For a long time, ISA and then TMG have been the go-to Microsoft Reverse Proxy solution for many applications, including Exchange Server. However, with no more development roadmap for TMG 2010 a lot of customers are looking out for an alternative solution that works well with Exchange Server 2013.
The Windows team have added an additional component called Application Request Routing (ARR, or as Greg the pirate says, ARR!) 2.5 to the Internet Information Service (IIS) role, which enables IIS to handle reverse proxy requests. By using the URL Rewrite Module and Application Request Routing you can implement complex and flexible load balancing and reverse proxy configurations.
There are three options when implementing this solution and each have their pro’s and con’s. Due to the size of this topic we have decided to break it down into a total of three articles for ease of reading. In this first post we will be covering;
- Installation Steps.
- Option 1 of implementing ARR as a Reverse Proxy solution for Exchange 2013 (this option is the simplest of the three configurations).
In future articles we would cover Options 2 & 3 and some troubleshooting steps. The troubleshooting steps would also help you to verify if you have implemented the Reverse Proxy solution correctly.
Read more at source: http://blogs.technet.com/b/exchange/archive/2013/07/19/reverse-proxy-for-exchange-server-2013-using-iis-arr-part-1.aspx