[Samba] winbindd authentication fails with NT_STATUS_RPC_SEC_PKG_ERROR intermittently

Bharath Bheemarasetti bharath.bheemarasetti at gmail.com
Mon Jul 3 19:30:02 UTC 2023

Yes, I did reach out to Microsoft, yet to get a response from them. Does
not seem to be a problem with netlogon.exe process as authentication works
for the same user in another setup that is using the same DC at the time of

On Mon, Jul 3, 2023 at 9:32 PM Jeremy Allison <jra at samba.org> wrote:

> On Mon, Jul 03, 2023 at 01:10:26AM +0530, Bharath Bheemarasetti via samba
> wrote:
> >On further investigation, the error that shows up in packet capture is
> that
> >the DC is returning [Fault: nca_s_fault_sec_pkg_error] for the
> >NetrLogonSamLogonEx call. There are no error logs (or any logs) regarding
> >the netlogon call failure in the netlogon logs even after enabling debug
> >logs in the DC. One more interesting thing is restarting the netlogon.exe
> >service on the DC also fixes the issue temporarily similar to restarting
> >the smb service
> That sounds like netlogon.exe crashing in some way. Have you
> reported this to Microsoft ?

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