Bug ID 1930945: [APM][KERBEROS][NTLM FALLBACK] Kerberos Authentication fails post-upgrade to v17.5.0/v17.5.1 — “Profile '/Common/kerberos_auth_config_default' was not found” and ECA Crashes

Last Modified: Jun 28, 2025

Affected Product(s):
BIG-IP APM, Install/Upgrade(all modules)

Known Affected Versions:
17.5.0

Fixed In:
17.5.1

Opened: Apr 24, 2025

Severity: 1-Blocking

Symptoms

1.ECA process continuously restarts (SIGSEGV/crash). 2. /var/log/apm contains errors indicating missing Kerberos config and NTLM fallback.

Impact

1. Kerberos authentication fails, leading to unsuccessful proxy access for domain-joined users.

Conditions

1. kerberos usecase

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips