Hello,

the topology hiding is applied to both sides, so the modules not care. You can 
control execution with parameters and also some event route, depending on the 
module and Kamailio version.
Just note if you want the headers to really removed from the message, consider 
using topos with a SQL DB or redis.

Cheers,

Henning

--
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://gilawa.com<https://gilawa.com/>

From: Anthony Blandin <[email protected]>
Sent: Thursday, September 1, 2022 11:42 AM
To: Henning Westerholt <[email protected]>; Kamailio (SER) - Users Mailing List 
<[email protected]>
Subject: RE: How to hide Via and Record-Route header to external network and 
restore them to internal network?

Thanks Henning.
I will try it.
How topoh determines that it is a SIP message to be sent outside my network or 
not?

Anthony
________________________________
De : Henning Westerholt <[email protected]<mailto:[email protected]>>
Envoyé : jeudi 1 septembre 2022 11:16
À : Anthony Blandin 
<[email protected]<mailto:[email protected]>>; Kamailio 
(SER) - Users Mailing List 
<[email protected]<mailto:[email protected]>>
Objet : RE: How to hide Via and Record-Route header to external network and 
restore them to internal network?

Vous ne recevez pas souvent de courriers de la part de 
[email protected]<mailto:[email protected]>. Découvrez pourquoi cela est 
important<https://aka.ms/LearnAboutSenderIdentification>

Hi Anthony,



the restore happens internally and in the configuration you are able to access 
the headers, this is transparent for you.

Just give it a try in your lab, you can easily see it on the network.



Cheers,



Henning



--

Henning Westerholt - https://skalatan.de/blog/

Kamailio services - https://gilawa.com<https://gilawa.com/>



From: Anthony Blandin 
<[email protected]<mailto:[email protected]>>
Sent: Thursday, September 1, 2022 11:08 AM
To: Henning Westerholt <[email protected]<mailto:[email protected]>>; Kamailio 
(SER) - Users Mailing List 
<[email protected]<mailto:[email protected]>>
Subject: RE: How to hide Via and Record-Route header to external network and 
restore them to internal network?



Hi Henning,



Yes, I looked to topoh to hide topology but I didn't find a way to restore back 
the Via and Record-Route headers when I get replies from the external network.

Regards,



Anthony

________________________________

De : Henning Westerholt <[email protected]<mailto:[email protected]>>
Envoyé : jeudi 1 septembre 2022 11:01
À : Kamailio (SER) - Users Mailing List 
<[email protected]<mailto:[email protected]>>
Cc : Anthony Blandin 
<[email protected]<mailto:[email protected]>>
Objet : RE: How to hide Via and Record-Route header to external network and 
restore them to internal network?



Vous ne recevez pas souvent de courriers de la part de 
[email protected]<mailto:[email protected]>. Découvrez pourquoi cela est 
important<https://aka.ms/LearnAboutSenderIdentification>

Hello,



already investigated the topology hiding modules (topos, topoh)? They might be 
not doing exactly what you are describing, but usually are used for this kind 
of scenarios.



Cheers,



Henning



--

Henning Westerholt - https://skalatan.de/blog/

Kamailio services - https://gilawa.com<https://gilawa.com/>



From: sr-users 
<[email protected]<mailto:[email protected]>>
 On Behalf Of Anthony Blandin
Sent: Thursday, September 1, 2022 10:58 AM
To: [email protected]<mailto:[email protected]>
Subject: [SR-Users] How to hide Via and Record-Route header to external network 
and restore them to internal network?



Hi Community,



I have set up a SBC with Kamailio.

I am testing voice call from external network to my network and voice call from 
my network to external network.

When I send SIP messages to external network, I want to hide Via and 
Record-Route headers but when I receive replies from the external network I 
want to restore these Via and Record-Route headers to my network.

How to store and restore these headers in Kamailio configuration ?

Could you help on this?

Thanks



Anthony Blandin


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