For the Curious ...

In my previous blog, where I mentioned how to use HA Proxy( http://haproxy.1wt.eu/ – Open source Load balancing Solution) based load balancer for Exchange 2010 ( Link to Post ), I had a few requests on how to do the SSL offloading as well. If you have followed that guide, you have your SSL certificates hosted on the Exchange Hub CAS servers. Microsoft does suggest to use the SSL on the boxes, but you can offload it as well, please remember that I am writing this for a generic https server and we will be using 2 open source products. We will use HA Proxy for the Load balancing and the Pound for the SSL offloading. Now, for this purposes, I have used a single box, but for production machines, you may want to make a HA Pair of Linux box, which I will cover in a different post. I have been running HA Proxy in the exchange environment and it is great, the only thing, I could ask for is source port based persistence . Anycase, back to the topic. Here is how the architecture will look lik...

Hi ... Sorry I have been away for some time doing some stuff, so I hadn't got a chance to update my blog. I thought I would share my recent experience of deploying an Open Source "Linux Load Balancer" (HA Proxy -  http://haproxy.1wt.eu/  ). This Load Balancer is amazing ... I have been able to do so much with it in the past, here is one of the very simple and effective solutions (Cost wise & Performance) that we gave to the client using this ... I worked with a friend M L N Rao , who was helping me out with the Exchange front of things. Please read on to see .... I have tried to explain how to do it as well as why ... let me know what you think in the comments ... So, here is what happened, Our Exchange Team deployed Microsoft Exchange Server 2010 at a clients location and decided to go with MS-NLB. The MS NLB (Network Load Balancer) is a Load Balancer for different Microsoft products like IIS Servers/ISA/TMG, etc but the truth be told more pain than good for ne...