Websites on Plesk are inaccessible after Imunify360 ruleset update

Issue

• A Plesk server with a large number of customers is used.
• Plesk version 18.0.48 or newer is used.
• Once ModSecurity rules are updated, web services are down for a few (2-10) minutes.

Environment

• Plesk
• Imunify360
• ModSecurity

Solution

Disable updated until the bug is fixed on the Plesk side.

Cause

Since Plesk 18.0.48, configuration files are being fully rebuilt on each ModSecurity configuration update. It is now considered by Plesk developers as bug ID PPP-59153.

Useful links

https://docs.plesk.com/release-notes/obsidian/change-log/