Microsoft’s New Security Server.
ISA 2000 is an application-level firewall with data-aware filtering capabilities as well as IP packet filtering functionality. To accelerate Web access ISA caches both inbound and outbound Web traffic, which means the server could be used to speed outbound Web access or as a front end to Web server farm to help offload traffic. ISA supports the Cache Array Routing Protocol (CARP) so the product can be scaled to fit larger traffic requirements.