Hi,
It’s a premium feature only (Access Control).
If you want to blacklist in the free version, you can still use the .htninja user configuration script: Check this post for more details (scroll down to “ALLOW / BLOCK”).
… I understand that in free a blocked rule won’t report log, in premium version the blocked do report it firewall log?
Yes, in the WP+ there’s an “Access Control” section when you can block an IP address and ask the firewall to write the event to the log.
In the WP, you need to use the .htninja, but it does not write to the log.