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Firewall Troubleshooting

In this learning activity, there is a fairly simple, but broken, firewall configuration. The firewall on `Server1` ( should be configured to permit web requests from `Client1` ( You will need to determine why the firewall isn't working as intended, and resolve the issue.

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Path Info

Clock icon Intermediate
Clock icon 30m
Clock icon Nov 14, 2018

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Table of Contents

  1. Challenge

    Verify That the Issue Exists

    Prior to beginning the troubleshooting, you should verify that the issue actually exists.

    Attempt to curl the headers for from

    $ curl -I

  2. Challenge

    Resolve the Problem by Creating a New Zone

    You can resolve this issue by creating a new zone, adding the http service to it, and designating as a source for the zone. Use these commands:

    [root@$host ~]# firewall-cmd --permanent --new-zone=api
    [root@$host ~]# firewall-cmd --reload
    [root@$host ~]# firewall-cmd --permanent --zone=api --add-service=http
    [root@$host ~]# firewall-cmd --permanent --zone=api --add-source=
    [root@$host ~]# firewall-cmd --reload
  3. Challenge

    Verify That the Problem Is Resolved

    From Client1 (, run:

    curl -I

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