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About Internet Security and Acceleration Server

Internet Security and Acceleration Server 2004/2006 SDK

Microsoft® Internet Security and Acceleration (ISA) Server integrates firewall and cache features to secure networks and improve their performance. ISA Server is an extensible platform that provides security, hardware redundancy and load balancing, efficient use of network resources by means of sophisticated caching mechanisms, and administration tools. ISA Server 2006 and ISA Server 2004 Enterprise Edition run on computers that use Microsoft Windows® Server 2003, and rely on the features and functionality of this operating system. ISA Server 2004 Standard Edition can also run on computers that use an operating system from the Windows 2000 Server family.

ISA Server consists of several technologies:

Microsoft Firewall service.
A Web proxy.
Secure network address translation (SecureNAT).
Advanced caching capabilities, including RAM caching and use of the Cache Array Routing Protocol (CARP).
Dynamic Internet Protocol (IP) packet filtering.
Virtual private networking (VPN).
Alerting.

For more information, see the ISA Server product documentation.

Two editions of ISA Server are available: ISA Server Standard Edition and ISA Server Enterprise Edition. Initially, an organization may decide to purchase ISA Server Standard Edition. As the organization grows, and the need to communicate with the Internet increases, consider upgrading from the ISA Server Standard Edition to the Enterprise Edition. The differences between the editions are documented in Enterprise Edition and Standard Edition.

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