An unknown host is an error message that displays when a device fails to detect another system’s domain name or hostname. It usually happens due to DNS misconfiguration.

Because the unknown host is not a security threat, cyber criminals mainly exploit the DNS misconfiguration to attack the users’ devices. In such cases, users must instantly remove the data breach to protect their sensitive data, including financial information, bank accounts, and login credentials.

When Does an Unknown Host Occur?

How to Resolve an Unknown Host