They further supplement these public security mechanisms by using locks on doors and windows, employee badges, and security systems.
If all these defenses fail and a business is a victim of a crime, the business’s insurance agency absorbs part of the impact by compensating the business for a portion of the loss.
Hybrid worms, in particular, have penetrated corporate networks through email systems, and then have spread quickly to unprotected internal systems.
Applying host-based firewalls to all systems, including those behind the corporate firewall, should now be standard practice.
Introduction The Nature of Today’s Attackers The Firewall to the Rescue Types of Firewalls How a Firewall Works Host-Based Firewalls Network Firewalls Firewalls for Small Offices and Home Offices Firewalls for Enterprises Firewall Products Summary Firewalls are a key part of keeping networked computers safe and secure.
All computers deserve the protection of a firewall, whether it’s the thousands of servers and desktops that compose the network of a Fortune 500 company, a traveling salesperson’s laptop connecting to the wireless network of a coffee shop, or your grandmother’s new PC with a dial-up connection to the Internet.
Although home users have traditionally used only host-based firewalls, recent trends in security exploits highlight the importance of using both types of firewalls together.
This type of attack does happen, but it makes up a very small portion of the total network attacks that occur.
Today, worms and viruses initiate the vast majority of attacks.
By making it difficult for attackers to get into your computer, by making them invest lots of time, you become less attractive.
Firewalls very effectively block most bad guys from compromising an individual computer.