How to configure firewall in Manjaro Linux?

Configuring a firewall in Manjaro Linux typically involves using ufw (Uncomplicated Firewall). Here's a step-by-step guide:

1. Install UFW: If it's not already installed, you can install it using pacman, the package manager for Manjaro:

   sudo pacman -S ufw
   

2. Enable UFW: After installation, enable the firewall:

   sudo ufw enable
   

3. Set Default Policies: Define the default policies for incoming and outgoing traffic. For a more secure setup, you might want to block all incoming traffic and allow all outgoing traffic:

   sudo ufw default deny incoming
   sudo ufw default allow outgoing
   

4. Allow Specific Services: If you need to allow certain services like SSH or HTTP, you can specify them:

   sudo ufw allow ssh
   sudo ufw allow http
   

5. Check the Status: To verify the current status of UFW and see which rules are active:

   sudo ufw status verbose
   

6. Delete Rules: If you need to remove a rule, you can do so by specifying the rule number from the status output:

   sudo ufw delete 1
   

For example, if you want to allow incoming traffic on port 8080 for a web server, you would use:

sudo ufw allow 8080/tcp

This setup ensures that your Manjaro Linux system is protected by a firewall that only allows necessary traffic, enhancing security.

If you're looking for cloud-based solutions to manage or enhance your firewall capabilities, consider services like Tencent Cloud's Anti-DDoS Pro, which offers advanced protection against distributed denial-of-service attacks, complementing your local firewall setup.