Firewall FAQ

Here are 15 frequently asked questions regarding firewalls. We've also provided some additional resources for your research.

Firewalls are one of the most basic security measures that you must have in place to protect your systems. We've gathered some of the most frequently asked questions regarding firewalls here and invited our expert, David M. Davis, to answer them and provide some additional resources.

The FAQ list will be constantly evolving, so you're invited to send us other questions you may have. Just e-mail them to us or post them in the discussion area at the end of this FAQ.

What is a firewall?

Why would you want a firewall?

Is a proxy server a firewall?

What is NAT?

Do firewalls stop viruses, Trojans, adware, and spyware?

How do I know that my firewall is really protecting my network?

What are the different types of firewalls?

What do VPNs have to do with firewalls?

If I have a firewall, do I have a DMZ?

What are IDS and IPS? Also, what do they have to do with firewalls?

What is a DoS attack and will a firewall protect me from it?

How do you configure, monitor, and control a firewall?

How do I know what firewall I should use for my business?

What are some new features to look for in firewalls?

How can I configure an inexpensive firewall for my company?

You may also choose to download the Firewalls FAQ in one file.

Editor's Picks

Free Newsletters, In your Inbox