[OpenSIPS-Users] is_from_gw() DNS Names

[Bogdan-Andrei Iancu]

Hi Mark,

You say the DNS is publishing only one IP for the domain, but one may 
change ? If you want, you can PM me the actual domain to see how the DNS 
records looks like.

Regards,

Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
   https://www.opensips-solutions.com
OpenSIPS eBootcamp
   https://www.opensips.org/Training/Bootcamp

On 2/22/22 12:31 PM, Mark Farmer wrote:
> Hi Bogdan
>
> The GW's have 2 CNAME records which I have no control over. DR has 
> entries like subdomain.example.com:5061 
> <http://subdomain.example.com:5061>
> I suspect the issue arises when the CNAMES swap around resulting in a 
> mismatch.
>
> Currently I am using this to identify the source of the message which 
> is probably not the best in terms of security.
>
> $avp(fd) = "subdomain.example.com <http://subdomain.example.com>";
> if($(ct.fields(uri){s.index, $avp(fd)}) != NULL)
>
> Perhaps there is a better way?
>
> Best regards
> Mark.
>
>
>
> On Tue, 22 Feb 2022 at 08:56, Bogdan-Andrei Iancu <bogdan at opensips.org 
> <mailto:bogdan at opensips.org>> wrote:
>
>     Hi Mark,
>
>     If a gw is defined via FQDN, that will by DNS resolved (NAPTR,
>     SRV, A records) when DB data is (re)loaded by DR module, and used
>     later for such checks. All found IPs (from DNS) will be stored on
>     the GW.
>
>     How do you specify the GW address in DB and what kind of DNS
>     records do you have for it ?
>
>     Best regards,
>
>     Bogdan-Andrei Iancu
>
>     OpenSIPS Founder and Developer
>        https://www.opensips-solutions.com  <https://www.opensips-solutions.com>
>     OpenSIPS eBootcamp
>        https://www.opensips.org/Training/Bootcamp  <https://www.opensips.org/Training/Bootcamp>
>
>     On 2/18/22 6:04 PM, Mark Farmer wrote:
>>     Hi everyone
>>
>>     I am using is_from_gw() to match against a group of gateways
>>     specified by DNS names which resolve to multiple IP addresses but
>>     it seems to be failing to match.
>>
>>     Is this supported functionality or do I need to do something else
>>     in this case?
>>
>>     Thanks and regards
>>     Mark.
>>
>>
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>>     Users at lists.opensips.org  <mailto:Users at lists.opensips.org>
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>
>
>
> -- 
> Mark Farmer
> farmorg at gmail.com <mailto:farmorg at gmail.com>

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