[Winpcap-users] Lost packets on load

[Pelles, Noam]

Hi,

I am writing a network sniffer that uses WinPCap on Win 2000\2003
servers.
I have a strange problem which bothers me :

I am filtering packets according to their IP's and using more than one
client for that.
When I decrease network load ( sending packets which are NOT in one of
my filters - I.e not meant to be captured)
I start loosing packets that should be captured.

The lost of packets STOP when I open the Packetyzer  application ( which
also uses WinPCap).
The CPU usage of my application decrease dramatically , but it is no
longer loose packets !! ( even if the Packetyzer does not capture
packets at all..).
I have tried to download the source code of packetyzer , but could not
succeed ( any one have this source ??).

Does any one know what can cause this behavior ? what settings can
effect other application that uses WinPCap( beside mode) ?
Any one familiar with settings that can cause this problem ??

Thanks







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