SOLVED Unserstand Warning message: "The following system core files were found: smbd.core."

[pcace]

Hey there,

i am new to TrueNAS, just finished setting up the system and now after a couple of days i got this warning message (i did get this a couple days ago, and now again):

Current alerts:
* The following system core files were found: smbd.core. Please create a ticket at https://jira.ixsystems.com/and attach the relevant core files along with a system debug. Once the core files have been archived and attached to the ticket, they may be removed by running the following command in shell: 'rm /var/db/system/cores/*'.
* 11214 SSH login failures:
Jan 14 00:04:49 hugo 1 2022-01-14T00:04:49.959484+01:00 hugo.local sshd 9608 - - Invalid user pi from 164.177.68.149 port 39407
Jan 14 00:04:49 hugo 1 2022-01-14T00:04:49.996115+01:00 hugo.local sshd 9609 - - Invalid user pi from 164.177.68.149 port 23935
... 11210 more ...
Jan 14 19:43:12 hugo 1 2022-01-14T19:43:12.541878+01:00 hugo.local sshd 3207 - - Failed password for root from 45.88.137.100 port 20736 ssh2
Jan 14 19:43:12 hugo 1 2022-01-14T19:43:12.553957+01:00 hugo.local sshd 3208 - - Failed password for root from 45.88.137.100 port 20792 ssh2

What does that SMB warning mean? What is a core file?

The SSH warnings are understandable, but annoying. Is there anything like fail2ban in TrueNAS?

Thank you so much,

Pcace

EDIT: the NAS is reachable from outside via SSH/22, root login is disabled.

 

[Redcoat]

See this thread https://www.truenas.com/community/threads/truenas-12-0-u2-now-available.90964/ starting at post#10.