Well, good question. The mechanism will perfectly work between the mid_registrar and the end-devices. But if the mid_registrar detects and remove a zombie contact, it may have to preform a de-registration (depending on the mid registrar mode) with the main registrar. That means an REGISTER generated by mid-registrar OpenSIPS - and if you do digest auth on the main registrar, this will fail :(

Regards,

Bogdan-Andrei Iancu

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

On 03.10.2024 16:20, M S wrote:
Hi Bogdan,
Thank you for your post and explanation, does this work the same with mid_registrar too, i.e. if a contact is marked with RTO is it discarded from mid_registrar location if it is zombie?

Thank you!

On Thu, Oct 3, 2024 at 1:04 PM Bogdan-Andrei Iancu <bog...@opensips.org> wrote:


    Here is a short post on how to improve your OpenSIPS registrar
    performance and also your user's experience in the same time.... by
    fighting the zombies.... the zombie registrations 🙂

    
https://blog.opensips.org/2024/10/03/how-to-eliminate-zombie-registrations-in-opensips/

    Enjoy,

-- Bogdan-Andrei Iancu

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


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