BusinessWeek: Open-Source Security Is Opening Eyes

“Back in 1999, Dave Wreski was working as an Internet security
architect at United Parcel Service (UPS). A aficionado of
Linux–one variety of the free and nonproprietary type of software
known as open source–Wreski thought he saw a future in computer
security. In May of that year he ponied up $100,000, hired two
programmer friends, and launched a company called Guardian Digital
in Allendale, N.J. Originally a security consulting firm, Guardian
Digital quickly morphed into a seller of security hardware and
open-source software for e-commerce, e-mail, and so-called
perimeter servers that run firewalls, intrusion-detection systems,
and virtual private networks.

“At the time, Wreski was bucking conventional wisdom: After all,
who builds a security system from free software, when proprietary
systems are seemingly safer? Today, however, Wreski’s dream doesn’t
seem so ridiculous. Guardian Digital now employs more than 20
people and boasts more than 5,000 customers for its hardware,
software updates, and support. They’re mostly small and midsize
companies, but they also include Sony Electronics (SNE ) and
AT&T New Zealand…”

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