Allow WHM/cPanel ssh logins from specific IP addresses using iptables



For some reason the hosts.allow and hosts.deny files don’t seem to work on cPanel.  One of the alternative methods to limit ssh logins to specific addresses is to use iptables.

Allow access from specific IP addresses. 

Replace 192.168.1.0/24 and 192.168.0.0/24 with your addresses.  You can add more addresses using the “,”.  Also if your ssh port is not the default port, be sure to change it.

iptables -A INPUT -s 192.168.1.0/24,192.168.0.0/24 -p tcp --dport 22 -j ACCEPT

Reject access from everywhere else

iptables -A INPUT -s 0.0.0.0/0 -p tcp --dport 22 -j REJECT

You can see your rules with

 iptables -L --line-numbers

If you need to add another rule after the fact, you’ll need to make sure that it is above the REJECT rule. you can use the “-I” to insert it between rules.

Example: inserts rule as the second rule in the INPUT chain

iptables -I INPUT 2 -s 192.168.42.0/24 -p tcp --dport 22 -j ACCEPT

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