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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Wall off the World—Install a Better Firewall in an Afternoon

More advanced firewalls can be time-consuming to install, but they are not difficult to use. Take the time to fortify your defenses. It is really worthwhile.Install a Two-way Software Firewall

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Critical SQL Injection in mail4U is a production of Bagan Cybertech

PlanetCreator has reported another critical SQL Injection (vulnerability) on mail4U is a production of Bagan Cybertech http://www.mail4u.com.mm/ SQL injection is a code injection technique that exploits a security vulnerability occurring

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TCP/IP Tutorial

This tutorial is intended to supply a brief overview of TCP/IP protocol. Explanations of IP addresses, classes, netmasks, subnetting, and routing are provided, and several example networks are considered. The

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