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OCI Linux: Intermittent User Lookup Failure For Local or Remote Users While Using AD Authentication

edited Jan 25, 2023 2:42PM in Linux

Applies to:

Oracle Cloud Infrastructure - Version N/A and later 

Linux x86-64


Symptoms

Oracle Linux server integrated with AD user is experiencing slow latency and connection failure in USER,GROUP lookup for Local and Remote User(AD).


Cause

/etc/sssd/sssd.conf file is set with enumerate=true parameter and it is resource intensive operation because it will read and display all the values attributes of a particular user or group.

Enumerating all entries has a negative impact on the server load and performance at the client. 


Solution

Disable enumeration in /etc/sssd/sssd.conf file because applications do not always require a complete set of users or groups and will request information about specific users or groups.

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