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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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No such thing as a dumb question – Mark Henderson♦ Nov 30 '10 at 23:07
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3 Answers

up vote 15 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
exactly what i was looking for, thanks. – Aaron F. Nov 30 '10 at 23:28
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up vote 1 down vote

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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up vote 0 down vote

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

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