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Requestheader Set X-Forwarded-Proto Apache | Guide

When it comes to server-client communication, understanding the protocol used by the client is key to ensuring secure connections.

However, server access logs may not offer this information, leading to potential security risks. Today, we are going to take a look at the importance of the X-Forwarded-Proto (XFP) header.

We will also look at how to use it in Apache to identify the protocol used between clients and our load balancer.

The X-Forwarded-Proto header helps identify the protocol used by the client to connect to our proxy or load balancer.

This information helps web servers determine the correct security measures and handle HTTPS redirects accurately.

How to Set X-Forwarded-Proto Header in Apache

1. First, we have to enable the mod_headers module by running this command:

   sudo a2enmod headers
2. Next, we must open our Apache configuration file and add the following line to set the X-Forwarded-Proto header:

   RequestHeader setifempty X-Forwarded-Proto "https"
3. Finally, it is time to save the configuration file and restart Apache for the changes to take effect.

Our experts would like to point out that the X-Forwarded-Proto header is typically handled by reverse proxies or load balancers when forwarding requests to the Apache server.

Furthermore, if our Apache server is behind a load balancer or acting as a reverse proxy, we do not have to set the X-Forwarded-Proto header in Apache. In such cases, the header will be automatically populated by the upstream server.

Let us know in the comments if you need more help with setting the X-Forwarded-Proto header in Apache

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Conclusion

In brief, our Support Techs demonstrated how to set the X-Forwarded-Proto header in Apache.