Bind Rules; Setting Permissions; The Precedence Rule - Red Hat DIRECTORY SERVER 8.1 - DEPLOYMENT Deployment Manual

Chapter 8. Designing a Secure Directory
Permission
Proxy

8.7.1.3. Bind Rules

The bind rule usually indicates the bind DN subject to the permission. It can also specify bind
attributes such as time of day or IP address.
Bind rules easily express that the ACI applies only to a user's own entry. This allows users to update
their own entries without running the risk of a user updating another user's entry.
Bind rules indicate that the ACI is applicable in specific situations:
• Only if the bind operation is arriving from a specific IP address or DNS hostname. This is often used
to force all directory updates to occur from a given machine or network domain.
• If the person binds anonymously. Setting a permission for anonymous bind also means that the
permission applies to anyone who binds to the directory as well.
• For anyone who successfully binds to the directory. This allows general access while preventing
anonymous access.
• Only if the client has bound as the immediate parent of the entry.
• Only if the entry as which the person has bound meets a specific LDAP search criteria.
The Directory Server provides several keywords to more easily express these kinds of access:
• Parent. If the bind DN is the immediate parent entry, then the bind rule is true. This means that
specific permissions can be granted that allow a directory branch point to manage its immediate
child entries.
• Self. If the bind DN is the same as the entry requesting access, then the bind rule is true. Specific
permission can be granted to allow individuals to update their own entries.
• All. The bind rule is true for anyone who has successfully bound to the directory.
• Anyone. The bind rule is true for everyone. This keyword is used to allow or deny anonymous
access.

8.7.2. Setting Permissions

By default, all users are denied access rights of any kind, with the exception of the Directory Manager.
Consequently, some ACIs must be set for the directory for users to be able to access the directory.
For information about how to set ACIs in the directory, refer to the Red Hat Directory Server
Administrator's Guide.

8.7.2.1. The Precedence Rule

When a user attempts any kind of access to a directory entry, Directory Server examines the access
control set in the directory. To determine access, Directory Server applies the precedence rule. This
128
Description
Indicates that the user can use any other
DN, except Directory Manager, to access the
directory with the rights of this DN.