What Is DNS Failure? (And How To Fix It)

DNS server isn't responding,' 'DNS lookup failed,' 'NXDOMAIN' and 'DNS resolution timeout' are just some of the possible ways ...
PC Magazine

Are You a Zombie? How to Check for Open DNS Resolvers

When the IBM PC was new, I served as the president of the San Francisco PC User Group for three years. That’s how I met PCMag’s editorial team, who brought me on board in 1986. In the years since that ...
GIGAZINE

``Reverse DNS'' is a site where you can check at a glance who owns an IP address and how much.

Reverse DNS is a site that displays reverse lookup results for approximately 4.3 billion IPv4 addresses in a map-like manner. This is what it looks like when you access the site. I can't tell what it ...
Los Angeles Times

Here’s how to check your computer for the DNS Changer Malware

As many as 64,000 Americans’ computers may still be affected by malware that will cause them to lose Internet service come Monday, so if you haven’t already, make sure you aren’t among them. There’s ...
PC Magazine

Is Your VPN Leaking?

For the most part, if you pick one of our best virtual private network services, you'll be well protected. But if your VPN is leaking data, there are steps you can take. I've been writing about ...

What the Huge AWS Outage Reveals About the Internet

Amazon Web Services experienced DNS resolution issues on Monday morning, taking down wide swaths of the web—and highlighting ...
PC Magazine

Are You a Zombie? How to Check for Open DNS Resolvers

The recent Distributed Denial of Service attack against international spam-fighting group SpamHaus used a technique called DNS reflection to generate huge amounts of traffic for SpamHaus, overloading ...