time.conf - configuration file for the pam_time module
The pam_time PAM module does not authenticate the user, but instead it restricts
access to a system and or specific applications at various times of the day
and on specific days or over various terminal lines. This module can be
configured to deny access to (individual) users based on their name, the time
of day, the day of week, the service they are applying for and their terminal
from which they are making their request.
For this module to function correctly there must be a correctly formatted
/etc/security/time.conf file present. White spaces are ignored and lines maybe
extended with '\' (escaped newlines). Text following a '#' is ignored to the
end of the line.
The syntax of the lines is as follows:
In words, each rule occupies a line, terminated with a newline or the beginning
of a comment; a ' #
'. It contains four fields separated with
semicolons, ' ;
The first field, the services
field, is a logic list of PAM service names
that the rule applies to.
The second field, the tty
field, is a logic list of terminal names that
this rule applies to.
The third field, the users
field, is a logic list of users or a netgroup
of users to whom this rule applies.
For these items the simple wildcard '*' may be used only once. With netgroups no
wildcards or logic operators are allowed.
field is used to indicate the times at which this rule applies.
The format here is a logic list of day/time-range entries. The days are
specified by a sequence of two character entries, MoTuSa for example is Monday
Tuesday and Saturday. Note that repeated days are unset MoMo = no day, and
MoWk = all weekdays bar Monday. The two character combinations accepted are Mo
Tu We Th Fr Sa Su Wk Wd Al, the last two being week-end days and all 7 days of
the week respectively. As a final example, AlFr means all days except Friday.
Each day/time-range can be prefixed with a '!' to indicate "anything
but". The time-range part is two 24-hour times HHMM, separated by a
hyphen, indicating the start and finish time (if the finish time is smaller
than the start time it is deemed to apply on the following day).
For a rule to be active, ALL of service+ttys+users must be satisfied by the
Note, currently there is no daemon enforcing the end of a session. This needs to
Poorly formatted rules are logged as errors using syslog
These are some example lines which might be specified in
All users except for root
are denied access to console-login at all
login ; tty* & !ttyp* ; !root ; !Al0000-2400
Games (configured to use PAM) are only to be accessed out of working hours. This
rule does not apply to the user waster
games ; * ; !waster ; Wd0000-2400 | Wk1800-0800
pam_time was written by Andrew G. Morgan <email@example.com>.