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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>6.34. pam_time - time controled access</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="Linux-PAM_SAG.html" title="The Linux-PAM System Administrators' Guide"><link rel="up" href="sag-module-reference.html" title="Chapter 6. A reference guide for available modules"><link rel="prev" href="sag-pam_tally2.html" title="6.33. pam_tally2 - login counter (tallying) module"><link rel="next" href="sag-pam_timestamp.html" title="6.35. pam_timestamp - authenticate using cached successful authentication attempts"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">6.34. pam_time - time controled access</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="sag-pam_tally2.html">Prev</a> </td><th width="60%" align="center">Chapter 6. A reference guide for available modules</th><td width="20%" align="right"> <a accesskey="n" href="sag-pam_timestamp.html">Next</a></td></tr></table><hr></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="sag-pam_time"></a>6.34. pam_time - time controled access</h2></div></div></div><div class="cmdsynopsis"><p><code class="command">pam_time.so</code> [
debug
] [
noaudit
]</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_time-description"></a>6.34.1. DESCRIPTION</h3></div></div></div><p>
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.
</p><p>
By default rules for time/port access are taken from config file
<code class="filename">/etc/security/time.conf</code>.
</p><p>
If Linux PAM is compiled with audit support the module will report
when it denies access.
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-time.conf-description"></a>6.34.2. DESCRIPTION</h3></div></div></div><p>
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.
</p><p>
For this module to function correctly there must be a correctly
formatted <code class="filename">/etc/security/time.conf</code> file present.
White spaces are ignored and lines maybe extended with '\' (escaped
newlines). Text following a '#' is ignored to the end of the line.
</p><p>
The syntax of the lines is as follows:
</p><p>
<em class="replaceable"><code>services</code></em>;<em class="replaceable"><code>ttys</code></em>;<em class="replaceable"><code>users</code></em>;<em class="replaceable"><code>times</code></em>
</p><p>
In words, each rule occupies a line, terminated with a newline
or the beginning of a comment; a '<span class="emphasis"><em>#</em></span>'.
It contains four fields separated with semicolons,
'<span class="emphasis"><em>;</em></span>'.
</p><p>
The first field, the <em class="replaceable"><code>services</code></em> field,
is a logic list of PAM service names that the rule applies to.
</p><p>
The second field, the <em class="replaceable"><code>tty</code></em>
field, is a logic list of terminal names that this rule applies to.
</p><p>
The third field, the <em class="replaceable"><code>users</code></em>
field, is a logic list of users or a netgroup of users to whom this
rule applies.
</p><p>
For these items the simple wildcard '*' may be used only once.
With netgroups no wildcards or logic operators are allowed.
</p><p>
The <em class="replaceable"><code>times</code></em> 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.
</p><p>
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).
</p><p>
For a rule to be active, ALL of service+ttys+users must be satisfied
by the applying process.
</p><p>
Note, currently there is no daemon enforcing the end of a session.
This needs to be remedied.
</p><p>
Poorly formatted rules are logged as errors using
<span class="citerefentry"><span class="refentrytitle">syslog</span>(3)</span>.
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_time-options"></a>6.34.3. OPTIONS</h3></div></div></div><div class="variablelist"><dl class="variablelist"><dt><span class="term">
<code class="option">debug</code>
</span></dt><dd><p>
Some debug information is printed with
<span class="citerefentry"><span class="refentrytitle">syslog</span>(3)</span>.
</p></dd><dt><span class="term">
<code class="option">noaudit</code>
</span></dt><dd><p>
Do not report logins at disallowed time to the audit subsystem.
</p></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_time-types"></a>6.34.4. MODULE TYPES PROVIDED</h3></div></div></div><p>
Only the <code class="option">account</code> type is provided.
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_time-return_values"></a>6.34.5. RETURN VALUES</h3></div></div></div><div class="variablelist"><dl class="variablelist"><dt><span class="term">PAM_SUCCESS</span></dt><dd><p>
Access was granted.
</p></dd><dt><span class="term">PAM_ABORT</span></dt><dd><p>
Not all relevant data could be gotten.
</p></dd><dt><span class="term">PAM_BUF_ERR</span></dt><dd><p>
Memory buffer error.
</p></dd><dt><span class="term">PAM_PERM_DENIED</span></dt><dd><p>
Access was not granted.
</p></dd><dt><span class="term">PAM_USER_UNKNOWN</span></dt><dd><p>
The user is not known to the system.
</p></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_time-files"></a>6.34.6. FILES</h3></div></div></div><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="filename">/etc/security/time.conf</code></span></dt><dd><p>Default configuration file</p></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-time.conf-examples"></a>6.34.7. EXAMPLES</h3></div></div></div><p>
These are some example lines which might be specified in
<code class="filename">/etc/security/time.conf</code>.
</p><p>
All users except for <span class="emphasis"><em>root</em></span> are denied access
to console-login at all times:
</p><pre class="programlisting">
login ; tty* & !ttyp* ; !root ; !Al0000-2400
</pre><p>
</p><p>
Games (configured to use PAM) are only to be accessed out of
working hours. This rule does not apply to the user
<span class="emphasis"><em>waster</em></span>:
</p><pre class="programlisting">
games ; * ; !waster ; Wd0000-2400 | Wk1800-0800
</pre><p>
</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="sag-pam_time-authors"></a>6.34.8. AUTHOR</h3></div></div></div><p>
pam_time was written by Andrew G. Morgan <morgan@kernel.org>.
</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sag-pam_tally2.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sag-module-reference.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sag-pam_timestamp.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">6.33. pam_tally2 - login counter (tallying) module </td><td width="20%" align="center"><a accesskey="h" href="Linux-PAM_SAG.html">Home</a></td><td width="40%" align="right" valign="top"> 6.35. pam_timestamp - authenticate using cached successful authentication attempts</td></tr></table></div></body></html>