 AM Aidar Kamalov <aidar.kamalov at gmail.com>
>> wrote:
>>
>>> Hello,
>>>
>>> I read https://skalatan.de/en/blog/kamailio-sbc-teams and trying to use
>>> kamailio for teams.
>>> But I faced that MS not responding ACK to my 200OK. Somethin is wrong,
>>> but I don't know what. I call from teams to kamailio.
>>> Can you help me please
>>>
>>> This is initial INVITE from Teams:
>>> 2020/04/09 22:55:17.346092 52.114.7.24:1024 -> KAMAILIO_IP:5061
>>> INVITE sip:+xxxxxxxxx at MY_KAMAILIO_FQDN:5061;user=phone;transport=tls
>>> SIP/2.0
>>> FROM: Aidar Kamalov<sip:+xxxxxxxxx at sip.pstnhub.microsoft.com:5061
>>> ;user=phone>;tag=de28a5b5333b451a97312097f91f5564
>>> TO: <sip:xxxxxxxx at MY_KAMAILIO_FQDN:5061;user=phone>
>>> CSEQ: 1 INVITE
>>> CALL-ID: 3d5ad3cdd01457be94d127fa20478cf1
>>> MAX-FORWARDS: 70
>>> VIA: SIP/2.0/TLS 52.114.7.24:5061;branch=z9hG4bKdb903e2c
>>> RECORD-ROUTE: <sip:sip-du-a-as.pstnhub.microsoft.com:5061
>>> ;transport=tls;lr>
>>> CONTACT: <sip:api-du-a-euno.pstnhub.microsoft.com:443
>>> ;x-i=903eeaac-b19e-43a0-8e75-bb222049922a;x-c=3d5ad3cdd01457be94d127fa20478cf1/d/8/d3d2c2e3f3c14f88bb2fe843b4bc70e4>
>>> CONTENT-LENGTH: 2426
>>> USER-AGENT: Microsoft.PSTNHub.SIPProxy v.2020.4.4.3 i.ASEA.5
>>> CONTENT-TYPE: application/sdp
>>> ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY
>>>
>>> v=0
>>> o=- 0 0 IN IP4 52.114.252.146
>>> s=session
>>> c=IN IP4 52.114.252.146
>>> b=CT:50000
>>> t=0 0
>>> m=audio 52939 RTP/SAVP 104 9 111 18 0 8 103 97 13 118 119 101
>>> a=rtcp:52925
>>> a=ice-ufrag:rKBm
>>> a=ice-pwd:BkjUnkfIvYV5pjteSteevL1O
>>> a=rtcp-mux
>>> a=candidate:4 1 UDP 184547839 52.114.252.146 52939 typ relay raddr
>>> 31.13.144.55 rport 57780
>>> a=candidate:4 2 UDP 184547326 52.114.252.146 52925 typ relay raddr
>>> 31.13.144.55 rport 57781
>>> a=candidate:1 1 tcp-act 2121006590 100.78.247.179 1024 typ host
>>> a=candidate:1 2 tcp-act 2121006590 100.78.247.179 1024 typ host
>>> a=candidate:2 1 UDP 2130705919 100.78.247.179 39182 typ host
>>> a=candidate:2 2 UDP 2130705406 100.78.247.179 39183 typ host
>>> a=candidate:3 1 UDP 1694497791 31.13.144.55 57780 typ srflx raddr
>>> 100.78.247.179 rport 39182
>>> a=candidate:3 2 UDP 1694497278 31.13.144.55 57781 typ srflx raddr
>>> 100.78.247.179 rport 39183
>>> a=candidate:5 1 tcp-act 1684796926 31.13.144.55 9761 typ srflx raddr
>>> 100.78.247.179 rport 41775
>>> a=candidate:5 2 tcp-act 1684796926 31.13.144.55 9761 typ srflx raddr
>>> 100.78.247.179 rport 41775
>>> a=candidate:6 1 tcp-pass 174453758 52.114.252.130 59925 typ relay raddr
>>> 31.13.144.55 rport 9761
>>> a=candidate:6 2 tcp-pass 174453758 52.114.252.130 59925 typ relay raddr
>>> 31.13.144.55 rport 9761
>>> a=candidate:7 1 tcp-act 174846462 52.114.252.130 59925 typ relay raddr
>>> 31.13.144.55 rport 9761
>>> a=candidate:7 2 tcp-act 174846462 52.114.252.130 59925 typ relay raddr
>>> 31.13.144.55 rport 9761
>>> a=x-candidate-info:4 network-type=WWAN
>>> a=x-candidate-info:1 network-type=WWAN
>>> a=x-candidate-info:2 network-type=WWAN
>>> a=x-candidate-info:3 network-type=WWAN
>>> a=x-candidate-info:5 network-type=WWAN
>>> a=x-candidate-info:6 network-type=WWAN
