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If you are still using CentOS 7.9, it's time to convert to Alma 8 with the free centos2alma tool by Plesk or Plesk Migrator. Please let us know your experiences or concerns in this thread: CentOS2Alma discussion
In all honesty, you should simply block specific ports for the sake of security.
For instance, if you are the sysadmin and the only one required to access SSH, then use Plesk Firewall Extension to allow you access and block ALL OTHERS.
For instance, if you see any (really) suspicious activity in Fail2Ban, then permanently block the offending IPs - not via Fail2Ban, but with the Plesk Firewall AND by means of Nginx or Apache blacklist AND by means of the hosts.deny file.
It is essential that you block any offending traffic, originating from a repetitively offending IP, on ALL server levels ...... and that you ban them longer as the number of offending requests (from an offending IP) increase - in the long run, you will ban a considerable number of IPs permanently : that is good!