Tiger's improved firewall (and how to use it)
As with all the major upgrades to OS X, Apple has made much of the many enhancements and new features available in Tiger. Under the banner of improved stability and security was an upgrade to the firewall software, ipfw. More than bug fixes and polish, this update introduced a whole new firewall called ipfw2. It works just the like the old firewall, but has some new features that allow greater flexibility and more control. In this article I'll show you some of the new features and how you can use them to make managing your firewall easier.
By Peter Hickman at O'Reilly.
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