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*Do you know what NXDOMAIN is?

Suggested article: What is NXDOMAIN?

The acronym NXDOMAIN means a non-existent domain, and it defines an error DNS message received by the Recursive DNS server (the client). It appears when the requested domain cannot be resolved to an IP address. Simply put, users see the NXDOMAIN error message when the requested domain does not exist.

The NXDOMAIN error message is not the most desirable thing to see. However, there are several scenarios in which a user on the network can trigger an NXDOMAIN. They are the following:

• There is a mistake in the configuration of the application of the client.
• When requesting the precise website, the user makes a typo.
• The web browser accesses random local domains on startup in order to detect hijacking behavior.
• The user's device is infected with a bot utilizing a domain-generating algorithm (DGA) to participate in a botnet.

In case you are curious to learn more about this topic, we suggest you take a look at the following article about NXDOMAIN!