Looking for a reverse proxy replacement now that Forefront
Threat Management Gateway (TMG) 2010 has been discontinued? Well, it is now
possible to add an optional component called IIS Application Request Routing
(ARR) 2.5 to the Internet Information Services (IIS) role. This component
enables IIS to handle reverse proxy requests, URL rewrites, and load balancing.
IIS ARR is supported on Server 2008, 2008
R2, and 2012. And it’s also supported On Windows 8, 7, and Vista with the Web
services features installed. So why is a reverse proxy required? Lync Server uses two websites to service
its web requests, one for the internal network and one for the external
network. The external website listens on port 4443, instead of on the standard
port 443. In order to do port translation a reverse proxy is required to translate between the two websites.
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