TIME.CONF(5) Linux-PAM Manual TIME.CONF(5)
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
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
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.
The times 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
For a rule to be active, ALL of service+ttys+users must be satisfied by
the applying process.
Note, currently there is no daemon enforcing the end of a session. This
needs to be remedied.
Poorly formatted rules are logged as errors using syslog(3).
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(8), pam.d(5), pam(7)
pam_time was written by Andrew G. Morgan <morganATkernel.org>.
Linux-PAM Manual 07/27/2008 TIME.CONF(5)