VA-003 Compare authentication methods Practice Question
An organization previously used userpass auth and is migrating to LDAP auth. After enabling LDAP and configuring the bind user, users can authenticate but their policies do not apply. What is the most likely cause?
⚠ Common exam trap
Candidates often assume successful authentication automatically grants permissions, but in Vault, authentication and authorization are decoupled — LDAP only verifies identity, and group-to-policy mapping is a separate configuration step that is easy to overlook.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
LDAP groups are not mapped to Vault policies
When users can authenticate but policies do not apply, it indicates that authentication itself is working (LDAP bind succeeded), but Vault has no way to associate the authenticated user with the correct policies. In Vault, LDAP authentication relies on group membership mapping: the LDAP server returns the user's groups, and Vault must have those groups mapped to Vault policies via `vault write auth/ldap/groups/<group_name> policies=<policy_name>`. Without this mapping, the user authenticates but receives no policies, resulting in an empty token with no permissions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The bind credentials are incorrect
Why it's wrong here
Correct bind credentials are needed for login to work.
- ✗
The userpass auth method is still enabled
Why it's wrong here
Multiple auth methods can coexist; the issue is policy application.
- ✓
LDAP groups are not mapped to Vault policies
Why this is correct
Users authenticate but need group-policy mapping to have permissions.
- ✗
The LDAP server is unreachable
Why it's wrong here
Authentication succeeded, so the server is reachable.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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