[cisco-voip] SIP Domain substitution

[Lelio Fulgenzi]

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.

I’ve done some searching, and there’s talk of RR records, but we haven’t found much documentation.


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Lelio Fulgenzi, B.A. | Senior Analyst
Computing and Communications Services | University of Guelph
Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON | N1G 2W1
519-824-4120 Ext. 56354 | lelio at uoguelph.ca<mailto:lelio at uoguelph.ca>

www.uoguelph.ca/ccs<http://www.uoguelph.ca/ccs> | @UofGCCS on Instagram, Twitter and Facebook

[University of Guelph Cornerstone with Improve Life tagline]

From: Dave Goodwin <dave.goodwin at december.net>
Sent: Friday, October 4, 2019 12:09 PM
To: Lelio Fulgenzi <lelio at uoguelph.ca>
Cc: cisco-voip voyp list <cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] SIP Domain substitution

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.

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.

On Fri, Oct 4, 2019 at 11:10 AM Lelio Fulgenzi <lelio at uoguelph.ca<mailto:lelio at uoguelph.ca>> wrote:

Does SIP allow for domain name substitution?

By this I mean, instead of advertising or dialing coyote at phones.america.acmemanufacturing.com<mailto:coyote at phones.america.acmemanufacturing.com> I want to use coyote at zing.com<mailto:coyote at zing.com>

But I don’t want to have to reorganize and reprogram anything.

I just want the DNS to say, “hey, use this domain instead and try again.”
-sent from mobile device-

Lelio Fulgenzi, B.A. | Senior Analyst
Computing and Communications Services | University of Guelph
Room 037 Animal Science & Nutrition Bldg | 50 Stone Rd E | Guelph, ON | N1G 2W1
519-824-4120 Ext. 56354<tel:519-824-4120;56354> | lelio at uoguelph.ca<mailto:lelio at uoguelph.ca>

www.uoguelph.ca/ccs<http://www.uoguelph.ca/ccs> | @UofGCCS on Instagram, Twitter and Facebook

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