Use Spring Security LDAP for application users who need to sign in against OpenLDAP, and configure Camunda separately. The Camunda integration does not automatically make your Spring Boot app authenticate users through LDAP. First identify whether the application targets Camunda 7 or Camunda 8; their Spring Boot integrations are different. This guide focuses on the application-login and Camunda-client boundaries, with Windows treated as a development environment where Camunda 8 is concerned.
Decide what LDAP and Camunda each need to do
There are three distinct configuration owners. Keeping them separate makes both setup and troubleshooting clearer:
- Spring Security LDAP: verifies application usernames and passwords against the directory and, if configured, maps directory groups or other attributes to application authorities.
- Camunda integration: connects the application to the Camunda engine or cluster using the mechanism for the project’s Camunda generation.
- OpenLDAP: provides the directory, its schema, entries, network access, and TLS configuration.
Spring Security’s LDAP reference describes LDAP-based authentication as the mechanism used when Spring Security is configured to accept a username and password. With LDAP bind authentication, the application asks the directory to validate the credentials; the directory does not return the user’s password or password hash for the application to check locally. That is separate from connecting to Camunda APIs.
Choose the Camunda generation and compatible starter
Do not combine Camunda 7 and Camunda 8 artifact names or configuration. Select the integration for the version the application actually uses, then check its current compatibility guidance before adding dependencies.
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| Target | Camunda integration | What to verify |
|---|---|---|
| Camunda 7 | Use the Camunda 7 Spring Boot integration guide for the project’s engine version. | Confirm the guide and dependency versions match the Camunda 7 engine and Spring Boot versions in use. The Camunda 8 starter is not a substitute. |
| Camunda 8 | Use the official Camunda 8 Spring Boot Starter for Camunda API integration. | Camunda 8.9 documentation lists camunda-spring-boot-starter with Spring Boot 4.0.x and the separate camunda-spring-boot-3-starter with Spring Boot 3.5.x. Check the compatibility matrix for the exact versions being deployed. |
Camunda’s 8.9 guidance also says the Spring Zeebe SDK is to be removed in 8.10 and recommends migrating before upgrading to 8.10. Avoid beginning a new Camunda 8 integration on that deprecated path. Camunda reports that Spring’s open-source support for Spring Boot 3.5.x ended in June 2026; Camunda says it will maintain its Spring Boot 3 starter until the end of Spring Commercial support for Spring Boot 3.x. These are version- and date-sensitive statements, so recheck the official compatibility and support pages for your target release.
Add LDAP support for application sign-in
Spring Security documents spring-boot-starter-data-ldap and spring-security-ldap as LDAP dependencies for Spring Boot applications. Add the dependencies appropriate to the application’s Spring Boot and Spring Security dependency management; do not select a version by copying one from an unrelated Camunda generation or older example.
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Configure authentication and authority retrieval to fit the actual OpenLDAP directory. There is no universal user distinguished name (DN), search base, username filter, group attribute, or group layout that can safely be assumed. Before configuring Spring Security, obtain these details from the directory administrator:
- LDAP URL and the directory’s naming context or base DN.
- Whether the application will search for a user entry before binding, and which identity it is allowed to use for that search.
- The user search base and filter that match the directory’s entries.
- How groups or roles are represented, where they are stored, and which attributes or membership relationships should become application authorities.
- The TLS endpoint and certificate chain the application must trust.
Keep authentication and authorization distinct: successful LDAP authentication establishes that the directory accepted the user’s credentials; it does not by itself decide what that user may do in the application. Configure role or authority retrieval for the directory’s real group model, and verify the resulting authorities against the application’s access rules.
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Keep bind credentials and other secrets out of source-controlled configuration. Supply them through the secret-management mechanism appropriate to the deployment. Use secure LDAP transport for credentials and directory traffic. OpenLDAP’s installation guide lists TLS libraries among its prerequisites, while the Spring Security reference covers LDAP bind authentication; neither establishes one complete truststore recipe for every Windows JDK and server certificate setup. Configure and test certificate trust in the actual runtime rather than assuming a certificate will be trusted because it works in a browser.
Configure Camunda connectivity independently
For Camunda 8
Use the compatible Camunda 8 Spring Boot Starter to configure the application’s connection and authentication to the Camunda cluster. This is the Camunda-facing API integration layer. It does not configure Spring Security to authenticate web users against OpenLDAP, and LDAP credentials should not be treated as Camunda cluster credentials unless the chosen Camunda deployment explicitly defines such an arrangement.
