JenkinsHow-ToBeginner · 4 min read

How to Configure Security in Jenkins: Step-by-Step Guide

To configure security in Jenkins, go to Manage Jenkins > Configure Global Security, then enable Security Realm for user authentication and Authorization for access control. You can use built-in user database or external systems like LDAP, and set permissions to control who can do what.

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Syntax

Jenkins security configuration is done through the web interface under Manage Jenkins > Configure Global Security. Key parts include:

Security Realm: Defines how users log in (e.g., Jenkins own database, LDAP).
Authorization: Defines what logged-in users can do (e.g., Matrix-based security, Project-based Matrix).
CSRF Protection: Prevents cross-site request forgery attacks.
Agent-to-master Access Control: Controls communication between Jenkins agents and master.

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Manage Jenkins > Configure Global Security
  - Enable Security
  - Security Realm: Choose authentication method
  - Authorization: Choose access control strategy
  - Save changes

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Example

This example shows how to enable Jenkins own user database for authentication and use Matrix-based security for authorization.

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1. Open Jenkins dashboard.
2. Click on Manage Jenkins > Configure Global Security.
3. Check 'Enable security'.
4. Under 'Security Realm', select 'Jenkins’ own user database'.
5. Check 'Allow users to sign up' if you want new users to register.
6. Under 'Authorization', select 'Matrix-based security'.
7. Add users and assign permissions like 'Overall/Administer' or 'Job/Build'.
8. Click 'Save'.

Output

Security enabled with Jenkins own user database and matrix-based permissions set.

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Common Pitfalls

Common mistakes when configuring Jenkins security include:

Not enabling security at all, leaving Jenkins open to anyone.
Using 'Anyone can do anything' authorization, which defeats security.
Forgetting to add users to the matrix, causing them to have no access.
Not configuring CSRF protection, risking cross-site attacks.
Misconfiguring LDAP or external authentication causing login failures.

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Wrong:
Authorization: Anyone can do anything

Right:
Authorization: Matrix-based security
Add users with specific permissions

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Quick Reference

Setting	Description	Common Options
Security Realm	How users authenticate	Jenkins own user database, LDAP, SSO
Authorization	What users can do	Matrix-based security, Project-based Matrix, Logged-in users, Anyone
CSRF Protection	Prevents cross-site attacks	Enabled (recommended)
Agent-to-master Access Control	Controls agent communication	Enabled (recommended)

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Key Takeaways

Always enable security in Jenkins to protect your server.

Use Security Realm to choose how users log in, like Jenkins database or LDAP.

Use Matrix-based security to assign fine-grained permissions to users.

Enable CSRF protection to prevent cross-site request forgery attacks.

Test your security settings with a non-admin user to verify access.