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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Software Firewalls: Programs That Stop Hackers

A good software firewall for home users should have the following attributes: * It’s easy to configure. * It’s frugal with system resources so it doesn’t bog down the computer.

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CHScanner

CHScanner is an ARP, IPv4 and IPv6 network scanner with 31 scan methods: it scans for open ports, protocols, NetBIOS informations and Windows shares, SNMP information, and WMI (WBEM) information.

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Single-line attack infects thousands of Web sites

Thousands of Web sites have fallen victim to an attack using just one line of code that maliciously re-directs browsers via Javascript to servers that are hosting a variety of

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