ZyXEL Communications VPN Series Handbook page 779

4. Authorize with username, password and the token code successfully.
MONITOR > Log > View Log > Category and select "Authentication Server"
What Can Go Wrong?
1. An admin user only can be registered on one Google Authenticator. If you would
like to use another mobile device to authenticate the same admin user, click
"Revoke" to revoke registered user and user another mobile device to set up
Google Authenticator again.
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