October 4, 2004
Protecting the Perimeter With OpenBSD
The Unix operating system has so many descendants and variations that organizations navigating the maze of choices can quickly become disoriented. Many of these projects were launched to offer operating systems unencumbered by the commercial and proprietary licenses tied to the original AT&T UNIX. One of the first open source major branches to develop this way is the BSD family, which has since spawned a number of descendants, including FreeBSD, NetBSD, and OpenBSD. Apple's Mac OS X is also based on a BSD operating system known as Darwin.