lastlog shows root login when login is disabled.

The ubuntu ( command lastlog shows root has logged in two weeks ago. The passwd command shows root as locked as does getent root. /etc/ssh/sshd_config has “PermitRootLogin no” and “PasswordAuthentication no”

Should the logins reported by lastlog be a concern? They are from an ip address that cannot be identified by dig. Are the logins related to maintenance of the VM?

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After digging around I realized the logins were during the initial build of the system.