HTTP header | X-Forwarded-Host

The HTTP X-Forwarded-Host header is a request-type header de-facto standard header. This header is used to identify the original request made by the client. Because the hostnames and the ports differ in the reverse proxies that time this header took the leade and identify the original request. This header can also be used for debugging, creating location-based content. So this header kept the privacy of the client. The root version of this header is HTTP Forwarded.

Syntax:

X-Forwarded-Host: <host>

Directives: This header accepts a single directive as mentioned above and described below:

  • <host>: This directive holds the domain name of the forwrded server.

Below examples illustrate the HTTP X-Forwarded-Host header:
Examples:

  • In this example visited site was forwarded from the mentioned host website.
    X-Forwarded-Host: www.example-cdn.com
  • In this example forwarded host is geeksforgeeks cdn page.
    X-Forwarded-Host: www.cdn.geeksforgeeks.org

To check the X-Forwarded-Host in action go to Inspect Element -> Network check the request header for X-Forwarded-Host like below.

Supported Browsers: The browsers are compatible with the HTTP X-Forwarded-Host header is unknown till now.

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