Bug ID 1166449: APM - NTLM authentication will stop working if any of DC FQDN is not resolvable in the configured DC list

Last Modified: Jan 19, 2023

Bug Tracker

Affected Product:  See more info
BIG-IP APM(all modules)

Known Affected Versions:
15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,

Opened: Oct 03, 2022
Severity: 3-Major


NTLM authentication will stop working.


NTLM authentications targeted towards this NTLM Auth Config will start to fail.


If any of the DC FQDN is not resolvable in the configured NTLM Auth Config DC list during below scenarios: - Create/Modify NTLM Auth Configuration - Restart ECA/NTLM service - Restart, Power cycle or after upgrade - Active/Stand by switch over.


User need to remove the non-resolvable DC FQDN from the NTLM Auth configuration's DC list.

Fix Information


Behavior Change