144 lines
8.0 KiB
HTML
144 lines
8.0 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Password expiration interval" />
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<meta name="abstract" content="The password expiration interval system value controls the number of days allowed before a password must be changed." />
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<meta name="description" content="The password expiration interval system value controls the number of days allowed before a password must be changed." />
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<meta name="DC.Relation" scheme="URI" content="rzamvpwdsysval.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="pwdexpitv" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Password expiration interval</title>
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</head>
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<body id="pwdexpitv"><a name="pwdexpitv"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Password expiration interval</h1>
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<div><p>The password expiration interval system value controls the number
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of days allowed before a password must be changed.</p>
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<p>If a user attempts to sign on after the password has expired, the system
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shows a display requiring that the password be changed before the user is
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allowed to sign on. You can set this value globally for all user profiles
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on the system or customize the password expiration for individual user profiles.
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For example you may want the security officer or other users with all object
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(*ALLOBJ) special authority to change their passwords more frequently than
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the rest of your users.</p>
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<p>See <a href="#pwdexpitv__quickref">Quick reference</a> table
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for an overview of the password expiration interval system value.</p>
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<div class="p">
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><caption>Table 1. Possible values for the password expiration interval
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system value</caption><thead align="left"><tr valign="bottom"><th valign="bottom" id="d0e29">iSeries™ Navigator </th>
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<th valign="bottom" id="d0e33">Character-based interface</th>
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<th valign="bottom" id="d0e35">Description </th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e29 ">Never Expire</td>
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<td valign="top" headers="d0e33 ">*NOMAX</td>
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<td valign="top" headers="d0e35 ">Users are not required to change their passwords.</td>
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</tr>
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<tr><td valign="top" headers="d0e29 ">Days after last change (1-366)</td>
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<td valign="top" headers="d0e33 "><em>limit-in-days</em></td>
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<td valign="top" headers="d0e35 ">Specify the number of days a password is valid before
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it expires.</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<p><strong>Relationship to security policy</strong></p>
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<p>Within your security policy, you should describe the password rules that
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are defined by the system values-related passwords. For this system value,
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let users know how long passwords on the system are valid and what they are
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required to do when the expiration date is exceeded. Several other password
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system values force users to make unique password every time their passwords
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expire on the system. Be sure to document those rules as well in your security
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policy.</p>
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<p>Stricter security environments would benefit from a shorter interval for
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password expiration. User should change their passwords periodically. This
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discourages sharing passwords with other system users. Passwords with a long
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or indefinite expiration interval provide potential intruders a longer period
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of access if they steal or obtain a password to a system. If an intruder obtained
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a valid password, potentially they could do damage or steal vital data on
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your system over a long period of time. If the expiration interval is shorter,
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then intruders would be limited in the amount of time they had access to your
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system. However, valid users may become frustrated if they are asked to change
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passwords too frequently. To strike a balance between protection and user
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needs, select a value between 30 and 90 days. For most installations that
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range is adequate. You may need to customize password expiration for individual
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users or systems. Perhaps you want your security administrator or any users
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with all object (*ALLOBJ) authority to change passwords more frequently to
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minimize the threat of someone stealing those passwords. You also may want
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to have shorter or longer password expiration intervals for specific systems,
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depending on the data that these systems contain.</p>
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<div class="p">
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<div class="tablenoborder"><a name="pwdexpitv__quickref"><!-- --></a><table cellpadding="4" cellspacing="0" summary="" id="pwdexpitv__quickref" frame="border" border="1" rules="all"><caption>Table 2. Quick Reference. Provides
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details for the password expiration interval system value.</caption><thead align="left"><tr valign="bottom"><th valign="bottom" id="d0e73">iSeries Navigator name</th>
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<th valign="bottom" id="d0e77">Expiration</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e73 ">Character-based interface name</td>
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<td valign="top" headers="d0e77 ">QPWDEXPITV</td>
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</tr>
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<tr><td valign="top" headers="d0e73 ">Authority</td>
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<td valign="top" headers="d0e77 "><p>All object access (*ALLOBJ)<br />
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Security administrator (*SECADM)</p>
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<div class="note"><span class="notetitle">Note:</span> The Security Officer (QSECOFR) user profile is shipped with
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these authorities. </div>
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</td>
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</tr>
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<tr><td valign="top" headers="d0e73 ">How to access</td>
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<td valign="top" headers="d0e77 "><div class="p"><strong>iSeries Navigator</strong><ol><li>Expand <span class="menucascade"><span class="uicontrol">Security</span> > <span class="uicontrol">Policies</span></span>.</li>
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<li>Right click <strong>Password Policy</strong> and select <strong>Properties</strong>.</li>
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<li>On the <strong>Expiration</strong> page, you will find the options for password
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expiration.</li>
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</ol>
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</div>
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<div class="p"><strong>Character-based interface</strong><ol><li>In the character-based interface, type <samp class="codeph">WRKSYSVAL QPWDEXPITV</samp>.</li>
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</ol>
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</div>
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</td>
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</tr>
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<tr><td valign="top" headers="d0e73 ">Changes take effect</td>
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<td valign="top" headers="d0e77 ">Immediately</td>
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</tr>
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<tr><td valign="top" headers="d0e73 ">Default value</td>
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<td valign="top" headers="d0e77 ">Never expire</td>
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</tr>
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<tr><td valign="top" headers="d0e73 ">Recommended value</td>
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<td valign="top" headers="d0e77 ">From 30 to 90 days</td>
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</tr>
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<tr><td valign="top" headers="d0e73 "><a href="rzamvlockdown.htm">Lockable</a></td>
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<td valign="top" headers="d0e77 ">Yes</td>
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</tr>
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<tr><td valign="top" headers="d0e73 ">Special considerations </td>
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<td valign="top" headers="d0e77 ">NA</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<p>For more in-depth information about this security value, see Chapter 3, <span class="q">"Security
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System Values"</span> in <a href="../books/sc415302.pdf" target="_blank">Security
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Reference</a>. </p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzamvpwdsysval.htm" title="In addition to setting signon system values, you also need to decide rules regarding users passwords">Password system values</a></div>
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</div>
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</div>
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</body>
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</html>
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