This book excerpt is from Chapter 2 of the second edition of Firewalls and Internet Security: Repelling the Wily Hacker . This chapter, titled “A Security Review of Protocols: Lower Layers,” examines ...

The firewall is one of the most important security features in a computer environment. In the classic sense, a firewall is set up on an appliance, such as a computer that fulfills just a single, ...

Default deny.

Home computer users and small-business entrepreneurs usually know enough about broadband Internet security to protect their data with a firewall. In most of these cases, a single firewall at a point ...

Other things have changed, too. Today, standalone firewall products are more the exception than the rule. I took a look at five major firewalls on the market today, and almost everything that came my ...

Q: What does a firewall do and is it something I need to get? A: In the early days of the Internet, we often connected through a dial-up modem or some other form of direct connection. When you ...

Firewall architectures have been changing for 35 years, sometimes to accommodate better technology and hardware, but just as ...

My lightbulbs do not need internet access and they never should ...

If you see the message Security or firewall might be blocking the connection following completion of Windows Network Diagnostics to determine what’s causing internet or network connection issues on ...

If you're ignoring or have disabled Windows Firewall, you might be missing out on some good, basic protections that are easy to set up and maintain. Windows Firewall has been enabled by default since ...

The Firewalla Gold Pro Security Firewall is like the bouncer on the door of a nightclub. Its job is to stop anything harmful from getting into a network. It also stops risky data from leaving a ...