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Implemting a packet filter for WinXP

I'd like to implement a packet filter for Windows XP.  I'd like my code to have access to both inbound and outbound traffic, including the ability to modify or drop packets.  For example, when a packet meeting certain criteria arrives, I'd like to be able to drop it, along with other packets from the same IP address.  I'd also like to be able to restrict outbound traffic through packet inspection.

I'm familiar with TPC/IP, how to decode packets, etc., so what I'm really looking for is a pointer to some sample code on how to hook into XP at a relatively low level.

Thanks,
Eric
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ejacksch
Asked:
ejacksch
1 Solution
 
Svetlin_PanayotovCommented:
Take a look here
http://www.ndis.com/papers/winpktfilter.htm
There's good sample that works on Win2K - ftp://ftp.wdj.com/pub/webzip/1110/plooy.zip

Also if you're familiar with assembler - http://www.programmersheaven.com/zone5/cat1132/35503.htm

Svetlin
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ejackschAuthor Commented:
Thanks Svetlin, much appreciated!
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