DoorStop X Firewall

Commercial; $49

Current Version: 2.3 (October 26, 2009)

Open Door Networks produces the DoorStop X software-based firewall, which works with the Who's There? Firewall Advisor software.

Version 2.3 adds/changes the following:

• Snow Leopard support. Version 2.3 of the products provides full Snow Leopard support, including details and advice regarding Snow Leopard-specific issues. Also bug fixes.
• iPhone support. Version 2.3 of the products includes information and advice specific to the iPhone and its integration with the Macintosh. The book, newly renamed to include "iPhone" in the title, now has a whole chapter devoted to the iPhone and iPod touch, plus iPhone details throughout.
• Twitter stream. Security issues change so quickly these days, sometimes a blog isn't even fast enough. So, with 2.3 we've added a Twitter stream too, and integrated it with the products through a new "News" menu. Look for real-time links to evolving Mac and iPhone Internet security issues here.
• Other enhancements. 2.3 products include a number of other enhancements, such as non-admin user support for the DoorStop X firewall, a much improved geo-location service for the Who's There? Firewall Advisor and information and advice on many new security issues.