Forum Discussion
How useful is SSL mirroring when clustering?
- Dec 06, 2022
Hi, Alex
Bugs apart (let's assume we live in a perfect world for a minute), I always like to activate mirroring when I know traffic is SSL-based, whether the F5 terminates SSL sessions or not.
The idea is precisely what you mentioned - making life easier for endpoints, who don't have to recreate all the SSL sessions in the event of a failover. If you don't have SSL termination, or if you do but re-encrypt traffic for the server-side, "endpoints" means client and server. You may not be worried with performance issues on the client machine, but tipically you want to take that load off your servers, even if it means putting a little extra load on the F5 machines.
About performance on the F5 itself, the only way to know if you are having a big impact is by monitoring. If your system is very underloaded, even when doing mirroring, I would say keep it that way. If you are near any limits (CPU or RAM), disabling mirroring might help if there are a big number of sessions.
/Mike
There is the way to verify the client certificate (and not only if the CA is trust) with LTM GUI ?
i am not aware of it.
- Dec 01, 2023
This document seems to be a good start: Extracting data from HTTP payload using iRules (f5.com)
Use the suggestions in this article and see if you can log the ID that's in the payload. When you succeed in logging the ID, it should be relatively ease to make a pool decision for it.
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