- Lab
-
Libraries: If you want this lab, consider one of these libraries.
- Cloud
- Security

Firewall Troubleshooting
In this learning activity, there is a fairly simple, but broken, firewall configuration. The firewall on `Server1` (10.0.1.10) should be configured to permit web requests from `Client1` (10.0.1.11). You will need to determine why the firewall isn't working as intended, and resolve the issue.

Lab Info
Table of Contents
-
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 10.0.1.10 from 10.0.1.11:$ curl -I 10.0.1.10
-
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 10.0.1.11 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=10.0.1.11 [root@$host ~]# firewall-cmd --reload
-
Challenge
Verify That the Problem Is Resolved
From
Client1
(10.0.1.11), run:curl -I 10.0.1.10
About the author
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.