133 lines
7.5 KiB
HTML
133 lines
7.5 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 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 signon attempts" />
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<meta name="abstract" content="The maximum signon attempts system value limits the number of consecutive incorrect signon attempts by local and remote users." />
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<meta name="description" content="The maximum signon attempts system value limits the number of consecutive incorrect signon attempts by local and remote users." />
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<meta name="DC.Relation" scheme="URI" content="rzamvplansyslvlsec.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="qmaxsign" />
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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 signon attempts</title>
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</head>
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<body id="qmaxsign"><a name="qmaxsign"><!-- --></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 signon attempts</h1>
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<div><p>The maximum signon attempts system value limits the number of consecutive
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incorrect signon attempts by local and remote users.</p>
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<p>Incorrect signon attempts can be caused by incorrect user identification,
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incorrect password, or inadequate authority to the device. The maximum signon
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attempts system value works with the system value that specifies the action
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the system takes when the maximum number of signon attempts is reached. For
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information on this related system value, see <a href="rzamvqmaxsignacn.htm">Maximum sign on attempts action</a>.</p>
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<p>Some hackers may attempt to break into systems by guessing passwords. By
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limiting the number of signon attempts you allow, you limit their guesses.
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The maximum signon attempts system value determines how many signon tries
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you allow. Generally you want to set the value high enough to avoid frustrating
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users but also low enough to prevent a potential intruder too many guesses.
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Typically setting the value for signon attempts between 3 and 5 fulfills both
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of these requirements.</p>
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<p>See <a href="#qmaxsign__quickref">Quick reference</a> table
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for an overview of the maximum signon attempts 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 use maximum signon attempts
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system value</caption><thead align="left"><tr valign="bottom"><th valign="bottom" id="d0e34">iSeries™ Navigator</th>
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<th valign="bottom" id="d0e38">Character-based interface</th>
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<th valign="bottom" id="d0e40">Description</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e34 ">No maximum</td>
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<td valign="top" headers="d0e38 ">*NOMAX</td>
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<td valign="top" headers="d0e40 ">The system allows an unlimited number of incorrect signon
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attempts. This value gives a potential intruder unlimited opportunities to
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guess a valid user ID and password combination.</td>
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</tr>
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<tr><td valign="top" headers="d0e34 ">Maximum number</td>
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<td valign="top" headers="d0e38 "><em>limit</em></td>
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<td valign="top" headers="d0e40 ">Specify a value from 1 through 25. The recommended number
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of signon attempts is three. Usually three attempts are enough to correct
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typing errors but low enough to help prevent unauthorized access.</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><span class="uicontrol">Relationship to security policy</span></p>
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<p>Within your security policy you should inform users your company's expectations
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for managing their signon activities. It is important to document the number
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of signon attempts that users are allowed and the action taken when that number
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is exceeded.</p>
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<div class="p">
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<div class="tablenoborder"><a name="qmaxsign__quickref"><!-- --></a><table cellpadding="4" cellspacing="0" summary="" id="qmaxsign__quickref" frame="border" border="1" rules="all"><caption>Table 2. Quick Reference. Provides details
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for the maximum signon attempts system value.</caption><thead align="left"><tr valign="bottom"><th valign="bottom" id="d0e74">iSeries Navigator name</th>
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<th valign="bottom" id="d0e78">Incorrect signon attempts</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e74 ">Character-based interface name</td>
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<td valign="top" headers="d0e78 ">QMAXSIGN</td>
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</tr>
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<tr><td valign="top" headers="d0e74 ">Authority</td>
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<td valign="top" headers="d0e78 "><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="d0e74 ">How to access</td>
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<td valign="top" headers="d0e78 "><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 <span class="uicontrol">Signon Policy</span> and select <span class="uicontrol">Properties</span>.</li>
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<li>On the <span class="uicontrol">General</span> page, you will find the option for
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maximum signon attempts.</li>
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</ol>
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</div>
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<div class="p"><span class="uicontrol">Character-based interface</span><ol><li>In the character-based interface, type <samp class="codeph">WRKSYSVAL QMAXSIGN</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="d0e74 ">Changes take effect</td>
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<td valign="top" headers="d0e78 ">Immediately</td>
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</tr>
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<tr><td valign="top" headers="d0e74 ">Default value</td>
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<td valign="top" headers="d0e78 ">3</td>
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</tr>
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<tr><td valign="top" headers="d0e74 ">Recommended value</td>
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<td valign="top" headers="d0e78 ">3</td>
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</tr>
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<tr><td valign="top" headers="d0e74 "><a href="rzamvlockdown.htm">Lockable</a></td>
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<td valign="top" headers="d0e78 ">Yes</td>
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</tr>
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<tr><td valign="top" headers="d0e74 ">Special considerations</td>
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<td valign="top" headers="d0e78 ">See <a href="rzamvqmaxsignacn.htm">Maximum sign on attempts action</a> for special considerations
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regarding this system value.</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 detailed 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="rzamvplansyslvlsec.htm" title="System security entails controlling user access and their privileges, maintaining information integrity, monitoring processes and access, auditing system functions, and providing backup and recovery of security related information.">Plan system security</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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