Webopedia on Google+Webopedia on TwitterWebopedia on FacebookTech Bytes Blog
Main » TERM » D »


DNSChanger, also referred to as DNS Changer and nicknamed the "Internet doomsday" virus, is a type of malware used by hackers to change a user's DNS server settings, replacing the ISP's valid DNS servers with rogue DNS servers operated by the hacker or a third party.

In November 2011 the U.S. FBI discovered a network of rogue DNS servers that were being sent traffic by computers infected with the DNSChanger malware. The FBI disabled these servers and replaced them with servers that would share valid DNS addresses.

However, in a cost-cutting move the FBI shut these servers down on July 9th, 2012, which meant computers still infected with DNSChanger would no longer be able to access the Internet unless the DNS settings for these computers were redirected to new, "clean" DNS servers.

A website set up by the group responsible for the FBI's servers (the DNS Changer Working Group) has been created to help users diagnose computers and remove the DNSChanger malware if necessary.

8 Agenda Apps to Help Students Stay Organized

Webopedia's student apps roundup will help you to better organize your class schedule and stay on top of assignments and homework. Read More »

List of Free Shorten URL Services

A URL shortener is a way to make a long Web address shorter. Try this list of free services. Read More »

Top 10 Tech Terms of 2015

The most popular Webopedia definitions of 2015. Read More »

Java Basics, Part 1

Java is a high-level programming language. This guide describes the basics of Java, providing an overview of syntax, variables, data types and... Read More »

Java Basics, Part 2

This second Study Guide describes the basics of Java, providing an overview of operators, modifiers and control Structures. Read More »

The 7 Layers of the OSI Model

The Open System Interconnection (OSI) model defines a networking framework to implement protocols in seven layers. Use this handy guide to compare... Read More »