"For its part, Microsoft continues to make improvements to the way it barricades Windows, and this summer the software maker will be releasing a new version of its Internet Security and Acceleration (ISA) Server. Though the largest enterprise customers tend to use ISA as a proxy server to cache and filter Web content, it is indeed Microsoft's firewall product. Microsoft is punching up its upcoming version with some improvements in application-layer filtering and performance; it will also give ISA a more finely tuned ability to specify which traffic can enter a network. The software entered its first public beta in late January and is expected to become available midyear, Microsoft said.
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