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LDAP
conceptDirectory Protocol
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Overview
Developed byUniversity of Michigan
Maintained byInternet Engineering Task Force
Founded1993
LicenseOpen Standard
Use casedirectory services authentication and authorization
Knowledge graph stats
Claims44
Avg confidence96%
Avg freshness99%
Last updatedUpdated 5 days ago
WikidataQ188244
Trust distribution
100% unverified
Governance
Not assessed
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LDAP

concept

Lightweight Directory Access Protocol for accessing and maintaining distributed directory information services.

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standard port

ValueTrustConfidenceFreshnessSources
389○UnverifiedHighFresh1

uses port

ValueTrustConfidenceFreshnessSources
389 (standard), 636 (SSL/TLS)○UnverifiedHighFresh1
389○UnverifiedHighFresh1

primary use case

ValueTrustConfidenceFreshnessSources
directory services authentication and authorization○UnverifiedHighFresh1
directory services and authentication○UnverifiedHighFresh1
Directory service protocol for accessing and maintaining distributed directory information○UnverifiedHighFresh1
Directory services authentication and information lookup○UnverifiedHighFresh1

secure port

ValueTrustConfidenceFreshnessSources
636○UnverifiedHighFresh1

supports protocol

ValueTrustConfidenceFreshnessSources
TCP/IP○UnverifiedHighFresh1
LDAPS (LDAP over SSL/TLS)○UnverifiedHighFresh1
SSL/TLS○UnverifiedHighFresh1
TLS○UnverifiedHighFresh1
SASL○UnverifiedHighFresh1

standard defined by

ValueTrustConfidenceFreshnessSources
IETF○UnverifiedHighFresh1

default port

ValueTrustConfidenceFreshnessSources
389○UnverifiedHighFresh1

maintained by

ValueTrustConfidenceFreshnessSources
Internet Engineering Task Force○UnverifiedHighFresh1
IETF○UnverifiedHighFresh1

secure version uses port

ValueTrustConfidenceFreshnessSources
636○UnverifiedHighFresh1

standardized by

ValueTrustConfidenceFreshnessSources
Internet Engineering Task Force (IETF)○UnverifiedHighFresh1
Internet Engineering Task Force○UnverifiedHighFresh1

license type

ValueTrustConfidenceFreshnessSources
Open Standard○UnverifiedHighFresh1

supports authentication method

ValueTrustConfidenceFreshnessSources
Simple Authentication○UnverifiedHighFresh1
SASL○UnverifiedHighFresh1
Simple Authentication and Security Layer○UnverifiedHighFresh1

integrates with

ValueTrustConfidenceFreshnessSources
OpenLDAP○UnverifiedHighFresh1
Microsoft Active Directory○UnverifiedHighFresh1
Active Directory○UnverifiedHighFresh1
Apache Directory Server○UnverifiedHighFresh1

current version

ValueTrustConfidenceFreshnessSources
LDAPv3○UnverifiedHighFresh1

based on

ValueTrustConfidenceFreshnessSources
X.500 Directory Access Protocol○UnverifiedHighFresh1

protocol version

ValueTrustConfidenceFreshnessSources
LDAPv3○UnverifiedHighFresh1

uses protocol

ValueTrustConfidenceFreshnessSources
TCP/IP○UnverifiedHighFresh1

supports encryption

ValueTrustConfidenceFreshnessSources
TLS○UnverifiedHighFresh1
TLS/SSL○UnverifiedHighFresh1

supports authentication

ValueTrustConfidenceFreshnessSources
SASL○UnverifiedHighFresh1
Simple Authentication and Security Layer (SASL)○UnverifiedHighFresh1

alternative to

ValueTrustConfidenceFreshnessSources
X.500 DAP○UnverifiedHighFresh1
X.500 Directory Access Protocol○UnverifiedHighFresh1
NIS (Network Information Service)○UnverifiedModerateFresh1

developed by

ValueTrustConfidenceFreshnessSources
University of Michigan○UnverifiedHighFresh1

first version released

ValueTrustConfidenceFreshnessSources
1993○UnverifiedHighFresh1

first version year

ValueTrustConfidenceFreshnessSources
1993○UnverifiedHighFresh1

founded year

ValueTrustConfidenceFreshnessSources
1993○UnverifiedHighFresh1

competes with

ValueTrustConfidenceFreshnessSources
NIS (Network Information Service)○UnverifiedModerateFresh1

Alternatives & Similar Tools

X.500 DAP
alternative to
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X.500 Directory Access Protocol
alternative to
Compare →
NIS (Network Information Service)
alternative to
Compare →
NIS (Network Information Service)
competes with
Compare →

Commonly Used With

OpenLDAPMicrosoft Active DirectoryActive DirectoryApache Directory Server

Related entities

Graph Insights

14 entities depend on LDAP
CASSingle Sign-OnSAMLMulti-Factor AuthenticationFusionAuthPing IdentityKeycloakAuth0
View full impact analysis →
Claim count: 44Last updated: 4/5/2026Edit history