BIP KB:
How To Block IP Addresses Using IPtables
Article By samantha
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The following article describes various ways to block IPs using the built-in RedHat firewall, iptables. The following command will drop all incoming connections from IP xx.xx.xx.xx: |
iptables -I INPUT -s xx.xx.xx.xx -j DROP
To block a range, such as xx.xx.xx.* specify the CIDR block as follows:
iptables -I INPUT -s xx.xx.xx.0/24 -j DROP
If you wanted to later remove this entry you would replace the -I with -D as follows:
iptables -D INPUT -s xx.xx.xx.xx -j DROP
iptables -D INPUT -s xx.xx.xx.0/24 -j DROP
Tags: don't wait to educate, Linux, Firewall, how-to, iptables
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