Anilrgowda

There is an incompatibility between Microsoft Windows Vista and some network equipment. Equipment possibly affected includes: Routers, VPN Endpoints, and Firewalls that use Stateful Packet Inspection (SPI).
Among most commercial firewalls that utilize Stateful Packet Inspection, the OSU Fire Marshall is one that is affected by this issue.
The problem has to do with the TCP window resizing feature in Vista and Stateful Packet Inspection. Possible symptoms exhibited include:

• Web traffic works OK
• Email through client software sends but will not receive or times out when downloading messages (pop or Imap)
• Slow or no network file server access.
• Other random network timeouts or connectivity problems.

Early adopters of Vista on campus should check with their departmental network administrator before installing Vista to see if they might be affected.

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