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Dumb question:

Is there an equivalent of iptables on Windows? Could I install one via cygwin?

The real question: how can I accomplish on Windows what I can accomplish via iptables? Just looking for basic firewall functionality (e.g. blocking certain IP addresses)

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3  
No such thing as a dumb question –  Mark Henderson Nov 30 '10 at 23:07
1  
Of course there's such a thing as a dumb question, this just isn't one. –  Task May 29 at 17:36

3 Answers 3

up vote 19 down vote accepted

One way would be with the netsh command:

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+1 - netsh advfirewall is an absolute nessesary rule to learn for anyone scripting anything security related on Windows Server –  Mark Henderson Nov 30 '10 at 23:06
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exactly what i was looking for, thanks. –  Aaron F. Nov 30 '10 at 23:28
    
Does netsh advfirewall support URLs, or just IP addresses? –  Parker Apr 26 '13 at 1:55
    
Just IP addresses and such, though it can also filter based on the executable sending or receiving network traffic, or the AD credentials of the user/group/computer involved. For URL filtering, you'd want to look for a filtering proxy of some kind. –  James Sneeringer Apr 26 '13 at 14:11

WIPFW looks very promising, especially if your after that iptables rule creation flavor.

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There is a built-in firewall in XP, Server 2003 and later releases.

It has an API through which you can programatically change, enable, and disable rules.

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I want something I can access programmtically -- add IP addresses to the firewall from within a script or software module. –  Aaron F. Nov 30 '10 at 22:51

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