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Lightweight directory access protocol (LDAP) is a protocol that helps applications to query user information from directory services/databases in a highly-secure way. To verify and authenticate any user who logs into the target ADC appliance, administrators create and enable one or more LDAP authentication servers and bind them with LDAP policies. When a user logs into the ADC appliance, he/she enters only the username and password. The ADC appliance will then loop through each of the LDAP policies bound with the LDAP servers in priority order and verify the user details with the Active Directory to authenticate his/her access. If an authentication server is down or not enabled, then, the user's information cannot be verified with the Active Directory where the user informartion is stored. This will deprive the users access to the ADC appliance and, sometimes, may completely block the users from logging in to the applaince in future. This is why, administrators should continuously monitor whether the LDAP authentication is enabled or not on the ADC appliance. The LDAP Authentication Servers test helps administrators in this regard!

This test auto-discovers the LDAP authentication servers, and reports whether for each LDAP server is enabled or not. This way, administrators can know if the user login failed due to LDAP authentication failure.

Outputs of the test: One set of results for each LDAP authentication server on the ADC appliance being monitored.

Measurement

Description

Measurement Unit

Interpretation

Is_auth_enabled

Indicates whether this LDAP Authentication Server is enabled or not.

The numeric values that correspond to these measure values have been given in the table below:

Measure Value	Numeric Value
Yes	1
No	0

Note:

By default, the measure reports the Measure Values listed in the table above to indicate the availability of the remote license server. However, in the graph of this measure, the same will be represented using the numeric equivalents only.