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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I am a glutton for punishment, so for our PoC deployment we have a hybrid connector cluster, and a B2B/MRA cluster that does everything else.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">We have no non-numeric URIs, so I use CPL rules (going to move that to XML since managing them otherwise is not great) to accept calls formatted to my “collaboration
endpoints” (ce-…) and customer URIs which all start with a letter. Calls targeted directly at the expressway, elsewise to the domains, or E164 calls with no domain are all dropped.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The Expressway doesn’t accept in anything that would be directly routable once it hits the UCM to try and avoid this problem.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">While it is certainly possible I suppose to have an authenticated zone that can place dialable calls out via UCM, CUBE, SBC, etc that seems like not the best
idea, but impossible as a Webex endpoint won’t get you there.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Out of the ~1000 calls in the Expressway E cluster’s history, spanning about the last two hours, 4 of them were legit from MRA clients and the rest were spam
so I would not want to leave any opportunity there either.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> cisco-voip <cisco-voip-bounces@puck.nether.net>
<b>On Behalf Of </b>Lelio Fulgenzi<br>
<b>Sent:</b> Saturday, October 5, 2019 10:13 AM<br>
<b>To:</b> Ryan Huff <ryanhuff@outlook.com><br>
<b>Cc:</b> cisco-voip voyp list <cisco-voip@puck.nether.net><br>
<b>Subject:</b> Re: [cisco-voip] SIP Domain substitution<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"><o:p> </o:p></p>
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<p class="MsoNormal">Yeah. I hear ya. I’ll have to do more research. To see how much effort is actually required.
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">My biggest concern is enabling PSTN access and not opening up a security exposure. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I was at the collab techtorial where the presenter put the fear of Dog into us about spinning up a separate expressway cluster to ensure no pstn abuse. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I’ll try with Macros first. If I can get extension dialing easy enough, it buys me s proof of concept that can get me more support. <o:p></o:p></p>
<div id="AppleMailSignature">
<p class="MsoNormal"><i>-sent from mobile device-</i><o:p></o:p></p>
<p class="MsoNormal"><b><br>
<br>
</b><o:p></o:p></p>
<p class="MsoNormal"><b>Lelio Fulgenzi, B.A.</b> | Senior Analyst<o:p></o:p></p>
<p class="MsoNormal">Computing and Communications Services | University of Guelph<o:p></o:p></p>
<p class="MsoNormal">Room 037 Animal Science & Nutrition Bldg | <a href="x-apple-data-detectors://1/0">50 Stone Rd E | Guelph, ON | N1G 2W1</a><o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"><a href="tel:519-824-4120;56354">519-824-4120 Ext. 56354</a> | <a href="mailto:lelio@uoguelph.ca">lelio@uoguelph.ca</a></span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"><a href="http://www.uoguelph.ca/ccs">www.uoguelph.ca/ccs</a> | @UofGCCS on Instagram, Twitter and Facebook</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><img border="0" width="187" height="100" style="width:1.9479in;height:1.0416in" id="Picture_x0020_1" src="cid:image001.png@01D3DD7E.EC708050" alt="University of Guelph Cornerstone with Improve Life tagline"><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
On Oct 5, 2019, at 9:36 AM, Ryan Huff <<a href="mailto:ryanhuff@outlook.com">ryanhuff@outlook.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Webex Hybrid Calling definitely sounds like a good fit for you then; it’ll also give your cloud registered devices a way to dial the on-prem extensions.
