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Implemting a packet filter for WinXP

Posted on 2004-08-31
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Last Modified: 2010-04-24
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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Question by:ejacksch
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Svetlin_Panayotov earned 2000 total points
ID: 11949189
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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by:ejacksch
ID: 11962441
Thanks Svetlin, much appreciated!
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