!!! Overview
[{$pagename}] architectures is where all web requests are routed through the [Proxy Server].

Access to the back-end [HTTP]-Application servers can only be accessed via the [{$pagename}]. 

[{$pagename}] can provide a more universal integration with [HTTP] servers since the common standard protocol, HTTP, is used instead of vendor-specific application programming interfaces (APIs). 

[{$pagename}] acts as a contact point between the user's web [browser] and the [HTTP-Server] as a [Protected Resource].

The [{$pagename}] masks the protected web server by presenting different external [URLs] to the internal [URLs]. 

The [{$pagename}] becomes the communication point and can control access and carry out Single Sign-On operations. Ideally, it is not necessary to modify the protected application.

!! Advantages of [{$pagename}]
[{$pagename}] has several advantages:
* [{$pagename}] completely independent of the web servers, both technically and environmentally.
* Several [{$pagename}] implementations provide high availability and load balancing of the access points.
* Several [{$pagename}] implementations are able to consolidate WEB Server to appear as a single site.
** Applications served from two different WEB servers could appears as the same: willeke.com/cars and willeke.com/boats could be hosted on different servers.
* Several [{$pagename}] implementations allow administrative delegation so WEB Admins can alter their site configurations.
* Migration from one product to another is less impactful to the environment.
* No Agent installations or upgrades.

!! Drawbacks of [{$pagename}][1]
Nevertheless, this technology does have some drawbacks:
* The web application must be correctly written and contain clean URLs, and typically the URLs must be relative to the root of the website. 
* Some reverse proxies only modify the HTTP headers and are not able to modify the HTML content of the pages.
* The advent of AJAX technologies and URL and Javascript modifications make it difficult for reverse proxies to analyse page links and reconstruct external URLs.
* The web application should not contain absolute links to other internal applications which are also accessible behind a reverse proxy.

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
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* [#1] - [What is the Web SSO|http://www.evidian.com/products/web-sso/what-is-the-web-sso/|target='_blank'] - based on data observed:2015-05-18