According to sk102527, in versions R75, R76, R76SP, R76SP.10, R76SP.10_VSLS, R76SP.20, R76SP.30, R76SP.40, R77, R77.10, R77.20, R77.30 the portal http server logs are not rotated. This sk originally is from 2014.
Well, we have 2019 (Yes, that's 5 years!) and R80.10 T142 here and this is still not solved. Fixing that is a totally low hangig fruit. Not fixing is means manual effort to find and fix that in all checkpoint installations worldwide. Proactive is different..
Checkpoint does not seem to be able to solve their quality problems finally.