If you want to block a complete IP range in CSF firewall, please follow these steps:
Let’s say you want to block following IP range:
[alert style=orange_a]58.253.xxx.xxx[/alert]
Step 1:
Login in root WHM.
Step 2:
Navigate to: WHM >> Plugins >> ConfigServer Security&Firewall
Step 3:
Block following IP using Quick Deny box.
[alert style=green_a]58.253.0.0/16[/alert]
Done!!!
You may need to restart CSF firewall after adding / removing IPs.
You can also block from SSH using following SSH command:
[alert style=green_a]csf -d 58.253.0.0/16[/alert]
Quick Note
To block 111.xxx.xxx.xxx range, use following rule
[alert style=green_a]111.0.0.0/8[/alert]
To block 111.111.xxx.xxx range, use following rule
[alert style=green_a]111.111.0.0/16[/alert]
To block 111.111.111.xxx range, use following rule
[alert style=green_a]111.111.111.0/24[/alert]
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