- Lab
- A Cloud Guru
Permitting and Blocking Traffic with the Firewall
In this hands-on lab, you will need to configure `Server1` (10.0.1.10) so that it only permits HTTP connections (port 80) from `Client1` (10.0.1.11).
Path Info
Table of Contents
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Challenge
Verify that a firewall is running.
You should already have iptables started and running. You can verify this with:
# systemctl status iptables -
Challenge
Verify that the host listening on port 80.
You'll want to verify that the host has a service listening on port 80. You can do so using the following command:
# ss -lntp | grep :80You should see that port 80 is listening for the httpd process.
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Challenge
Verify that port 80 is blocked, and add a rule to permit traffic coming from 10.0.1.11.
From
Client1(10.0.1.11), try tocurl10.0.1.10:[cloud_user@ip-10-0-1-11 ~]$ curl 10.0.1.10You'll need to add a rule to permit the traffic:
iptables -I INPUT -p tcp -s 10.0.1.11 --dport 80 -j ACCEPTTest from
Client1again, and also withClient2. IfClient1is successful andClient2isn't, save your existing chain with:[root@ip-10-0-1-10 ~]# service iptables save
What's a lab?
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.
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We will provide the credentials and environment necessary for you to practice right within your browser.
Guided walkthrough
Follow along with the author’s guided walkthrough and build something new in your provided environment!
Did you know?
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