>>> a=x-candidate-info:7 network-type=WWAN
>>> a=crypto:1 AES_CM_128_HMAC_SHA1_32
>>> inline:DY3r3DWRojJm94CJQ83OAavmlRCwPf5ciRxHCT40|2^31
>>> a=crypto:2 AES_CM_128_HMAC_SHA1_80
>>> inline:DY3r3DWRojJm94CJQ83OAavmlRCwPf5ciRxHCT40|2^31
>>> a=crypto:3 AES_CM_128_HMAC_SHA1_80
>>> inline:DY3r3DWRojJm94CJQ83OAavmlRCwPf5ciRxHCT40|2^31|1:1
>>> a=rtpmap:104 SILK/16000
>>> a=fmtp:104 useinbandfec=1; usedtx=0
>>> a=rtpmap:9 G722/8000
>>> a=rtpmap:111 SIREN/16000
>>> a=fmtp:111 bitrate=16000
>>> a=rtpmap:18 G729/8000
>>> a=rtpmap:0 PCMU/8000
>>> a=rtpmap:8 PCMA/8000
>>> a=rtpmap:103 SILK/8000
>>> a=fmtp:103 useinbandfec=1; usedtx=0
>>> a=rtpmap:97 RED/8000
>>> a=rtpmap:13 CN/8000
>>> a=rtpmap:118 CN/16000
>>> a=rtpmap:119 CN/24000
>>> a=rtpmap:101 telephone-event/8000
>>> a=fmtp:101 0-16
>>> a=ptime:20
>>> a=maxptime:200
>>>
>>>
>>>
>>> and my 200OK to MS is:
>>>
>>> 2020/04/09 22:55:19.976427 KAMAILIO_IP:5061 -> 52.114.7.24:1024
>>> SIP/2.0 200 OK
>>> Record-Route:
>>> <sip:KAMAILIO_FQDN_DOMAIN:5061;transport=tls;ftag=de28a5b5333b451a97312097f91f5564;lr=on>
>>> Record-Route:
>>> <sip:KAMAILIO_IP:5060;ftag=de28a5b5333b451a97312097f91f5564;lr=on>
>>> Via: SIP/2.0/TLS 52.114.7.24:5061;rport=1024;branch=z9hG4bKdb903e2c
>>> Record-Route:
>>> <sip:ENDPOINT_BEHIND_KAMAILIO_IP;line=sr-QyfKA15Kw1rKw1hKEoPljM0oE1VLX10RQ1VLX10gkY37WJufE1BBjJhVE6E6r14VEJ5Nj6ElE1UNjyrNEJrVjnr.AyudmMV1rg52rJrlAyNBkMVNmSE*>
>>> Record-Route:
>>> <sip:ENDPOINT_BEHIND_KAMAILIO_IP;r2=on;lr=on;ftag=de28a5b5333b451a97312097f91f5564;did=cba.af1;nat=yes>
>>> Record-Route:
>>> <sip:KAMAILIO_IP;r2=on;lr=on;ftag=de28a5b5333b451a97312097f91f5564;did=cba.42a1;nat=yes>
>>> Record-Route:
>>> <sip:KAMAILIO_IP:5061;transport=tls;r2=on;lr=on;ftag=de28a5b5333b451a97312097f91f5564;did=cba.42a1;nat=yes>
>>> Record-Route: <sip:sip-du-a-as.pstnhub.microsoft.com:5061
>>> ;transport=tls;lr>
>>> To: <sip:+xxxxxxxxxx at KAMAILIO_FQDN_DOMAIN
>>> :5061;user=phone>;tag=3795432917-393759697
>>> From: <sip:+xxxxxxxxxx at sip.pstnhub.microsoft.com:5061
>>> ;user=phone>;tag=de28a5b5333b451a97312097f91f5564
>>> Call-ID: 3d5ad3cdd01457be94d127fa20478cf1
>>> CSeq: 1 INVITE
>>> Allow:
>>> PUBLISH,MESSAGE,UPDATE,PRACK,SUBSCRIBE,REFER,INFO,NOTIFY,REGISTER,OPTIONS,BYE,INVITE,ACK,CANCEL
>>> Content-Type: application/sdp
>>> Accept: application/sdp
>>> Content-Length: 282
>>> User-Agent: MY_DOMAIN
>>> Contact:
>>> <sip:KAMAILIO_IP;line=sr-DHZToOtmMdn7MODy9AnmD10TGLpUrL4noJCE4A03DdQE9LUaMXr*>
>>>
>>> v=0
>>> o=ETPI-MSX1 0 0 IN IP4 KAMAILIO_IP
>>> s=sip call
>>> c=IN IP4 KAMAILIO_IP
>>> t=0 0
>>> m=audio 12176 RTP/SAVP 8
>>> b=AS:64
>>> a=maxptime:20
>>> a=rtpmap:8 PCMA/8000
>>> a=sendrecv
>>> a=rtcp:12177
>>> a=crypto:1 AES_CM_128_HMAC_SHA1_32
>>> inline:03ZmcR+CxxB7k7C8QvWBgseYq7cH7py7VxqfLM8j
>>> a=ptime:20
>>>
>>>
>>> --
>>> Aydar A. Kamalov
>>> _______________________________________________
>>> Kamailio (SER) - Users Mailing List
>>> sr-users at lists.kamailio.org
>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
>
>
> --
> Aydar A. Kamalov
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
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