[OpenSIPS-Users] is_from_gw() DNS Names

[Ovidiu Sas]

With MS, you can authenticate based on $tls_peer_subject_cn. This
works ok with openssl but not with wolfssl. When wolfssl is using
session tickets to establish new connections, the $tls_peer_subject_cn
is not populated.
Another alternative is to perform a lookup for each request received
over a tls connection using the ip.resolve transformation and enable
dbs_cache to help a little bit. It's messy but it works.

-ovidiu

On Fri, Feb 25, 2022 at 6:51 AM Mark Farmer <farmorg at gmail.com> wrote:
>
> Thanks Bogdan
>
> It's no secret really, I was just speaking generically.
> They are the MS Direct Routing domains, EG sip.pstnhub.microsoft.com
>
> Mark.
>
>
>
> On Tue, 22 Feb 2022 at 12:50, Bogdan-Andrei Iancu <bogdan at opensips.org> wrote:
>>
>> 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
>> 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.
>>
>> $avp(fd) = "subdomain.example.com";
>> if($(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> 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
>>> OpenSIPS eBootcamp
>>>   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.
>>>
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at lists.opensips.org
>>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>>
>>>
>>
>>
>> --
>> Mark Farmer
>> farmorg at gmail.com
>>
>>
>
>
> --
> Mark Farmer
> farmorg at gmail.com
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users



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