The otp-ov-plugin command is plug-in authentication module for OpenVPN authenticating to the OTP database. The username and password (challenge response) are passed via environment variables user and pass. A successful authentication will set a return code of 0, authentication failure 1, and program failure -1.
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Pathname of OTP database.
Allow users which do not exist in the OTP database to successfully authenticate without using a One Time Password.
Set service name for send-token function.
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Set the OTP challenge window.
Display software version.