CommonName Usage in Certificate for URL Filtering

Hello Devs,

I heard that other Firewalls use for URL Filtering in https traffic the commonName of the certificate itself which allows Filtering without breaking the https encryption.
With the commonName (CN) in the certificate the website can be categorized.

Is this a possibilty in IPFire too?
I never really got he URL Filtering working and I thought its due to the encyrption and/or allowing https traffic and/or no proxy usage, but this method seems to work with everything of that off.

Thank you,
great product :slight_smile:
Florom