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Basically, when the cloud registered device is setup, you select Hybrid calling as the PSTN service (assuming Hybrid calling has already been setup) and then it sends signaling to CUCM via Expressway-C > CUCM. The effective media path is
device <> cloud. <o:p></o:p></p>
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<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">If you have Expressway B2B, you can also leverage that to allow your cloud devices to make B2B SIP calls via Cloud > Expressway-C > CUCM > Expressway-C > Expressway-E > Internet. The idea was to make Hybrid Calling for cloud devices “transparent”
to the user over cloud calling in terms of PSTN capabilities, with the added feature of interacting with on-prem extensions as if the device was registered on-prem.<o:p></o:p></p>
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<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">There are more than a few scenarios where Webex Hybrid calling will trombone the call, and it’s by design and due to the nature of the scenario. Under the hood, the call legs and SIP messages can get hairy from
a troubleshooting perspective (TranslatorX is a beast for this), and Cisco has had more than a few complaints about it, but it is what it is.<o:p></o:p></p>
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<p class="MsoNormal">Sent from my iPhone<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-bottom:12.0pt">On Oct 4, 2019, at 23:40, Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca">lelio@uoguelph.ca</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"></span> <o:p>
</o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I’m trying to do a bit of everything, really. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In our case, I’d like to have a few cloud registered WebEx room devices still be able to call our extensions. It’s the one thing we loose vs. on-prem reg WebEx room devices. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I still have to get it working (I’m guessing there are IP address ranges I have to permit) but a cloud registered device can call <ext>@myphone.acme.com<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If I can create a macro on cloud registered devices like you can on CE devices, then it gives me that functionality. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">We don’t have Webex Teams deployed. We don’t have Webex pstn / calling enabled. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">So it’s either a hybrid call setup or a macro. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I’ll have to investigate further. <o:p></o:p></p>
<div id="AppleMailSignature">
<p class="MsoNormal"><i>-sent from mobile device-</i><o:p></o:p></p>
<p class="MsoNormal"><b><br>
<br>
</b><o:p></o:p></p>
<p class="MsoNormal"><b>Lelio Fulgenzi, B.A.</b> | Senior Analyst<o:p></o:p></p>
<p class="MsoNormal">Computing and Communications Services | University of Guelph<o:p></o:p></p>
<p class="MsoNormal">Room 037 Animal Science & Nutrition Bldg | <a href="x-apple-data-detectors://1/0">50 Stone Rd E | Guelph, ON | N1G 2W1</a><o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"><a href="tel:519-824-4120;56354">519-824-4120 Ext. 56354</a> | <a href="mailto:lelio@uoguelph.ca">lelio@uoguelph.ca</a></span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"><a href="https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.uoguelph.ca%2Fccs&data=02%7C01%7C%7Cb16503f6614e48ab04dc08d74945d472%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637058436587224475&sdata=K8Hkz7W%2F3ijLyQTh0Nc6ZgnMbiXTurUDovMLe%2FjqT6k%3D&reserved=0">www.uoguelph.ca/ccs</a> |
@UofGCCS on Instagram, Twitter and Facebook</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><img border="0" width="187" height="100" style="width:1.9479in;height:1.0416in" id="_x0000_i1026" src="cid:image001.png@01D3DD7E.EC708050" alt="University of Guelph Cornerstone with Improve Life tagline"><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
On Oct 4, 2019, at 11:25 PM, Anthony Holloway <<a href="mailto:avholloway+cisco-voip@gmail.com">avholloway+cisco-voip@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Wait, I thought this was for other businesses to call you. Are you saying that to call within your own cloud you have to dial that giant URI? Is there no directory, or extension dialing? Clearly, I have not done a single Webex calling
deployment yet.<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 Fri, Oct 4, 2019 at 10:06 PM Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca">lelio@uoguelph.ca</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Ok. Looking at it from the other way around, could I create a macro(?) on the cloud registered devices that ask for a 5 digit extension and then add the appropriate SIP domain to the extension to place the call?<o:p></o:p></p>
<div id="gmail-m_-6836782251036819310AppleMailSignature">
<p class="MsoNormal"><i>-sent from mobile device-</i><o:p></o:p></p>
<p class="MsoNormal"><b><br>
<br>
</b><o:p></o:p></p>
<p class="MsoNormal"><b>Lelio Fulgenzi, B.A.</b> | Senior Analyst<o:p></o:p></p>
<p class="MsoNormal">Computing and Communications Services | University of Guelph<o:p></o:p></p>
<p class="MsoNormal">Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON | N1G 2W1<o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"><a href="tel:519-824-4120;56354" target="_blank">519-824-4120 Ext. 56354</a> | <a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a></span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"><a href="https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.uoguelph.ca%2Fccs&data=02%7C01%7C%7Cb16503f6614e48ab04dc08d74945d472%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637058436587234480&sdata=hP1iUi1T8p7kIR8cnYIG6z3JKod80gGGYp47f1seNCA%3D&reserved=0" target="_blank">www.uoguelph.ca/ccs</a> |
@UofGCCS on Instagram, Twitter and Facebook</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><img border="0" width="187" height="100" style="width:1.9479in;height:1.0416in" id="gmail-m_-6836782251036819310Picture_x0020_1" src="cid:" alt="University of Guelph Cornerstone with Improve Life tagline"><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
On Oct 4, 2019, at 10:32 PM, Ryan Huff <<a href="mailto:ryanhuff@outlook.com" target="_blank">ryanhuff@outlook.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Webex Hybrid Calling (with Expressway B2B), could in theory, help accomplish this. The codec is still cloud registered, though Hybrid calling would allow for an on-prem URI to be associated with the Webex remote destination of the codec.
