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Creating firewalld Rules

In this lab, we will be installing firewalld and creating firewall rules to permit HTTP and HTTPS traffic in the default zone. Then, we'll check to make sure the rules have applied.

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Path Info

Level
Clock icon Beginner
Duration
Clock icon 30m
Published
Clock icon Apr 15, 2019

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Table of Contents

  1. Challenge

    Install firewalld.

    To install firewalld, run the following command: - sudo apt-get install firewalld (Note: If you get a lock message, just wait 1-2 minutes and try again):

  2. Challenge

    Identify the default zone of firewalld.

    Use the following command to identify which zone is the default zone.

    sudo firewall-cmd --get-default-zone

  3. Challenge

    Create firewall rules.

    1. These rules need to take effect immediately without restarting the firewalld service, as well as survive a reboot. This means we must enter two rules for each protocol: one with the --permanent flag, and one without.

    Enter:

        sudo firewall-cmd --zone=public --add-service=http --permanent  
    sudo firewall-cmd --zone=public --add-service=http  
    sudo firewall-cmd --zone=public --add-service=https --permanent  
    sudo firewall-cmd --zone=public --add-service=https
    1. Check to make sure http and https have been added, run:
      sudo firewall-cmd --list-services
      • You should see http and https listed.
A Cloud Guru - Labs - Creating firewalld Rules
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A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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