programming a firewall...

This is a discussion on programming a firewall... within the Windows Programming forums, part of the Platform Specific Boards category; i was wondering how you make a firewall in windows , do you enumrate all the process's in the task ...

  1. #1
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    programming a firewall...

    i was wondering how you make a firewall in windows , do you enumrate all the process's in the task manager for winsock connect?, i know how to get a function pointer to connect inside ws2_32.dll but i dont know how to say when its being used , thanks if you can help

  2. #2
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    I'm pretty sure that it doesn't use that method. I do not know what method it DOES use, but I'm expecting it works sort of like a filter layer on the TCP/IP stack system.

    This says article that it describes how it may work in several different layers - I only read the first half-page, and it seems to confirm my original answer.
    NT Kernel Resources: Firewall For Windows

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    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

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    Quote Originally Posted by Anddos View Post
    i was wondering how you make a firewall in windows , do you enumrate all the process's in the task manager for winsock connect?, i know how to get a function pointer to connect inside ws2_32.dll but i dont know how to say when its being used , thanks if you can help
    Building Internet firewalls

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    I saw your firewall info request on the newsgroups. Check it. You'll find complete Windows firewall source code for your review.

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