Whois queries are used to determine the IP address ranges associated with clients. A whois query can be run on most UNIX environments. In a Windows environment, the tools such as WsPingPro and Sam Spade can be used to perform whois queries. Whois queries can also be executed over the Web from www.arin.net and www.networksolutions.com.

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ZoneAlarm Using ”Scareware” to Sell Firewall

ZoneAlarm’s developer is using scareware tactics to force free-version clients into purchasing the full suite. Firewall developer Check Point Software Technologies has come under fire from consumers using the free

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Error Messages

Error Messages Overview Think about these questions. * Why are Error Conditions and Error Messages a security problem? * What’s wrong with error conditions? * Wouldn’t an administrator want the

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What are the general classes of hackers?

Hackers are categorized into the following classes: * Black Hat Hackers (Crackers): These are persons who are computer specialists and use their hacking skills to carry out malicious attacks on

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