[Samba] Printserver after latest MS updates

[Jeremy Allison]

On Tue, Oct 19, 2021 at 02:37:55PM +0200, cn--- via samba wrote:
>Hello you all,
>Microsoft is still trying to fix the PrintNightmare bugs. And after 
>the latest patch day we see lots of NTLMv2 auths on our printserver. 
>And _only_ on our printserver and not on any other member servers.
>
>It is not that Kerberos does not work. I can ssh into that machine 
>using Kerberos I can connect with smbclient with kerberos. Also the 
>logs are really spammed with those messages. And it all started after 
>we released the last patchday updates from MS.
>This is on RockyLinux with Samba Version 4.14.8 from Sernet. Also had 
>the same Problem on 4.14.7. smb.conf is below.
>Everything seems to work as expected. It just is the number of NTLMv2 
>auths that made me look at this more closely.

NTLM auths can happen when a machine isn't using name-based
lookups (i.e. not using DNS names). Kerberos requires name-based
lookups in order to get tickets. That's usually the cause of
NTLM.