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Editorial Team
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Asked: 2026-05-16T06:30:57+00:00

In a situation where Apache is sitting behind a reverse proxy (such as Squid),

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In a situation where Apache is sitting behind a reverse proxy (such as Squid), the cgi environment variable REMOTE_ADDR gets the address of the proxy rather than the client.

However, the proxy will set a header called X-Forwarded-For to contain the original IP address of the client so that Apache can see it.

The question is, how do we get Apache to replace REMOTE_ADDR with the value in the X-Forwarded-For header so that all of the web applications will transparently see the correct address?

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1 Answer

  1. Editorial Team

    You can use mod_rpaf for that. http://stderr.net/apache/rpaf/

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