IP blacklist functionality for PHP firewall is controlled through single domain page on "Firewall" tab. 

There are four formats of IPs that we support:
 - Single IP address: 127.0.0.1
 - Wildcard: 127.0.0.*
 - IP subnet: 127.0.0.0/24
 - IP range: 127.0.0.0-127.0.0.255

Each rule should be entered in separated line.

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