How do I set up a firewall with iptables on Arch Linux?

Setting up a firewall with iptables on Arch Linux is a relatively simple process. This tutorial will walk you through the steps of installing, configuring, and adding rules to the configuration file. Once the configuration file is loaded and saved, you can test the firewall to make sure it is working properly.

Install Iptables

The first step is to install iptables on your Arch Linux system. To do this, open a terminal window and type the following command:

This will install the iptables package on your system. Once the installation is complete, you can move on to the next step.

Configure Iptables

The next step is to configure iptables. To do this, open a terminal window and type the following command:

This will flush any existing rules in the iptables configuration file. Once the configuration is complete, you can move on to the next step.

Add Rules to the Configuration File

The next step is to add rules to the configuration file. To do this, open a terminal window and type the following command:

This will add a rule to the configuration file that will allow incoming traffic on port 80 (HTTP). You can add additional rules as needed. Once you have added all the rules you need, you can move on to the next step.

Load the Configuration File

The next step is to load the configuration file. To do this, open a terminal window and type the following command:

This will load the configuration file into the iptables system. Once the configuration file is loaded, you can move on to the next step.

Save the Configuration File

The next step is to save the configuration file. To do this, open a terminal window and type the following command:

This will save the configuration file to the iptables system. Once the configuration file is saved, you can move on to the next step.

Test the Firewall

The final step is to test the firewall. To do this, open a terminal window and type the following command:

This will list all the rules in the iptables configuration file. If the rules are correct, the firewall should be working properly. If not, you may need to adjust the rules or add additional rules.

Useful Links

• Iptables - ArchWiki
• How To Set Up a Firewall Using Iptables on Ubuntu 14.04
• Linux Iptables Firewall Configuration Tutorial