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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">With STIR/SHAKEN (in theory) all calls will be signed, authenticated so you can trace the originating carrier. In an open peering environment you can use it to accept/reject calls<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Open SIP proxy handles all of the SIP traffic, RTP goes directly between carriers.<br>
All calls originated must be signed (STIRred)<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l1 level1 lfo2">Call isn’t signed, gets rejected by the SIP peering proxy<o:p></o:p></li></ul>
<p class="MsoNormal">Terminating carrier can validate the signed calls (SHAKEN)<o:p></o:p></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraph" style="margin-left:-12.75pt;mso-list:l0 level1 lfo1">
Don’t like the signing CA? reject the call<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:-12.75pt;mso-list:l0 level1 lfo1">
Don’t like the signing carrier? Reject the call<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:-12.75pt;mso-list:l0 level1 lfo1">
Carrier sending too many spam calls, adjust treatment based on customer spam settings<o:p></o:p></li></ul>
<p class="MsoListParagraph" style="margin-left:23.25pt"><o:p> </o:p></p>
<p class="MsoNormal">Routing is handled between terminating carrier and SIP peering proxy. Originating carrier sends all calls to peering proxy first, if proxy doesn’t have the route it sends a 4XX error back and originating carrier can continue routing on
other paths.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So terminating carriers would need to export/upload (hacked BGP?) numbers they are willing to receive calls on to the peering proxy.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Proxies can be spun up in various AWS/Azure/GoogleCloud VPS<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">Pinchas Neiman <neimanpinchas@gmail.com><br>
<b>Date: </b>Wednesday, October 25, 2023 at 11:18 AM<br>
<b>To: </b>Jawaid Bazyar <jawaid@bazyar.net><br>
<b>Cc: </b>Matthew Crocker <matthew@corp.crocker.com>, voiceops <voiceops@voiceops.org><br>
<b>Subject: </b>Re: [VoiceOps] Voice Peering<o:p></o:p></span></p>
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<p class="MsoNormal" style="line-height:12.0pt;background:#FFEB9C"><span style="font-size:10.0pt;color:#9C6500">CAUTION:</span><span style="font-size:10.0pt;color:black"> This email originated from outside of Crocker. Do not click links or open attachments
unless you recognize the sender and know the content is safe.<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">By reading the RFCs I was able to grasp 75% of it, it's well written and covers your
<b>clear </b>constraint, at least on how to verify the SIP header comes from a trustworthy authority (If you agree on the root authority)<o:p></o:p></p>
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<p class="MsoNormal">Practically implementing STIR/SHAKEN has bureaucracy involved.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Oct 24, 2023 at 9:38 PM Jawaid Bazyar via VoiceOps <<a href="mailto:voiceops@voiceops.org">voiceops@voiceops.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Is there a good clear document somewhere describing how STIR/SHAKEN is supposed to work?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Oct 24, 2023 at 9:33 PM Matthew Crocker via VoiceOps <<a href="mailto:voiceops@voiceops.org" target="_blank">voiceops@voiceops.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
> On Oct 24, 2023, at 9:13 PM, Peter Beckman via VoiceOps <<a href="mailto:voiceops@voiceops.org" target="_blank">voiceops@voiceops.org</a>> wrote:<br>
> <br>
> CAUTION: This email originated from outside of Crocker. Do not click links or open attachments unless you recognize the sender and know the content is safe.<br>
> <br>
> <br>
> The challenge is how do you authenticate the end "carrier" or service<br>
> provider?<br>
> <br>
<br>
STIR/SHAKEN<br>
<br>
<br>
> Sure, anyone who leases numbers directly from NANPA can look up the carrier<br>
> of record and exchange traffic directly, but any business who also leases<br>
> numbers INDIRECTLY gets cut out and still needs to pay their upstream<br>
> carrier(s) to place/receive calls, either by channels or per minute, even<br>
> if their upstream is directly peered and not transiting the PSTN at all.<br>
> <br>
> If this would be for the end user, then NANPA would have to delegate to the<br>
> leasee, the leasee delegate to the reseller, the reseller to the end user,<br>
> then the end user could publish their VoIP contact info, and anyone could<br>
> call directly via VoIP, cutting out all of the middle peers.<br>
> <br>
> But, as another person said, this is ripe for abuse, and with no motivation<br>
> by NANPA or the larger carriers to make calls less expensive for the<br>
> reseller or end user, I see this going nowhere. Until there is some value<br>
> in NANPA (plus all the other country telephony organizations) and the<br>
