124 lines
6.7 KiB
HTML
124 lines
6.7 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="Maximum length of passwords" />
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<meta name="abstract" content="This system value controls the maximum number of characters in a password." />
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<meta name="description" content="This system value controls the maximum number of characters in a password." />
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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="qpwdmaxlen" />
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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>Maximum length of passwords</title>
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</head>
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<body id="qpwdmaxlen"><a name="qpwdmaxlen"><!-- --></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">Maximum length of passwords</h1>
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<div><p>This system value controls the maximum number of characters in
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a password.</p>
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<p>Controlling the maximum length of passwords provides additional security
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by preventing users from specifying passwords that are too long and have to
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be recorded somewhere because they cannot be easily remembered. Some communications
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networks require a password that is 8 characters or less. Use this system
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value to ensure that passwords meet the requirements of your network.</p>
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<p>See <a href="#qpwdmaxlen__quickref">Quick reference</a> table
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for an overview of the maximum length of passwords 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 maximum length of passwords
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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 ">Maximum length</td>
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<td valign="top" headers="d0e33 "><em>maximum-number-of-characters</em></td>
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<td valign="top" headers="d0e35 ">Specify the maximum number of characters for a password.</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 the maximum number of characters that a valid password contains.
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This system value works with the minimum length of password system value to
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provide a range for the length of passwords. Valid passwords must be within
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that length range. Remember that the length of passwords is dependant on the
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system value for password level. Although you may not want to disclose the
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password level to system users, you will want to document the length of passwords
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that the password level allows. For example, if you set your password level
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at 3, users would need to know that their passwords could be in a range of
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1 to 128 characters.</p>
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<div class="p">
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<div class="tablenoborder"><a name="qpwdmaxlen__quickref"><!-- --></a><table cellpadding="4" cellspacing="0" summary="" id="qpwdmaxlen__quickref" frame="border" border="1" rules="all"><caption>Table 2. Quick Reference. Provides details
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for the maximum length of passwords system value.</caption><thead align="left"><tr valign="bottom"><th valign="bottom" id="d0e64">iSeries Navigator name</th>
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<th valign="bottom" id="d0e68">Maximum length</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e64 ">Character-based interface name</td>
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<td valign="top" headers="d0e68 ">QPWDMAXLEN</td>
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</tr>
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<tr><td valign="top" headers="d0e64 ">Authority</td>
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<td valign="top" headers="d0e68 "><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="d0e64 ">How to access</td>
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<td valign="top" headers="d0e68 "><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>Validation</strong> page, you will find the options for password
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length.</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 QPWDMAXLEN</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="d0e64 ">Changes take effect</td>
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<td valign="top" headers="d0e68 ">Immediately</td>
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</tr>
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<tr><td valign="top" headers="d0e64 ">Default value</td>
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<td valign="top" headers="d0e68 ">6</td>
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</tr>
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<tr><td valign="top" headers="d0e64 ">Recommended value</td>
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<td valign="top" headers="d0e68 ">This value depends on what you selected for password
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level.</td>
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</tr>
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<tr><td valign="top" headers="d0e64 "><a href="rzamvlockdown.htm">Lockable</a></td>
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<td valign="top" headers="d0e68 ">Yes</td>
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</tr>
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<tr><td valign="top" headers="d0e64 ">Special considerations </td>
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<td valign="top" headers="d0e68 ">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,
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"Security System Values" in <a href="../books/sc415302.pdf" target="_blank">Security 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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