Microsoft says Linux isn't fit for the enterprise, but it's using Linux to help protect its servers from denial-of-service attacks. Web requests aimed at www.microsoft.com no longer go to machines on Microsoft's network. Instead, they're handled by the Akamai Technologies Inc. caching system, which runs Linux. A Microsoft spokeswoman says the goal is to "help ensure customers can get to the Blaster worm patch to protect their computers. Microsoft is using Akamai's extensive worldwide network to distribute the massive traffic that is illegally being directed at Microsoft by hackers."