> direct carriers leasing numbers to do so.<br>
> <br>
> Beckman<br>
> <br>
>> On Tue, 24 Oct 2023, Ross Tajvar via VoiceOps wrote:<br>
>> <br>
>> I can think of a few ways that could be adapted into a platform more like<br>
>> an Internet exchange, but as others have said, it just doesn't seem worth<br>
>> it.<br>
>> <br>
>> On Tue, Oct 24, 2023, 5:31 PM Jawaid Bazyar via VoiceOps <<br>
>> <a href="mailto:voiceops@voiceops.org" target="_blank">voiceops@voiceops.org</a>> wrote:<br>
>> <br>
>>> I think schemes like DUNDI (and some of the others mentioned here) suffer<br>
>>> from a trust issue – what’s to prevent operator X from poisoning the<br>
>>> protocol with bogus “stolen” numbers?<br>
>>> <br>
>>> <br>
>>> <br>
>>> On Tue, Oct 24, 2023 at 5:25 PM Jared Smith via VoiceOps <<br>
>>> <a href="mailto:voiceops@voiceops.org" target="_blank">voiceops@voiceops.org</a>> wrote:<br>
>>> <br>
>>>> On Tue, Oct 24, 2023 at 8:49 AM Mike Hammett via VoiceOps <<br>
>>>> <a href="mailto:voiceops@voiceops.org" target="_blank">voiceops@voiceops.org</a>> wrote:<br>
>>>> <br>
>>>>> This was in another thread, but I broke it out into it's own<br>
>>>>> conversation. Someone had asked:<br>
>>>>> <br>
>>>>> ---<br>
>>>>> I am joining this thread late, but, would anyone out there be interested<br>
>>>>> in exchanging traffic with other carriers directly over SIP?<br>
>>>>> <br>
>>>> <br>
>>>> Just another point of VoIP history trivia at this point... but in<br>
>>>> addition to things like ENUM and ITAD, Mark Spencer of Asterisk fame also<br>
>>>> invented Dundi, which was an encrypted peer-to-peer protocol for route<br>
>>>> advertisement and discovery. As far as I know, very few people besides me<br>
>>>> ever put it in production, but it worked really well at the time. (Of<br>
>>>> course, it's been about 17 or 18 years now since I used it in production.)<br>
>>>> <br>
>>>> -Jared<br>
>>>> _______________________________________________<br>
>>>> VoiceOps mailing list<br>
>>>> <a href="mailto:VoiceOps@voiceops.org" target="_blank">VoiceOps@voiceops.org</a><br>
>>>> <a href="https://puck.nether.net/mailman/listinfo/voiceops" target="_blank">
https://puck.nether.net/mailman/listinfo/voiceops</a><br>
>>>> <br>
>>> _______________________________________________<br>
>>> VoiceOps mailing list<br>
>>> <a href="mailto:VoiceOps@voiceops.org" target="_blank">VoiceOps@voiceops.org</a><br>
>>> <a href="https://puck.nether.net/mailman/listinfo/voiceops" target="_blank">https://puck.nether.net/mailman/listinfo/voiceops</a><br>
>>> <br>
>> <br>
> <br>
> ---------------------------------------------------------------------------<br>
> Peter Beckman Internet Guy<br>
> <a href="mailto:beckman@angryox.com" target="_blank">beckman@angryox.com</a>
<a href="https://www.angryox.com/" target="_blank">https://www.angryox.com/</a><br>
> ---------------------------------------------------------------------------<br>
> _______________________________________________<br>
> VoiceOps mailing list<br>
> <a href="mailto:VoiceOps@voiceops.org" target="_blank">VoiceOps@voiceops.org</a><br>
> <a href="https://puck.nether.net/mailman/listinfo/voiceops" target="_blank">https://puck.nether.net/mailman/listinfo/voiceops</a><br>
> _______________________________________________<br>
> VoiceOps mailing list<br>
> <a href="mailto:VoiceOps@voiceops.org" target="_blank">VoiceOps@voiceops.org</a><br>
> <a href="https://puck.nether.net/mailman/listinfo/voiceops" target="_blank">https://puck.nether.net/mailman/listinfo/voiceops</a><br>
_______________________________________________<br>
VoiceOps mailing list<br>
<a href="mailto:VoiceOps@voiceops.org" target="_blank">VoiceOps@voiceops.org</a><br>
<a href="https://puck.nether.net/mailman/listinfo/voiceops" target="_blank">https://puck.nether.net/mailman/listinfo/voiceops</a><o:p></o:p></p>
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<p class="MsoNormal">_______________________________________________<br>
VoiceOps mailing list<br>
<a href="mailto:VoiceOps@voiceops.org" target="_blank">VoiceOps@voiceops.org</a><br>
<a href="https://puck.nether.net/mailman/listinfo/voiceops" target="_blank">https://puck.nether.net/mailman/listinfo/voiceops</a><o:p></o:p></p>
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<p class="MsoNormal"><span class="gmailsignatureprefix">-- </span><o:p></o:p></p>
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<p class="MsoNormal"><b>Pinchas S. Neiman</b><o:p></o:p></p>
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<p class="MsoNormal">Software Engineer At ESEQ Technology Corp.<o:p></o:p></p>
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<p class="MsoNormal">845.213.1229 #2<o:p></o:p></p>
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<p class="MsoNormal"><span style="border:solid windowtext 1.0pt;padding:0in"><img border="0" width="200" height="68" style="width:2.0833in;height:.7083in" id="_x0000_i1025" src="cid:~WRD0000.jpg" alt="Image removed by sender."></span><o:p></o:p></p>
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