Network Time Protocol (NTP) is required for Google Authenticator to function properly

Network Time Protocol will contact public time servers on the Internet

to get the current date and time, which are required for Google

Authenticator to function properly, and corrects any time drift that

can occur on the server.



Especially cloud-based virtual machines are susceptible to time drift.

A deviation of 30 seconds can already be a problem when it comes to

Google Authenticator.

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