How To Set Up a Firewall with Awall on Alpine Linux

To set up a firewall with Awall on Alpine Linux, follow these steps:

1. Install Awall:

apk add awall

2. Create a configuration file for Awall. By default, Awall looks for a configuration file at /etc/awall/awall.conf. You can create the file using a text editor or use the awall-config utility to generate a sample configuration file:

awall-config create -d > /etc/awall/awall.conf

3. Edit the configuration file to specify the desired firewall rules. You can use the interface and rule directives to specify the interfaces and rules, respectively. For example:

interface eth0
    rule input
        accept
    rule output
        accept

This will allow all incoming and outgoing traffic on the eth0 interface.

4. Apply the configuration file by running the awall command:

awall apply

This will apply the firewall rules specified in the configuration file.

5. To make the firewall rules persistent across reboots, add the awall command to the /etc/local.d/ directory.

For example, create a file named awall.start.