Featured resource
2025 Tech Upskilling Playbook
Tech Upskilling Playbook

Build future-ready tech teams and hit key business milestones with seven proven plays from industry leaders.

Check it out
  • Lab
    • Libraries: If you want this lab, consider one of these libraries.
    • Cloud
    • Security
Google Cloud Platform icon
Labs

Protecting Your System via `firewalld` in SUSE Linux Enterprise

In this hands-on lab, we will work with firewalld via YaST to enable the firewall as well as allow some ports. This is a fundamental process for any administrator and something that should be considered a basic task.

Google Cloud Platform icon
Lab platform
Lab Info
Level
Beginner
Last updated
Sep 13, 2025
Duration
30m

Contact sales

By filling out this form and clicking submit, you acknowledge our privacy policy.
Table of Contents
  1. Challenge

    Verify the Status of the Firewall on the Affected System
    1. Check iptables:

      sudo iptables -S
      
    2. Verify the rules are blank.

  2. Challenge

    Use YaST to Enable the Firewall, Move the Interface, and Allow the Appropriate Services
    1. Open YaST:

      sudo yast
      
    2. Under Security and Users > Firewall > Start-Up, set the current status to be start, and after reboot to start.

    3. Go to Interfaces, and move the eth0 interface to the public zone.

    4. Configure the public zone to add HTTP, and confirm that at least HTTP and SSH are allowed

    5. Save the configuration and exit YaST.

  3. Challenge

    Verify That the Firewall Is Set Correctly
    1. Check iptables:

      sudo iptables -S
      
    2. Near the end of the listing, you should see the rules for:

      -A IN_public_allow -p tcp -m tcp --dport 22 -m conntrack --ctstate NEW -j ACCEPT
      -A IN_public_allow -p tcp -m tcp --dport 80 -m conntrack --ctstate NEW -j ACCEPT
      
About the author

Pluralsight Skills gives leaders confidence they have the skills needed to execute technology strategy. Technology teams can benchmark expertise across roles, speed up release cycles and build reliable, secure products. By leveraging our expert content, skill assessments and one-of-a-kind analytics, keep up with the pace of change, put the right people on the right projects and boost productivity. It's the most effective path to developing tech skills at scale.

Real skill practice before real-world application

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

Learn by doing

Engage hands-on with the tools and technologies you’re learning. You pick the skill, we provide the credentials and environment.

Follow your guide

All labs have detailed instructions and objectives, guiding you through the learning process and ensuring you understand every step.

Turn time into mastery

On average, you retain 75% more of your learning if you take time to practice. Hands-on labs set you up for success to make those skills stick.

Get started with Pluralsight