ISA Server 2004 was free on the 8th September 2004. ISA 2004 set up multi-networking support, incorporated virtual private networking design, extensible user and verification models, Application-Layer Firewall sustain, support for the H.323 protocol,Active Directory incorporation, SecureNAT, Secure Server Publishing, and improved reporting and management features. The rules based design was also significantly simplify over ISA 2000 version.
ISA Server 2004 Enterprise Edition incorporated array support, integrated Network Load Balancing (NLB), and Cache Array Routing Protocol (CARP). One of the core ability of ISA Server 2004 was its ability to steadily publish Web servers. For illustration, some association use ISA Server 2004 to publish their replace services (e.g., OWA, RPC over HTTP, ActiveSync, OMA). Using the Forms-based Authentication (FBA) verification type, ISA Server can be used to pre-authenticate web clients so that travel from unauthenticate clients to published clients is not allowable.
Microsoft Internet Security and Acceleration Server 2004 is accessible in two version, Standard and Enterprise. Enterprise Edition hold features enabling policies to be configured on an array level, before on individual ISA Servers, and load-balancing crossways multiple ISA Servers. every edition of ISA Server is licensed per processor (the version included in Windows miniature Business Server 2000/3 best includes licensing for 2 processors), and necessitate Windows Server 2003 Standard (32 bit) or Enterprise (32 bit) Edition server on which to run.Appliance hardware controling Windows 2003Appliance Edition and ISA Server Standard Edition is accessible from a selection of Microsoft Partners.