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Old 2nd June 2008
J65nko J65nko is offline
Join Date: May 2008
Location: Budel - the Netherlands
Posts: 3,994

If the problem can be solved by disabling TCP windows scaling as OP mentioned in the problem is either caused by ipf or an intermediate router/firewall not understand this scaling mechanism.

Microsoft Vista has this scaling mechanism enabled by default. That is why many people experience these kind of problems only after the launch of Vista.

For some details about TCP window scaling, see
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump
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