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Who needs security anyway? YOU DO! Custom Security: Home and Business Burglar and Fire Systems Subnet Calculator: An online subnet calculator IP Port listing: Listing of some common ports and their uses. SANS Institute: (System Administration, Networking, and Security) Institute is a cooperative research and education organization through which more than 165,000 system administrators, security professionals, and network administrators share the lessons they are learning and find solutions for challenges they face.
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