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The call would come into the on-prem URI via B2B like normal, and assuming the Hybrid integration was setup correctly, ring the Webex remote destination which rings the cloud registered codec.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">It’s a little bit of an ugly trombone, but it does 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">Sent from my iPhone<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-bottom:12.0pt">On Oct 4, 2019, at 22:09, Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"></span> <o:p>
</o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Darn. Double darn. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Let’s hope webex offers up custom domain registration for devices soon. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">‘Cause <a href="mailto:room123@acme.rooms.webex.com" target="_blank">
room123@acme.rooms.webex.com</a> is a bit much. <o:p></o:p></p>
<div id="gmail-m_-6836782251036819310AppleMailSignature">
<p class="MsoNormal"><i>-sent from mobile device-</i><o:p></o:p></p>
<p class="MsoNormal"><b><br>
<br>
</b><o:p></o:p></p>
<p class="MsoNormal"><b>Lelio Fulgenzi, B.A.</b> | Senior Analyst<o:p></o:p></p>
<p class="MsoNormal">Computing and Communications Services | University of Guelph<o:p></o:p></p>
<p class="MsoNormal">Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON | N1G 2W1<o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"><a href="tel:519-824-4120;56354" target="_blank">519-824-4120 Ext. 56354</a> | <a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a></span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"><a href="https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.uoguelph.ca%2Fccs&data=02%7C01%7C%7Cb16503f6614e48ab04dc08d74945d472%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637058436587244485&sdata=up%2BFCTMM56ltoeiCLOkkoDz%2BjVc8Tpe6Z9kkqE7rUPs%3D&reserved=0" target="_blank">www.uoguelph.ca/ccs</a> |
@UofGCCS on Instagram, Twitter and Facebook</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><img border="0" width="187" height="100" style="width:1.9479in;height:1.0416in" id="_x0000_i1028" src="cid:" alt="University of Guelph Cornerstone with Improve Life tagline"><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
On Oct 4, 2019, at 9:05 PM, Ryan Huff <<a href="mailto:ryanhuff@outlook.com" target="_blank">ryanhuff@outlook.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">What it sounds like you are trying to do to me, is allow the call to ultimately setup with a URI different than the URI that was dialed, without the calling party being the wiser.
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">DNS won’t be able to do anything with regards to that I don’t think, because it really sounds like you’re trying to manipulate/transform the called URI, and you’ll need something to interact with the SIP message stack for that I’d think.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">You can create a round robin A record, that resolves to multiple IP addresses, so when the client looks up the DNS SRV, it receives multiple targets to try before considering the SRV target “unreachable” (SRV weights and priorities determine
the ordering of the target addresses resolved for the client). However, this won’t have the ability to change the called URI, which is ultimately what I think you’re attempting in the scenario (DNS and SIP messages are on different networking layers).<o:p></o:p></p>
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<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">As Dave mentioned below, Expressway or a LUA script (sip normalization) in CUCM seems to be uniquely qualified for what you’re wanting to do.<o:p></o:p></p>
<div>
<p class="MsoNormal">Sent from my iPhone<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-bottom:12.0pt">On Oct 4, 2019, at 20:40, Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a>> wrote:<o:p></o:p></p>
</blockquote>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"></span> <o:p>
</o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal">I’ve seen some references to Cisco SIP proxy server. <o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Would that help?<o:p></o:p></p>
<div id="gmail-m_-6836782251036819310AppleMailSignature">
<p class="MsoNormal"><i>-sent from mobile device-</i><o:p></o:p></p>
<p class="MsoNormal"><b><br>
<br>
</b><o:p></o:p></p>
<p class="MsoNormal"><b>Lelio Fulgenzi, B.A.</b> | Senior Analyst<o:p></o:p></p>
<p class="MsoNormal">Computing and Communications Services | University of Guelph<o:p></o:p></p>
<p class="MsoNormal">Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON | N1G 2W1<o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"><a href="tel:519-824-4120;56354" target="_blank">519-824-4120 Ext. 56354</a> | <a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a></span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="color:black"><a href="https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.uoguelph.ca%2Fccs&data=02%7C01%7C%7Cb16503f6614e48ab04dc08d74945d472%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637058436587254496&sdata=%2BDWdd5Bj2baDh9yla7QDgc4Qiig1S6ki26u5adIEN7w%3D&reserved=0" target="_blank">www.uoguelph.ca/ccs</a> |
@UofGCCS on Instagram, Twitter and Facebook</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><img border="0" width="187" height="100" style="width:1.9479in;height:1.0416in" id="_x0000_i1029" src="cid:" alt="University of Guelph Cornerstone with Improve Life tagline"><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
On Oct 4, 2019, at 7:46 PM, Ryan Huff <<a href="mailto:ryanhuff@outlook.com" target="_blank">ryanhuff@outlook.com</a>> wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">According to RFC 2782 (<a href="https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Frfc%2Frfc2782.txt&data=02%7C01%7C%7Cb16503f6614e48ab04dc08d74945d472%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637058436587264501&sdata=T5gNO4TAfOEFXaKUKLBLleyj1GtmxSXVzc2BAMbXC5E%3D&reserved=0" target="_blank">https://www.ietf.org/rfc/rfc2782.txt</a>),
it does not, under the “Target Definition”; “there must be one or more address records for this name, the name must not be an alias”.
