\label{Domain_Configuration_LangTZAuth}
Prior to LON-CAPA 2.7, default language and authentication type/argument
were defined in the domain's entry in the domain.tab file. Those settings
will continue to be used by servers in your domain until you have
displayed and saved the Default authentication/language/timezone data
table. Once that has been done, whenever values need to be determined
for these settings in the domain they will be retrieved from the configuration.db
file on the primary library server in your domain, which is where
information saved from the {}``Domain Configuration'' data tables
is stored. Any information in the domain.tab file will no longer be
consulted, except by servers running pre-2.7 versions of LON-CAPA.

Default domain configurations can be assigned for: 

\begin{itemize}
\item default language used by users in your domain, unless overridden by
a user preference
\item default authentication type for new users in the domain. You will
need to set the default authentication if you intend to allow a user
to create a LON-CAPA account if the user successfully authenticated
via a central service at your institution (e.g., Kerberos), but is
without a LON-CAPA account. The default authentication is also the
default offered when Course Coordinators or Authors create new accounts,
assuming user creation is permitted in these contexts.
\item default timezone - this will be the timezone used when showing any
times in your domain, unless overridden at a course level, by a course-wide
timezone. The timezones available are mostly in the form Continent/City,
although for the USA there are some in the form America/State/City
as well as EST5EDT, CST6CDT, MST7MDT, PST8PDT and HST (for Eastern,
Central, Mountain, Pacific and Hawaii Timezones, which adjust for
daylight savings as appropriate). If no default timezone is set times
will be displayed according to the timezone of the server hosting
the user's LON-CAPA session.
\end{itemize}