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A reverse proxy is a proxy server that is installed on a server network or on network equipment. More at
Wikipedia
Proxy server - In computer networks, a proxy server is a server that acts as an intermediary for requests from clients seeking resources from other servers.
Apache HTTP Server may be extended with mod_proxy to be used as a reverse proxy; a caching reverse proxy server may be configured using the mod_cache module in conjunction with mod_proxy.
Apache Traffic Server - An open source, high-performance routing and caching server
Internet Information Services 7.0 with URL Rewrite v2 and Application Request Routing can act as Reverse Proxy.
LiteSpeed Web Server can be used as a transparent reverse proxy server running in front of any web server or application server that supports HTTP protocol.
Microsoft ISA Server - A commercial proxy, firewall and caching solution by Microsoft.
Novell Access Manager is a commercial security solution which includes a reverse proxy, a policy based access manager and SSL VPN. All components use a LDAP like directory or federation with Liberty and others.
Perlbal is a Perl-based reverse proxy load balancer and web server.
Pound, a lightweight open source reverse proxy.
Squid is a proxy server that may be installed in a reverse proxy configuration.
Stunnel can be used as a local SSL reverse proxy.
Sun Java System Web Server includes reverse proxy module with load balancing capabilities.
Varnish is a performance-focused open source reverse proxy. It has a policy configuration language to allow extension. It features ESI, SaintMode, DNS director and native support for In-line C.
WinGate supports reverse-proxying with SSL, authentication, and multiple virtual hosts.
Zeus is a product that can function as both a forward and reverse proxy, as well as content load balancer.
