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I.e.:

  • as slim as GhostWall(*) (implementing trivial allow/disallow rules based on port/protocol/direction)
  • preferably, with a GUI

but

  • open source
  • supported (not abandoned some years ago)

(*) -- which looks like this:

enter image description here

Anyone?

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closed as not a real question by nhinkle Mar 14 '12 at 18:02

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

2  
what's wrong with the builtin-firewall? –  akira Mar 14 '12 at 17:40
1  
what do you consider a small firewall? What features are missing from a regular firewall –  uSlackr Mar 14 '12 at 18:00
1  
@akira I'm on XP –  mlvljr Mar 14 '12 at 18:12
    
@uSlackr updated the question –  mlvljr Mar 14 '12 at 18:12
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1 Answer

up vote 4 down vote accepted

Firewall PAPI is a lightweight (setup file=276 KB) open source firewall for Windows.

Core Force is a free open source comprehensive endpoint security solution for Windows systems. Its setup file is 19.6 MB.

You may check this page for more alternatives.

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1  
Let this accepted (wipfw.sourceforge.net from the last link seems interesting), and hence the question will possibly not last long.. –  mlvljr Mar 14 '12 at 19:26
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