Recommendations for reverse proxy configuration

Here are some general configuration recommendations for setting up a reverse proxy.

Preserving HTTP 1.1 Host: headers
HTTP 1.1 requests often include a Host: header, which contains the hostname from the client request. This is because a server may use a single IP address or interface to accept requests for multiple DNS hostnames.
Enabling the Apache ProxyPreserveHost directive
The ProxyPreserveHost directive is used to instruct Apache mod_proxy, when acting as a reverse proxy, to preserve and retain the original Host: header from the client browser when constructing the proxied request to send to the target server.

Installation Guide · Version 1.2.2 · Revision B · October 2016

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