88 lines
5.4 KiB
HTML
88 lines
5.4 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" 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="dc.language" scheme="rfc1766" 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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<meta name="dc.date" scheme="iso8601" content="2005-09-06" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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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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<title>Directory Server (LDAP) - Access control lists</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="rzahyacl"></a>
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<h3 id="rzahyacl">Access control lists</h3>
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<p>Access control lists (ACLs) provide a means to protect information stored
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in a LDAP directory. Administrators use ACLs to restrict access to different
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portions of the directory, or specific directory entries. Changes to each
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entry and attribute in the directory can be controlled by using ACLs. An ACL
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for a given entry or attribute can be inherited from its parent entry or can
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be explicitly defined.</p>
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<p>It is best to design your access control strategy by creating groups of
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users that you will use when setting the access for objects and attributes.
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Set ownership and access at the highest level in the tree possible and let
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the controls inherit down the tree.</p>
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<p>The operational attributes associated with access control, such as entryOwner,
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ownerSource, ownerPropagate, aclEntry, aclSource and aclPropagate are unusual
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in that they are logically associated with each object, but can have values
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that depend on other objects higher in the tree. Depending on how they are
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established, these attribute values can be explicit to an object or inherited
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from an ancestor.</p>
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<p>The access control model defines two sets of attributes: the Access Control
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Information (ACI) and the entryOwner information. The ACI defines the access
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rights given to a specified subject with respect to the operations they can
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perform on the objects to which they apply. The aclEntry and aclPropagate
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attributes apply to the ACI definition. The entryOwner information defines
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which subjects can define the ACI for the associated entry object. The entryOwner
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and ownerPropagate attributes apply to the entryOwner definition.</p>
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<p>There are two kinds of access control lists that you can choose from: filter-based
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ACLs and non-filtered ACLs. Non-filtered ACLs apply explicitly to the directory
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entry that contains them, but can be propagated to none, or all of its descendant
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entries. Filter-based ACLs differ in that they employ a filter-based comparison,
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using a specified object filter, to match target objects with the effective
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access that applies to them.</p>
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<p>Using ACLs, administrators can restrict access to different portions of
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the directory, specific directory entries and, based on the attribute name
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or attribute access class, the attributes contained in the entries. Each
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entry within the LDAP directory has a set of associated ACI. In conformance
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with the LDAP model, the ACI and entryOwner information is represented as
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attribute-value pairs. Furthermore, the LDIF syntax is used to administer
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these values. The attributes are: </p>
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<ul>
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<li>aclEntry</li>
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<li>aclPropagate</li>
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<li>ibm-filterAclEntry</li>
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<li>ibm-filterAclInherit</li>
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<li>entryOwner</li>
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<li>ownerPropagate</li></ul>
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<p>For information about how to work with ACLs, see <a href="rzahywac-pi.htm#rzahywac-pi">Manage access control lists (ACLs)</a>.
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For additional information, see the following:</p>
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<ul>
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<li><a href="rzahyfilteracls.htm#rzahyfilteracls">Filtered ACLs</a></li>
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<li><a href="rzahyaclasyn.htm#rzahyaclasyn">The access control attribute syntax</a></li>
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<li><a href="rzahyaclentry.htm#rzahyaclentry">AclEntry and ibm-filterAclEntry</a></li>
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<li><a href="rzahyentryowner.htm#rzahyentryowner">EntryOwner</a></li>
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<li><a href="rzahypropagation.htm#rzahypropagation">Propagation</a></li>
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<li><a href="rzahyaccesseval.htm#rzahyaccesseval">Access evaluation</a></li>
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<li><a href="rzahydefaci.htm#rzahydefaci">Define the ACIs and entry owners</a></li>
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<li><a href="rzahymodaci.htm#rzahymodaci">Change the ACI and entry owner values</a></li>
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<li><a href="rzahydelaci.htm#rzahydelaci">Delete the ACI/entry owner values</a></li>
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<li><a href="rzahyretaci.htm#rzahyretaci">Retrieve the ACI/entry owner values</a></li>
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<li><a href="rzahysubtree.htm#rzahysubtree">Subtree replication considerations</a></li></ul>
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<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
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</body>
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</html>
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