<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">However, I can tell you that I have used a CNAME in the SRV target field before, and it appeared to work at the time. Still, depending on the application, doing so could potentially cause some weird issue with regards to PTR or something.<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Sent from my iPhone<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-bottom:12.0pt">On Oct 4, 2019, at 19:10, Brian Meade <<a href="mailto:bmeade90@vt.edu" target="_blank">bmeade90@vt.edu</a>> wrote:<o:p></o:p></p>
</blockquote>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"></span> <o:p>
</o:p></p>
<div>
<p class="MsoNormal">I don't think DNS SRV records support CNAME. Even then, it would only change where it was sent to and not the SIP headers.<o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">On Fri, Oct 4, 2019 at 12:26 PM Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a>> wrote:<o:p></o:p></p>
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<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Yeah – I’d want this to happen all within DNS. But of course, in a supported fashion. I’m not interested in spending time modifying infrastructure at this time.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I’ve done some searching, and there’s talk of RR records, but we haven’t found much documentation.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Arial",sans-serif">---</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-family:"Arial",sans-serif">Lelio Fulgenzi, B.A.</span></b><span style="font-family:"Arial",sans-serif"> | Senior Analyst</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Arial",sans-serif;color:#333333">Computing and Communications Services</span><span style="font-family:"Arial",sans-serif"> | University of Guelph</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Arial",sans-serif">Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON | N1G 2W1</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Arial",sans-serif">519-824-4120 Ext. 56354 |
<a href="mailto:lelio@uoguelph.ca" target="_blank"><span style="color:#0563C1">lelio@uoguelph.ca</span></a></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Arial",sans-serif"> </span><o:p></o:p></p>
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| @UofGCCS on Instagram, Twitter and Facebook</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Arial",sans-serif"> </span><o:p></o:p></p>
<div>
<p class="MsoNormal"><image001.png><o:p></o:p></p>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>From:</b> Dave Goodwin <<a href="mailto:dave.goodwin@december.net" target="_blank">dave.goodwin@december.net</a>>
<br>
<b>Sent:</b> Friday, October 4, 2019 12:09 PM<br>
<b>To:</b> Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a>><br>
<b>Cc:</b> cisco-voip voyp list <<a href="mailto:cisco-voip@puck.nether.net" target="_blank">cisco-voip@puck.nether.net</a>><br>
<b>Subject:</b> Re: [cisco-voip] SIP Domain substitution<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Tahoma",sans-serif">Are you wanting this to all happen within DNS instead of happening within a SIP UA? As far as I understand, if DNS redirected somewhere
(SRV or CNAME record for example) it would not change the destination URI the originator is trying to reach. The SIP protocol has redirection codes (such as 301 or 302) but whether or how you might be able to use them depends on the SIP UAs being used.</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Tahoma",sans-serif"> </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Tahoma",sans-serif">You might also be able to use something like a SIP normalization script (CUCM), SIP profiles (CUBE), or maybe search pattern replacements
(Expressway) to just translate the domain as calls flow in/out. I'm guessing what might be feasible without knowing more of the picture.</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Fri, Oct 4, 2019 at 11:10 AM Lelio Fulgenzi <<a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a>> wrote:<o:p></o:p></p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt">
<div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Does SIP allow for domain name substitution?
<o:p></o:p></p>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">By this I mean, instead of advertising or dialing
<a href="mailto:coyote@phones.america.acmemanufacturing.com" target="_blank">coyote@phones.america.acmemanufacturing.com</a> I want to use
<a href="mailto:coyote@zing.com" target="_blank">coyote@zing.com</a><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">But I don’t want to have to reorganize and reprogram anything. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">I just want the DNS to say, “hey, use this domain instead and try again.”<o:p></o:p></p>
<div id="gmail-m_-6836782251036819310gmail-m_-7733743004462058063gmail-m_-9160086299379446812AppleMailSignature">
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><i>-sent from mobile device-</i><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>Lelio Fulgenzi, B.A.</b> | Senior Analyst<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Computing and Communications Services | University of Guelph<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON | N1G 2W1<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"><a href="tel:519-824-4120;56354" target="_blank">519-824-4120 Ext. 56354</a> | <a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a></span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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@UofGCCS on Instagram, Twitter and Facebook</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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