Glossary
- access control
Control to grant or to deny access to a resource.
- access control instruction (ACI)
An instruction or rule that can be used to grant or deny access to users to perform operations on a server.
- access control list (ACL)
A list connecting a user or group of users to one or more security entitlements.
- access log
A server log tracing the operations the server processes including timestamps, connection information, and information about the operation itself.
- account lockout
The act of making an account temporarily or permanently inactive after successive authentication failures.
- active user
A user with valid credentials and the ability to authenticate and use the services.
- approximate index
Matches values that sound like those provided in the filter.
- attribute value assertion (AVA)
An attribute description and a matching rule assertion value for the attribute used to determine whether an entry matches the assertion.
- audit log
A server access log with changes in LDIF format.
- authentication
The act of confirming the identity of a principal.
- authorization
The act of determining whether to grant or deny a user access to a resource.
- backend
A repository to store directory data. Different implementations with different capabilities exist.
- branch
The distinguished name of a non-leaf entry in the Directory Information Tree and its subordinates.
- certificate authority (CA)
An entity that issues digital certificates.
- change sequence number (CSN)
An opaque string uniquely identifying a single change to directory data and when it occurred.
- collective attribute
A standard mechanism for defining attributes on all the entries in a particular subtree.
- database cache
Memory space set aside for database content.
- directory information tree (DIT)
A set of directory entries organized hierarchically in a tree structure.
- directory server agent (DSA)
A single directory server.
- directory superuser (superuser)
An account with full administration privileges to bypass access control evaluation, change access controls, and change administrative privileges. Analogous to the Linux root and Windows Administrator accounts.
- distinguished name (DN)
A name uniquely identifying an object within the hierarchy of a directory tree.
- DSA-specific entry (DSE)
An entry holding information for use by the directory, not returned in searches by default.
- dynamic group
A group specifying members with LDAP URLs.
- elapsed time (etime)
Time to process a request, starting from the moment a worker thread can process the decoded operation.
- entry
An object in the directory having one of more object classes and their attributes.
- entry cache
Memory space set aside for frequently accessed, large entries.
- equality index
Matches values that correspond exactly, optionally for case sensitivity, to those provided in the filter.
- errors log
A server log tracing server events, error conditions, and warnings, categorized and identified by severity.
- export
Save directory data to an LDIF file.
- extensible match index
Matches with a matching rule like generalized time other than approximate, equality, ordering, presence, substring or VLV.
- generation ID
An initial state identifier for a replication base DN based on the first 1000 entries.
- HDAP gateway
A standalone HDAP web application.
- HTTP directory access protocol (HDAP)
The DS feature providing REST APIs and HTTP access to directory data.
- import
Read in and index directory data from an LDIF file.
- inactive user
A user who can’t authenticate or use the services.
- index
A backend feature for quick entry lookup based on attribute values.
- index entry limit
The maximum number of entries listed for an index key, beyond which the server stops maintaining the list for that key.
- LDAP abandon operation (abandon)
Stop processing a request in progress and drop the connection without a reply to the client application.
- LDAP add operation (add)
Adds a new entry or entries to the directory.
- LDAP anonymous bind operation (anonymous bind)
Simple authentication with an empty DN and an empty password, allowing anonymous access like reading public information.
- LDAP attribute (attribute)
A property of a directory entry, stored as one or more key-value pairs.
- LDAP bind operation (bind)
Authenticates the client application. The server uses the identity to make authorization decisions.
- LDAP compare operation (compare)
Compares a specified attribute value with the value stored on an entry in the directory.
- LDAP control (control)
An addition to an LDAP message to specify how to process the operation.
- LDAP Data Interchange Format (LDIF)
An IETF standard file format for representing LDAP directory content and modifications to directory content. Typically used to import and export LDAP-based directory information.
- LDAP delete operation (delete)
Removes an existing entry or entries from the directory.
- LDAP extended operation (extended operation)
An LDAP operation not included in the original standards.
- LDAP group (group)
An entry identifying a set of member entries in the directory.
- LDAP modify DN operation (rename)
Changes the distinguished name of an entry.
- LDAP modify operation (modify)
Changes one or more attributes of an entry.
- LDAP operational attribute (operational attribute)
An attribute with a special, operational meaning for the server, not returned in searches by default.
- LDAP schema (schema)
Definitions of object classes, attributes types, attribute value syntaxes, matching rules, and other constrains on entries.
- LDAP search filter (filter)
An expression the server uses to find entries matching a search request.
- LDAP search operation (search)
Return entries based on an LDAP filter, a base DN, and a scope.
- LDAP static group (static group)
An entry enumerating member entries.
- LDAP subentry (subentry)
An entry residing with user data but holding operational data, not returned in searches by default.
- LDAP unbind operation (unbind)
Release resources at the end of a session.
- LDAP Uniform Resource Locator (LDAP URL)
A standard uniform resource locator for accessing entries in a directory.
- LDAP user attribute (user attribute)
An attribute for storing user or application data on a directory entry.
- LDAP virtual attribute (virtual attribute)
An attribute with dynamically generated values not persistently stored in the backend.
- LDAP virtual static group (virtual static group)
An entry representing dynamic groups as static groups.
- LDAPS
LDAP over TLS.
- Lightweight Directory Access Protocol (LDAP)
An open, cross-platform protocol used for interacting with directory services.
- matching rule
A rule for matching operations against assertion values, associated with attribute syntaxes.
- naming context
A base DN under which client applications can look for user data.
- object identifier (OID)
A hierarchical string of digits and dots to uniquely identify an object.
- ordering index
Matches values for a filter that specifies a range.
- password policy
A set of rules for sequence of characters constituting an acceptable password.
- password reset
Password change performed by a user other than the user who owns the entry.
- password storage scheme
A mechanism for encoding user passwords stored on directory entries.
- password validator
A mechanism to accept or reject a proposed password.
- presence index
Matches when an attribute’s present on the entry, regardless of the value.
- principal
Represents a successfully authenticated entity, such as a user, a device, or an application.
- privilege
A server setting controlling access to an administrative operation.
- referential integrity
The act of ensuring group membership remains consistent following changes to member entries.
- referint log
A server log tracing referential integrity events, with entries similar to the errors log.
- referral
A reference to another directory location where the server can process the current operation.
- relative distinguished name (RDN)
The initial portion of a DN distinguishing the entry from all others at the same level.
- replica
A directory server configured to use replication.
- replication
Data synchronization to ensure all participating servers eventually share a consistent set of directory data.
- root DSA-specific entry (root DSE)
The entry with an empty string DN ("") exposing information about the directory server itself.
- simple authentication
Bind with a user’s entry DN and password.
- substring index
Matches values specified with wildcards in the filter.
- suffix
The DN of a root entry in the DIT and all its subordinate entries taken together as a single object of administrative tasks.
- task
A mechanism for remote access to server administrative actions.
- unindexed search
A search operation for which the server has no appropriate index.
- virtual list view index (VLV index)
Matches browsing requests for paging through a long list of results.
- X.500 directory standards (X.500)
A family of standardized protocols for accessing, browsing, and maintaining a directory, predating LDAP.