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diff --git a/Linux-PAM/doc/modules/pam_time.sgml b/Linux-PAM/doc/modules/pam_time.sgml new file mode 100644 index 00000000..ef761223 --- /dev/null +++ b/Linux-PAM/doc/modules/pam_time.sgml @@ -0,0 +1,166 @@ +<!-- + $Id: pam_time.sgml,v 1.4 2002/05/10 04:03:02 agmorgan Exp $ + + This file was written by Andrew G. Morgan <morgan@kernel.org> +--> + +<sect1>Time control + +<sect2>Synopsis + +<p> +<descrip> + +<tag><bf>Module Name:</bf></tag> +<tt/pam_time/ + +<tag><bf>Author:</bf></tag> +Andrew G. Morgan <tt><morgan@kernel.org></tt> + +<tag><bf>Maintainer:</bf></tag> +Author + +<tag><bf>Management groups provided:</bf></tag> +account + +<tag><bf>Cryptographically sensitive:</bf></tag> + +<tag><bf>Security rating:</bf></tag> + +<tag><bf>Clean code base:</bf></tag> + +<tag><bf>System dependencies:</bf></tag> +Requires a configuration file <tt>/etc/security/time.conf</tt> + +<tag><bf>Network aware:</bf></tag> +Through the <tt/PAM_TTY/ item only + +</descrip> + +<sect2>Overview of module + +<p> +Running a well regulated system occasionally involves restricting +access to certain services in a selective manner. This module offers +some time control for access to services offered by a system. Its +actions are determined with a configuration file. 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. + +<sect2>Account component + +<p> +<descrip> + +<tag><bf>Recognized arguments:</bf></tag> + +<tag><bf>Description:</bf></tag> + +This module bases its actions on the rules listed in its configuration +file: <tt>/etc/security/time.conf</tt>. Each rule has the following +form, +<tscreen> +<em/services/<tt/;/<em/ttys/<tt/;/<em/users/<tt/;/<em/times/ +</tscreen> +In words, each rule occupies a line, terminated with a newline or the +beginning of a comment; a `<tt/#/'. It contains four fields separated +with semicolons, `<tt/;/'. The fields are as follows: + +<p> +<itemize> +<item><em/services/ - +a logic list of service names that are affected by this rule. + +<item><em/ttys/ - +a logic list of terminal names indicating those terminals covered by +the rule. + +<item><em/user/ - +a logic list of usernames to which this rule applies + +<p> +By a logic list we mean a sequence of tokens (associated with the +appropriate <tt/PAM_/ item), containing no more than one wildcard +character; `<tt/*/', and optionally prefixed with a negation operator; +`<tt/!/'. Such a sequence is concatenated with one of two logical +operators: <tt/&/ (logical AND) and <tt/|/ (logical OR). Two +examples are: <tt>!morgan&!root</tt>, indicating that this rule +does not apply to the user <tt>morgan</tt> nor to <tt>root</tt>; and +<tt>tty*&!ttyp*</tt>, which indicates that the rule applies only +to console terminals but not pseudoterminals. + +<item><em/times/ - a logic list of times at which this rule +applies. The format of each element is a day/time-range. The days are +specified by a sequence of two character entries. For example, +<tt/MoTuSa/, indicates Monday Tuesday and Saturday. Note that +repeated days are <em/unset/; <tt/MoTuMo/ indicates Tuesday, and +<tt/MoWk/ means all weekdays bar Monday. The two character +combinations accepted are, +<tscreen> +<verb> +Mo Tu We Th Fr Sa Su Wk Wd Al +</verb> +</tscreen> +The last two of these being <em/weekend/ days and <em/all 7 days/ of +the week respectively. + +<p> +The time range part is a pair of 24-hour times, <em/HHMM/, separated +by a hyphen -- indicating the start and finish time for the rule. If +the finsish time is smaller than the start time, it is assumed to +apply on the following day. For an example, <tt/Mo1800-0300/ indicates +that the permitted times are Monday night from 6pm to 3am the +following morning. + +</itemize> + +<p> +Note, that the given time restriction is only applied when the first +three fields are satisfied by a user's application for service. + +<p> +For convenience and readability a rule can be extended beyond a single +line with a `<tt>\</tt><em/newline/'. + +<tag><bf>Examples/suggested usage:</bf></tag> + +The use of this module is initiated with an entry in the +<bf/Linux-PAM/ configuration file of the following type: +<tscreen> +<verb> +# +# apply pam_time accounting to login requests +# +login account required pam_time.so +</verb> +</tscreen> +where, here we are applying the module to the <em/login/ application. + +<p> +Some examples of rules that can be placed in the +<tt>/etc/security/time.conf</tt> configuration file are the following: +<descrip> + +<tag><tt>login ; tty* & !ttyp* ; !root ; !Al0000-2400</tt></tag> +all users except for <tt/root/ are denied access to console-login at +all times. + +<tag><tt>games ; * ; !waster ; Wd0000-2400 | Wk1800-0800</tt></tag> +games (configured to use Linux-PAM) are only to be accessed out of +working hours. This rule does not apply to the user <tt/waster/. + +</descrip> + +<p> +Note, currently there is no daemon enforcing the end of a session. +This needs to be remedied. + +<p> +Poorly formatted rules are logged as errors using <tt/syslog(3)/. + +</descrip> + +<!-- +End of sgml insert for this module. +--> |