How to Configure LDAP Authentication in Jenkins Quickly

To configure LDAP in Jenkins, go to Manage Jenkins > Configure Global Security, select LDAP as the security realm, and enter your LDAP server details like server URL, root DN, and user search base. Save the settings to enable Jenkins to authenticate users against your LDAP directory.

Syntax

In Jenkins, LDAP configuration is done through the web UI under Configure Global Security. The key fields are:

• Server: The LDAP server URL (e.g., ldap://ldap.example.com)
• Root DN: The base distinguished name to search users (e.g., dc=example,dc=com)
• User Search Base: Optional sub-tree for user search
• Manager DN and Manager Password: Credentials for LDAP bind if required
• Disable LDAP Email Resolver: Option to disable email lookup

These fields tell Jenkins how to connect and search your LDAP directory for user authentication.

text

Manage Jenkins > Configure Global Security > Security Realm > LDAP

Fields:
- Server: ldap://your-ldap-server
- Root DN: dc=example,dc=com
- User Search Base: ou=users
- Manager DN: cn=admin,dc=example,dc=com
- Manager Password: yourpassword
- Disable LDAP Email Resolver: false

Example

This example shows how to configure Jenkins to use an LDAP server at ldap://ldap.example.com with a root DN and manager credentials.

text

1. Open Jenkins dashboard.
2. Click on Manage Jenkins > Configure Global Security.
3. Under Security Realm, select LDAP.
4. Enter the following details:
   - Server: ldap://ldap.example.com
   - Root DN: dc=example,dc=com
   - User Search Base: ou=users
   - Manager DN: cn=admin,dc=example,dc=com
   - Manager Password: yourpassword
5. Save the configuration.
6. Test login with an LDAP user account.

Output

Jenkins saves the LDAP settings and uses them to authenticate users on login.

Common Pitfalls

Common mistakes when configuring LDAP in Jenkins include:

• Incorrect Server URL format (missing ldap:// or wrong port)
• Wrong Root DN or User Search Base causing no users found
• Not providing Manager DN and password when required by the LDAP server
• Firewall or network issues blocking Jenkins from reaching the LDAP server
• Not restarting Jenkins after configuration changes in some cases

Always verify LDAP connectivity and user search with tools like ldapsearch before configuring Jenkins.

text

Wrong example:
Server: ldap.example.com
Root DN: example,com

Right example:
Server: ldap://ldap.example.com
Root DN: dc=example,dc=com

Quick Reference

Field	Description	Example
Server	LDAP server URL	ldap://ldap.example.com
Root DN	Base DN for user search	dc=example,dc=com
User Search Base	Subtree for users	ou=users
Manager DN	Bind user DN	cn=admin,dc=example,dc=com
Manager Password	Bind user password	yourpassword
Disable LDAP Email Resolver	Disable email lookup	false

Key Takeaways

Configure LDAP in Jenkins under Manage Jenkins > Configure Global Security > Security Realm.

Provide correct LDAP server URL, Root DN, and optionally Manager DN and password.

Test LDAP connectivity and user search before applying settings.

Common errors include wrong DN formats and missing bind credentials.

Save and apply settings to enable LDAP authentication in Jenkins.