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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 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:
services;ttys;users;times
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.
A logic list namely means individual tokens that are optionally
prefixed with '!' (logical not) and separated with '&' (logical
and) and '|' (logical or).
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 day).
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
/etc/security/time.conf.
All users except for root are denied access to console-login at
all times:
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(8)
pam_time was written by Andrew G. Morgan <morgan@kernel.org>.
This page is part of the linux-pam (Pluggable Authentication
Modules for Linux) project. Information about the project can be
found at ⟨http://www.linux-pam.org/⟩. If you have a bug report
for this manual page, see ⟨//www.linux-pam.org/⟩. This page was
obtained from the project's upstream Git repository
⟨https://github.com/linux-pam/linux-pam.git⟩ on 2023-12-22. (At
that time, the date of the most recent commit that was found in
the repository was 2023-12-18.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Linux-PAM Manual 12/22/2023 TIME.CONF(5)
Pages that refer to this page: pam_time(8)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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