The DoorStop X Firewall

DoorStop X 2.4 is available for Mac OS X 10.5.8 or later and supports Lion (Mac OS X 10.7) . You can download a free, fully-functional 30-day evaluation version here. You can purchase DoorStop either individually or as part of the integrated DoorStop X Security Suite. DoorStop X 2.4 features include:

DoorStop was the first Macintosh firewall, for Mac OS 8.1 in 1998. Open Door has been shipping security products since that time. We know how to help you make your Macintosh secure on the Internet.

Copyright (C) 2000-2011, Open Door Networks, Inc. Who's There? Firewall Advisor and DoorStop are trademarks of Open Door Networks, Inc.