Bug ID 805417: Unable to enable LDAP system auth profile debug logging

Last Modified: Jul 12, 2023

Affected Product(s):
BIG-IP TMOS(all modules)

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,

Fixed In:
16.0.0, 15.1.1,

Opened: Jul 15, 2019

Severity: 2-Critical


Beginning in version 14.1.0, LDAP debugging must be performed on nslcd logs and not pam_ldap logs; however, it is not possible to enable debug logging on nslcd via the configuration file.


LDAP system authentication 'debug' parameter does not provide sufficient levels of debug logs, but there is no functional impact to normal system operation.


This would be encountered only if you (or F5 Support) wanted to do troubleshooting of LDAP connections by enabling debug logging.


To enable debug logging and have the system post log messages to the SSH/console window, start the nslcd process with -d option, which causes nslcd to run in the foreground until you press control-c to stop it: systemctl stop nslcd nslcd -d Note: The -d setting does not persist, so each time you want to log debug output, you must complete this procedure. You can increase the amount of debug output by specifying additional -d options (up to 3), e.g., '-ddd' or '-d -d -d'. When done, stop nslcd with control-c, and then restart it with the default options via the normal systemctl daemon: systemctl start nslcd

Fix Information

The nslcd logs are now visible on /var/log/secure file.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips