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Who's There?... View, understand and react to access attempts detected by your firewall...

What's New

Version 2.3:
  • full support for Snow Leopard (Mac OS X 10.6)
  • integrated security book fully updated for Snow Leopard and the iPhone
  • new "News" menu
  • new Twitter stream at http://twitter.com/isfym
  • significantly improved geo-location (map) support
  • new and updated service definitions
  • bug fixes


Mac OS X 10.3.9 or later
DoorStop X Firewall, Norton Personal Firewall, or any firewall that uses Mac OS X's built-in firewall capability.

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2 2


Current Version (2.x)


Downloads 11,877
Version Downloads 1,335
License Demo
Date 26 Oct 2009
Platform OS X / PPC 32 / Intel 32
Price $29.00
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