@muffinpry 

Can you expand on your question. Note that 21.04 is no longer supported

https://docs.centreon.com/docs/releases/lifecycle/

for the CA’s. you can see your current list with:

trust list

Hi,

I have several certificates of authority so I would like to know if centreon was able to read a bundle of certificates of authority.

Sorry, i didn’t know about the lifecycle of this version.

OK, but does putting authority certificates in the trust list make it possible to switch from the old certificate to a new one when the old one has expired?

I see, you can look into 

https://docs.centreon.com/pp/integrations/plugin-packs/procedures/applications-protocol-x509/

About the CA, the CA’s have a way to handling their valid certificate when any other cert falls under them.

The file /etc/ssl/certs/ca-bundle.crt contains all the CAs known and trusted to my system and centreon is configured to use this file.

I add a new CA to this file, then I change the certificate used by centreon to a certificate issued by the new CA, and the pollers on centreon stop updating and I get TLS errors.

That’s why I asked if centreon was able to read a bundle of CAs.