Armed with open source
Open source technologies already permeate most data centers, and their influence is spreading. However, data center managers who wouldn't think twice about dropping a new Linux server into a rack feel very differently about building an open source firewall as the main barrier between their own network and the great unwashed. Security remains outside the open-source comfort zone.
Still, there are four primary arguments in favor of open-source security tools: agility in the face of changing threats, control of one's own destiny with full source code, customization to one's own requirements, and lower cost (see "Agility, control, customization, affordability"). With that in mind, good examples of freely available security products abound.
Full Story.
Open source security is already in data centers, even if network executives think it isn't. One common example is OpenSSL, an open source-library implementation of the SSL encryption standard with an accompanying set of tools and utilities.
Any commercial product that uses SSL for such features as Web-based management or client/server control channels almost certainly is using OpenSSL. With no reason to believe that they could write better or more bug-free code, commercial developers naturally gravitate to reusable, open source components wherever possible.
In the security world, open source has had its greatest success at the component level, rather than as full-fledged stand-alone products. These well-tested and well-accepted security components are incorporated into complete products by the ever-growing corps of security product vendors.
You're already using open source security
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