iptables is a powerful firewall application that operates at the network packet level. It allows the system administrator to configure rules and filters to control network traffic on a Linux system.
iptables comes pre-installed on many Linux distributions, including CentOS 7. However, if it is not present on your system, you can install it by following these steps:
Open a terminal on your CentOS 7 system.
Type the following command to install iptables:
yum install iptables
Press Enter to begin the installation process.
Wait for the installation to complete.
Once the installation is finished, you can start using iptables to configure your firewall rules and filters. It is recommended to have a good understanding of network protocols and security practices before making any changes to your system's firewall configuration.
You can find more information about iptables and its usage in the official documentation here.
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