Networking with Windows Server 2008

 We would like to make sure that the community is aware and ready for the changes that WS08 will incorporate. For example, the networking stack in WS08 has been completely re-written (as compared with WS03 and XP). The new features that may pose potential compatibility issues include: removed filter hooks, receive window auto tuning, dual IPv6 layer architecture for IPv6, compound TCP, ECN support, default strong host model, easier kernel mode programming, extensive protocol offload. Windows Server 2008 is the very first Microsoft server product to have the firewall ON by default. Applications that are not aware of this behavior may have Compatibility issues.