samba - Jan 2024 - NT_STATUS_PROTOCOL_UNREACHABLE

Hi everyone,
we are running Samba version 4.19.3 on Rocky Linux 8.9. Recently we have 
been seeing errors like these for all Linux hosts in our network.

Jan 11 15:36:55 dc4.REALM.COM samba[4339]: [2024/01/11 15:36:55.080863, 
2] ../../auth/auth_log.c:876(log_authentication_event_human_readable)
Jan 11 15:36:55 dc4.REALM.COM samba[4339]:   Auth: [Kerberos KDC,ENC-TS 
Pre-authentication] user [(null)]\[HOST$@REALM.COM] at [Thu, 11 Jan 2024 
15:36:55.080852 CET] with [aes256-cts-hmac-sha1-96] status 
[NT_STATUS_PROTOCOL_UNREACHABLE] workstation [(null)] remote host 
[ipv4:X.X.X.X:52874] mapped to [REALM-02]\[HOST$]. local host [NULL]



Has anybody got an idea? We don't notice anything not functioning until now.


Regards


Christian

----- Le 11 Jan 24, ? 15:47, Christian Naumer via samba samba at lists.samba.org
a ?crit :
> Hi everyone,
> we are running Samba version 4.19.3 on Rocky Linux 8.9. Recently we have
> been seeing errors like these for all Linux hosts in our network.
> 
> Jan 11 15:36:55 dc4.REALM.COM samba[4339]: [2024/01/11 15:36:55.080863,
> 2] ../../auth/auth_log.c:876(log_authentication_event_human_readable)
> Jan 11 15:36:55 dc4.REALM.COM samba[4339]:   Auth: [Kerberos KDC,ENC-TS
> Pre-authentication] user [(null)]\[HOST$@REALM.COM] at [Thu, 11 Jan 2024
> 15:36:55.080852 CET] with [aes256-cts-hmac-sha1-96] status
> [NT_STATUS_PROTOCOL_UNREACHABLE] workstation [(null)] remote host
> [ipv4:X.X.X.X:52874] mapped to [REALM-02]\[HOST$]. local host [NULL]
> 
> 
> 
> Has anybody got an idea? We don't notice anything not functioning until
now.
Noticed the same, and it's harmless. See
https://lists.samba.org/archive/samba/2023-September/246689.html

Regards,
Daniel

-- 
Daniel Berteaud