There are a number of prerequisites that should be addressed prior to installing a Horizon Security Server:

• At least one configured Horizon Connection Server with a license key must be installed.
• A dedicated 64-bit Windows 2008 R2 SP1, 2012 R2, or 2016 server is needed to host the Horizon Security Server role.
• You must have two network adapters and a static IP address for each on the Security Server host (one adapter will be public facing, the other private facing).
• The Security Server host should be able to resolve the FQDN of the Connection Server it will pair with, either using DNS or the local hosts file.
• You must have a valid Horizon Connection Server pairing password is needed.
• Firewall access is required between the Horizon Security Server and the necessary Horizon components on the private network.
• Firewall access between the Internet and the Horizon Security Server.
• A resolvable public URL that will be used for accessing the Horizon Security Server.
• You must have local administrator access on the host server.

In addition to the items described in Chapter 1, VMware Horizon Infrastructure Overview, the following items should be prepared in advance of the installation.