For all those who have separate Remote Desktop Web Farms and Gateway Farms, why not use KEMP's LoadMaster to load balance both services over a single Virtual Service (IP Address). This can be easily achieved by using Sub interfaces.

Some important info before we start, Before Server 2012, the RD Gateway used a single HTTP Channel. Post Server 2012, the RD Gateway uses two channels (one for Input & one for Output). This means that these channels need to be routed through the same RD Gateway Server. You will need to use a Load balancing mechanism that supports IP affinity, Cookie-based affinity, or SSL ID-based affinity. RD Gateway now uses a new method based on two HTTP channels. Freek Berson RDS MVP has published a great article that discusses the use of KEMP's Azure VLM to Load Balance RDS in a Laas environment.  Please see the following link: http://kemptechnologies.com/blog/load-balancing-remote-desktop-services-web-access-gateway-with-kemp-load-master-for-azure/#!

Lab Configuration

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Getting Started:

Ensure you import you external certificate into the LoadMaster.

Create your Virtual Service.

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Create two Sub interfaces, one for RDS Web Services and one for RDS Gateway Services

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Once you have added your first Sub interface, the option to add a real server disappears. Add the second Sub interface.

Configure both Services to use HTTPS (443)

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You will need to make sure that the RD Gateway is configured for IP affinity or cookie based affinity to support the two HTTP Channels.

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Once complete you should see both services up:

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There you have it, RD Gateway Server and RDWeb Services load balanced using Sub interfaces on KEMP.

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