Mod_proxy is a core module that redirects connections. It is a tool used for load balancing and it supports the Proxy settings (Forward and Reverse) in Apache server. Reverse proxy allows accessing of a webserver that is behind the firewall.Mod_proxy represents a collection of modules, each with a specific functionality. It holds several sub-modules like modproxyftp, modproxyhttp, modproxyconnect, modproxybalancer and so on.