(ISAServer2006 is currently the most used ISA version in the enterprise. This version enhances the support for OWA publishing and multiple Web site publishing, and adds support for SharePoint Portal Server publishing; Single sign-on for all web services published by the web listener; added server farm function, which supports the formation of server clusters through multiple web servers to achieve load balancing, and this feature does not require Windows NLB or cluster support; enhanced d The /dos protection function greatly enhances the ability to prevent d/dos attacks. Let's take a look at how to build an experimental environment for ISAServer2006.)