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Block IPs via iptables

You will need to run these commands as 'root'.

This command blocks IP "123.123.123.123" at the firewall.

iptables -I INPUT -s 123.123.123.123 -j DROP

This command lists all the IPs currently blocked at the firewall

iptables -L INPUT -n --line-numbers

This command would remove line #3 from the firewall

iptables -D RH-Firewall-1-INPUT 3

This command saves the changes to the firewall

iptables-save

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