DNS Cache Poisoning

What Does DNS Cache Poisoning Mean?

DNS cache poisoning is a process by which DNS server records are illegitimately modified to replace a website address with a different address. DNS cache poisoning is used by hackers and crackers to redirect visitors of a particular website to their defined/desired website.


DNS cache poisoning is also known as DNS spoofing.

Techopedia Explains DNS Cache Poisoning

DNS cache poisoning works when the security controls of a DNS server are compromised and accessed by a hacker. The hacker replaces a website’s associated DNS records with a different website, one that may contain spam, malware and/or viruses. This is done by changing the associated domain name’s IP address to that of the malicious website. When the user accesses the target website from the corrupted DNS server, the hacker’s website appears as opposed to the original website.


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Margaret Rouse

Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…