[Samba] NT_STATUS_PROTOCOL_UNREACHABLE

[Christian Naumer]

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