[SR-Users] kamailio as SBC for Teams

Fri Apr 10 18:24:47 CEST 2020

Contact:
<sip:KAMAILIO_IP;line=sr-DHZToOtmMdn7MODy9AnmD10TGLpUrL4noJCE4A03DdQE9LUaMXr*>

Again, MS says it expects FQDN in Contact.

If you are re-writing the Contact received from
ENDPOINT_BEHIND_KAMAILIO_IP, then I suggest you don't, it's sufficient to
have FQDN in RR. This isn't a "[certified] SBC", if it was like MS says -
it shouldn't work at all with a proxy like Kamailio.

On Fri, Apr 10, 2020 at 12:00 PM Sergiu Pojoga <pojogas at gmail.com> wrote:

> You're likely referring to this:
>
> *Priority 1. Top-level Record-Route. If the top-level Record-Route
> contains the FQDN name or IP, the FQDN name or IP is used to make the
> outbound in-dialog connection.*
>
> Like with many Microsoft products, nobody knows precisely what they
> expect. To make matters worse - they don't reply back suggesting what's
> wrong, no tools on their side to troubleshoot.
>
> Regardless, why do you have 3 RRs of Kamailio? Fix the RRs, try again, or
> don't, it's up to you.
>
> Good luck.
>
> --Sergiu
>
>
> On Fri, Apr 10, 2020 at 11:42 AM Aidar Kamalov <aidar.kamalov at gmail.com>
> wrote:
>
>> I thought they look only at first RR field?
>>
>> пт, 10 апр. 2020 г. в 17:03, Sergiu Pojoga <pojogas at gmail.com>:
>>
>>> 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
>>>>
>>> _______________________________________________
>>> 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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