Aaron Tiensivu's Blog

Very interesting insight into possible network stalls and slow file copies problems with Vista as a SMB file host.

SYMPTOMS
You cannot access a shared network resource that is hosted by a Windows Vista-based computer if one of the following conditions is true:

1. The size of the server message block (SMB) request packet exceeds the maximum transmission unit (MTU) size of the requesting device.
2. The size of the SMB request packet exceeds the MTU size of the router that connects the requesting device with the server.

CAUSE
This problem occurs because the server does not respond to an SMB request if the SMB request packet is fragmented. The SMB request packet is fragmented when its size exceeds the size of the MTU.

A hotfix is available for this.

I try to avoid using FPSE whenever possible, but if you absolutely need them, you can grab a beta version updated for Vista and Longhorn here.

Yesterday was another big release day.

Forefront Client Security Evaluation Edition
System Center Essentials 2007 Evaluation Edition
ISA Server 2004 Enterprise Edition Service Pack 3
ISA Server 2004 Standard Edition Service Pack 3

A personal sidenote: I've been using FCS Beta on my home/work machines and it is a really nice product. I love the fact that the virus updates come down with WSUS and that it integrates nicely with Windows Defender. You don't absolutely have to be on the domain network to receive virus updates unlike some other products.