[OpenSIPS-Users] Topology_hiding took down my carrier's switch

[Bogdan-Andrei Iancu]

In such cases, just change the TH prefix, to avoid confusion between the 
instances:
https://opensips.org/html/docs/modules/3.6.x/topology_hiding.html#param_th_callid_prefix

Regards

Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
   https://www.opensips-solutions.com
   https://www.siphub.com

On 17.07.2025 19:53, Federico Alves wrote:
> What happens is rhis: everybody uses the topplogy hiding module with 
> the default encryption password. If found that 2 opensips boxes where 
> the source does topology hiding, cannot talk to the second box if both 
> boxes have the same encryption password. The second box will decode 
> the call ID and respond using the first box client-side call ID.  The 
> whole SIP protocol breaks down. I took down the largest hosted switch 
> provider in the US.
> Please let me know if you have any other questions,  via private email.
>
> On Thu, Jul 17, 2025, 5:53 PM Bogdan-Andrei Iancu 
> <bogdan at opensips.org> wrote:
>
>     Hi,
>
>     The only thing you can do is (1) ask the carrier for an example of
>     such
>     bogus dialog and (2) investigate the SIP traffic to be sure that
>     the BYE
>     exchange with the carrier was correctly done...
>
>     Regards,
>
>     Bogdan-Andrei Iancu
>
>     OpenSIPS Founder and Developer
>     https://www.opensips-solutions.com
>     https://www.siphub.com
>
>     On 27.06.2025 00:57, Federico Alves wrote:
>     > So far my engineers use topology_hiding(), and the CallID from the
>     > client was passing forward to the carrrier. So we switched to
>     > topology_hiding("C") and worked as expected but the carrier's
>     switch
>     > collapsed after a while. They say that we leave many dialogs
>     open thar
>     > never close. Other than that, th3 calls work fine for us.
>     > What are my engineers doing wrong?
>     >
>     > _______________________________________________
>     > Users mailing list
>     > Users at lists.opensips.org
>     > http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
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