Install Iptables Firewall in Redhat / CentOS Linux

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To install iptables firewall on Redhat or CentOS Linux, you need to use the following steps:

  1. Install iptables package:
$ sudo yum install iptables-services
  1. Enable iptables service at boot time:
$ sudo systemctl enable iptables
  1. Start iptables service:
$ sudo systemctl start iptables
  1. Configure iptables rules: The iptables firewall rules can be set using the iptables command. You can use the following commands to configure the firewall rules:
# To list the existing iptables rules:
$ sudo iptables -L

# To add a new rule to allow incoming ssh traffic:
$ sudo iptables -A INPUT -p tcp --dport 22 -j ACCEPT

# To save the iptables rules:
$ sudo service iptables save

  1. Restart iptables service after saving the rules:
$ sudo systemctl restart iptables

Note: You can also use other firewall management tools such as firewalld, UFW, etc., depending on your Linux distribution.

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