[Solved] Given this rabbitmq.conf snippet:auth_backends.1 = ldap ldap.servers.1 = ldap.example.com ldap.... | RabbitMQ

RabbitMQ - Security and Operations

Given this rabbitmq.conf snippet:

auth_backends.1 = ldap
ldap.servers.1 = ldap.example.com
ldap.user_dn_pattern = cn=${username},ou=users,dc=example,dc=com

What happens when a user tries to log in with username alice?

ARabbitMQ denies login because user_dn_pattern is missing

BRabbitMQ uses local user database ignoring LDAP

CRabbitMQ checks LDAP server at ldap.example.com using DN 'cn=alice,ou=users,dc=example,dc=com'

DRabbitMQ tries OAuth authentication instead

Step-by-Step Solution

Solution:

Step 1: Analyze LDAP config parameters
The config sets LDAP as backend and defines server and user DN pattern with ${username} placeholder.
Step 2: Substitute username in DN pattern
For username 'alice', DN becomes 'cn=alice,ou=users,dc=example,dc=com'. RabbitMQ uses this to query LDAP server.
Final Answer:
RabbitMQ checks LDAP server at ldap.example.com using DN 'cn=alice,ou=users,dc=example,dc=com' -> Option C
Quick Check:
Username substitution in DN pattern = LDAP query [OK]

Quick Trick: User DN pattern uses ${username} to query LDAP [OK]

Common Mistakes:

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