If mod_proxy is installed, mod_rewrite can be used to force requests through the proxy mechanism to another server, or perhaps to another part of the same server. This technique is used for a wide variety of purposes, such as load balancing and server migration. In this chapter, I’ll cover the syntax involved in rewriting to a proxy and discuss the various intricacies of this technique.
Apache comes with several modules that allow you to run a proxy server. With Apache 1.3, the caching and proxying functions are combined in mod_proxy. In 2.0, these functions are split into several submodules. And in 2.2, the proxying functionality was overhauled ...
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