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For Camunda 7
Follow the Camunda 7 Spring Boot integration documentation for the exact engine version. Keep its engine integration and configuration separate from the Spring Security LDAP configuration. Do not copy Camunda 8 client settings into a Camunda 7 application, or vice versa.
In either case, validate the two authentication paths independently: a user signing into the application is one identity flow; the application connecting to Camunda is another. A successful LDAP login does not prove that the Camunda endpoint is reachable or that the client is authorized.
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Plan the Windows and OpenLDAP runtime
Camunda’s current manual-install documentation says Windows and macOS are supported for development only, not production, and describes launching the Windows distribution with camunda.bat. This qualification concerns that Camunda 8 manual installation guidance; it is not a blanket statement that a Windows-hosted Spring Boot application cannot connect to a remote Camunda service. Confirm the support position for the precise Camunda product and deployment method you intend to run.
The OpenLDAP 2.6 installation guide surfaced for this topic documents a source-build workflow: obtain and extract source, configure prerequisites, build, test, and install using a Unix-style configure/make process. That guide does not establish a native Windows server installation recipe. Do not infer native Windows server support from the fact that a Java application runs on Windows.
For a Windows development workstation, a practical topology is often to run the application locally and connect it to a directory and Camunda environment hosted in runtimes supported by their respective deployment guidance. If OpenLDAP itself must run on Windows, first verify the exact server package or runtime you plan to use, along with persistence, networking, certificate handling, and operational support. The OpenLDAP installation guide cited here is not proof of a particular Windows packaging route.
Implement and test in a controlled order
- Record the versions and roles. Write down Camunda 7 or 8, the exact Camunda release, Spring Boot version, whether Windows is development or production, and whether LDAP is for app login or a product-specific Camunda feature.
- Verify the directory contract. Obtain the LDAP URL, search base, user lookup rules, group model, service/search identity requirements, and trusted certificate chain from the directory owner.
- Add Spring LDAP dependencies. Use Spring Security’s documented LDAP dependencies in versions compatible with the application’s Spring Boot stack.
- Configure and test user authentication. Start with one known directory user. Confirm the search finds the intended entry and that bind authentication succeeds without logging or exposing credentials.
- Configure authority mapping. Map the directory’s actual group or role representation, then test both a user who should receive an application authority and one who should not.
- Add the generation-appropriate Camunda integration. Select the Camunda 7 guide or the compatible Camunda 8 starter, and configure its own endpoint and client authentication.
- Test each path separately. Verify app login and authorization, then verify a Camunda API operation using the application’s Camunda connection. Test secure LDAP trust from the same Windows JDK/runtime that will run the app.
Troubleshoot the failing boundary
| Symptom | Check first |
|---|---|
| LDAP connection or bind fails | Check hostname, port, network reachability, TLS mode and certificate trust, then the search or bind identity and credentials. Separate a TLS handshake failure from an invalid user credential. |
| User is found but login fails | Check the configured search base and user filter against the directory entry, then confirm the bind is performed with the identity and credentials expected by the directory. |
| Login works but protected application access is denied | Inspect the authorities Spring Security actually retrieves and compare them with the application’s authorization rules. Confirm the directory’s group membership representation matches the configured mapping. |
| Application login works but Camunda calls fail | Investigate the Camunda endpoint, network route, generation-specific starter, client credentials, and Camunda-side permissions. The LDAP login result does not establish Camunda client authentication. |
| Camunda calls work but application login fails | Investigate Spring Security LDAP settings and directory connectivity separately; a working Camunda client does not validate the LDAP configuration. |
For Camunda 8, distinguish local development from a production installation when diagnosing Windows-related issues. For OpenLDAP, distinguish a reachable remote directory from a server process installed on the Windows host; the cited installation guide documents the latter only through its Unix-style source-build workflow.
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Camunda 8.7 Operate documentation describes a product-specific LDAP option enabled with the ldap-auth Spring profile and parameters such as LDAP URL, base DN, and manager DN. That configuration applies to the documented Operate feature; it is not a recipe for Spring Security authentication in an unrelated Spring Boot application, nor a universal configuration for every Camunda product or release.
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