Block ip address of spammers with iptables under Linux

Q. How do I block ip address of spammers with iptables based firewall under CentOS Linux 5?

A. You can simply block IP address of spammers by editing /etc/sysconfig/iptables file under:

a) CentOS Linux
b) Fedora Linux
c) RHEL 4.x/5.x etc

Open file /etc/sysconfig/iptables:
# vi /etc/sysconfig/iptables
Append ip address of spammers as follows:
-A RH-Firewall-1-INPUT -s SPAMMER-IP -j DROP
-A RH-Firewall-1-INPUT -s SPAMMER-SUBNET-BLOCK -j DROP

Save and close the file. Just restart the firewall:
# /etc/init.d/iptables restart

You can also create a small shell script to block lots of IP address at a time.

Posted by: SXI ADMIN

The author is the creator of SXI LLC and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

Total
0
Shares
Leave a Reply

Your email address will not be published. Required fields are marked *

Previous Post

How to Make Website WCAG Compliant?

Next Post

Link download Kali Linux 2020.1 (ISO + Torrent)

Related Posts