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Internet Security and Acceleration (ISA) Server

Microsoft Internet Security and Acceleration (ISA) Server is an extensible, multilayer enterprise firewall and Web cache that helps provide secure, fast, and manageable Internet connectivity.

Essentials

Microsoft Internet Security and Acceleration Server: Home
Find out more about the Microsoft firewall and Web caching product, Microsoft Internet Security and Acceleration (ISA) Server.

Articles

Microsoft's Stellar ISA Server
See the new features and improvements in ISA, a standalone Internet Security product formerly called Proxy Server that serves the Internet firewall market.
Developing Application Filters
Follow the basic steps required to create an application filter for ISA.
ISA Administration Scripting
Extend ISA functionality using the ISA administration object model.
Developing Web (ISAPI) Filters for ISA
Develop and implement ISAPI filters, previously available only with Internet Information Services (IIS), for ISA.
Securing Web Services with ISA Server
Use ISA to handle the security in your Web service. Learn how to discern what the Web service allows callers to do, create a client application that will call Web Methods, and create an ISA extension to secure the Web service.