\label{Authentication}

People are authenticated with a standard username and password scheme.
LON-CAPA ships with support for the following authentication scheme:

\begin{enumerate}
\item Internally authenticated: LON-CAPA specific passwords, choose this when in doubt. 
\item System authentication: authentication using the UNIX authentication scheme on the server.  
\item Kerberos authenticated: authentication based on either a Kerberos 4 or 5 server. 
\item External authentication: custom authentication integrated with an authentication server other than Kerberos (e.g. LDAP).
\end{enumerate}

If the student or user you are adding to LON-CAPA will be using the same account as another system (e.g. email), then your system administrator can tell you which authentication type you should choose.  If you are creating a user that is unique only to LON-CAPA, then select ``internally authenticated''.