Q1. What is clickjacking?

Clickjacking, also known as a “UI redress attack”, is when an attacker uses multiple transparent or opaque layers to trick a user into clicking on a button or link to another page when they were intending to click on the top level page. Thus, the attacker is “hijacking” clicks meant for their page and routing them to another page, most likely owned by another application, domain, or both.

If you’re still not clear about this concept then watch the video below.

Q2. How to stop clickjacking in AEM through the Apache2 Server?

Q3. What is the syntax of this configuration?

Header set X-Frame-Options: “sameorigin”

1. Uncomment this setting and restart your Apache2 server. 
2. Copy and paste this setting in apache2.conf file, uncomment it, and restart your Apache server.

While learning how to secure apache from clickjacking, I copied and pasted this setting in apache2.conf file, uncommented it and restarted my Apache2 server.

Q6. How to enable Headers.mod in Apache2 server?

For enabling this module you have a headers.load file present in mods-available directory in your Apache2 server. In my case, it is present at /etc/apche2/mods-available. Just do one thing, create a softlink in your mods-enabled folder. If you are an Ubuntu user execute this command-

 ln -s /etc/apache2/mods-available/header.load /etc/apache2/mods-enabled/headers.load

After restarting the Apache2 server, just hit a non-cached page via Apache2 Server. Open debugger and check the response header. You will see X-Frame-Options header field as shown below.