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What an amazing world we live in! Almost anything you can imagine can be researched, compared, admired, studied, and in many cases, bought, with the click of a mouse. The Internet has changed our lives, putting a world of opportunity before us. Unfortunately, it has also put a world of opportunity into the hands of those whose motives are less than honorable. A firewall, a piece of software or hardware that erects a barrier between your computer and those who might like to invade it, is one solution.If you've been using the Internet for any length of time, you've probably received some unsavory and unsolicited e-mail. If you run a business, you may be worried about the security of your data and your customers' privacy. At home, you want to protect your personal information from identity thieves and other shady characters. Firewalls For Dummies(r) will give you the lowdown on firewalls, then guide you through choosing, installing, and configuring one for your personal or bus iness network.Firewalls For Dummies(r)helps you understand what firewalls are, how they operate on different types of networks, what they can and can't do, and how to pick a good one (it's easier than identifying that perfect melon in the supermarket.) You'll find out about* Developing security policies* Establishing rules for simple protocols* Detecting and responding to system intrusions* Setting up firewalls for SOHO or personal use* Creating demilitarized zones* Using Windows or Linux as a firewall* Configuring ZoneAlarm, BlackICE, and Norton personal firewalls* Installing and using ISA server and FireWall-1With the handy tips and hints this book provides, you'll find that firewalls are nothing to fear - that is, unless you're a cyber-crook! You'll soon be able to keep your data safer, protect your family's privacy, and probably sleep better, too.
As network traffic passes through the firewall, the firewall decides which traffic to forward and which traffic not to forward, based on rules that you have defined. All firewalls screen traffic that comes into your network, but a good firewall should also screen outgoing traffic. Normally a ...
Firewalls for Dummies book by Brian Komar - Thriftbooks
Firewalls ForDummies ® will give you the lowdown onfirewalls, then guide you through choosing, installing, andconfiguring one for your personal or bus iness network. Firewalls For Dummies ® helps youunderstand what firewalls are, how they operate on different typesof networks, what they can and can't do, and how to pick agood one (it's ...
Getting a Close Look at Firewalls - dummies
About iptables. iptables is a command-line firewall utility that uses policy chains to allow or block traffic. When a connection tries to establish itself on your system, iptables looks for a rule in its list to match it to.