Domain name sinkholes and those funky domain registrations

Palo Alto Networks Inc was granted a patent today related to domain sinkholing, and it’s a continuation patent of one that was granted in 2016.

It reminded me of times I’ve seen companies (notably Microsoft) register a bunch of nonsensical domain names. Why would a company register a lot of domains with random digits and letters?

The answer is often that it’s a sinkhole.

A sinkhole redirects or blocks traffic meant for a destination. They are used by the security community to stop botnet traffic, phishing and other bad activity.

There are many ways to create a sinkhole. An ISP can simply divert traffic from the IP address you see in Whois to another. A company (or the government) can also go through the courts to get control of a domain name and then change its nameservers. ..Read More..

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