User manual

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(Password Authentication Protocol) if you know which authentication type the server is using (when
acting as a client), or the authentication type you want the clients to use when they are connecting to
you (when acting as a server). When using PAP, the password is sent unencrypted, while CHAP
encrypts the password before sending, and also allows for challenges at different periods to ensure
that an intruder has not replaced the client.