More problems with Windows 7 firewall

[David Aldrich <David.Aldrich () EMEA NEC COM>]

Hi

I wrote in a thread last week that we have a Windows 7 console application that communicates with an embedded processor 
card using UDP.  I have watched the communication flow using Wireshark and it looks fine.  I have set, what I believe 
to be, appropriate inbound and outbound rules for Windows 7 firewall.  On one PC the application runs fine, but on 
another PC inbound packets on one port are not reaching the application.

The weird thing is that on the failing PC, if I start a Wireshark capture on the interface, the inbound packets do 
reach my application.  As soon as I stop the capture the inbound packets fail to reach the application.

Please can anyone suggest why Wireshark is having this effect?

Best regards

David

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