It my recent story on "Patching the Internet" a discussion on how Dan Kaminsky broke, then subsequently helped fix DNS and the Internet, a lot of discussion centered around how the patch was breaking ...

Undoubtedly, you’ve heard about viruses, hacker intrusions, trojan horses, and more that are constantly trying to bring your PC down. Is there a single thing that you can buy, like a hardware firewall ...

Firewalls, both hardware and software, protect computers from hackers and other online threats by blocking dangerous pieces of data from reaching the system. While hardware firewalls offer ...

Yesterday when we asked you what your favorite Windows firewall software is, we got back tons of responses, from ZoneAlarm to Sygate from free to commercial. Now we want to narrow down the choices to ...

Firewalls revisited It would appear a few people were a bit unhappy with the advice I offered a reader in a recent column entitled “Two Firewalls Too Much of a Good Thing.” Here’s a quick overview: A ...

Q: Should my company install a software firewall, or buy a dedicated hardware device for that function? A: As I tell my customers, deciding which type of firewall to use depends on what you're trying ...

Free firewalls offer the outbound monitoring that's missing in XP's firewall and off by default (and impractical) in Vista, but third-party tools may create problems of their own. Dennis O'Reilly ...

Two recent studies confirm what many security experts already know: Ninety-nine percent of Windows-based malware attacks can be stopped by the simple steps of turning on firewalls and applying routine ...

SuSE, a German seller of the Linux operating system, has released a new version of software for protective firewalls that can't be tampered with. Firewalls, though not invulnerable, are used to try to ...

Pranay Parab is an independent tech journalist based in Mumbai, India. He covers tech for Lifehacker, and specializes in tutorials and in-depth features. A firewall is an essential security tool for ...