LDAP URLs in the userdn Keyword

The userdn keyword can also be expressed as an LDAP URL with a filter, by using this syntax:

userdn = ldap:///suffix??sub?(filter)

LDAP URLs always apply to the local server. Do not specify a hostname or port number within an LDAP URL.

The following ACI on the dc=example,dc=com node allows all users in the accounting and engineering branches of the example.com tree to access to the targeted resource dynamically based on the following URL

userdn = "ldap:///dc=example,dc=com??sub?(|(ou=eng)(ou=acct))"

LDAP URLs can be used with the logical OR operator and the not-equal operator as shown in the following examples.

Example 2–5 Using the userdn Keyword With a Logical OR Operator in LDAP URLs

This bind rule is evaluated to be true for users that bind with either of the specified DN patterns.

userdn = "ldap:///uid=b*,c=example.com || ldap:///cn=b*,dc=example,dc=com";

Example 2–6 Using the userdn Keyword With a Not-Equal Operator in LDAP URLs

This bind rule is evaluated to be true if the client is not binding as a UID-based DN in the accounting subtree. This bind rule only makes sense if the targeted entry is not under the accounting branch of the directory tree.

userdn != "ldap:///uid=*,ou=Accounting,dc=example,dc=com";