Disc lock up on 8.0-STABLE
Ivan Voras
ivoras at freebsd.org
Mon Dec 28 02:22:18 UTC 2009
Pete French wrote:
> Interesting... I just got another hard lock on the system, not at 3am
> this time. The only other common factor in this is that the lockup
> is always preceeded by a flood of failed ssh logins. I;m sure we've
> all seen these - I get them on every BSD system I have - they look
> like this:
>
> Dec 22 17:37:10 turpentine sshd[8188]: error: PAM: authentication error for illegal user kevin from 61.74.75.43
> Dec 22 17:43:21 turpentine sshd[9983]: error: PAM: authentication error for illegal user kevin from 58.60.106.24
> Dec 22 17:49:30 turpentine sshd[11781]: error: PAM: authentication error for illegal user kevin from 219.234.95.164
> Dec 22 18:01:47 turpentine sshd[15435]: error: PAM: authentication error for illegal user kevin from 61.74.75.43
> Dec 22 18:07:54 turpentine sshd[17259]: error: PAM: authentication error for illegal user kevin from 61.74.75.43
> Dec 22 18:14:06 turpentine sshd[19282]: error: PAM: authentication error for illegal user kevin from 61.74.75.53
>
> Theres always a flood of those on the console immediately preceeding
> the lockup. So this time it cant have been anything to do with the
> 3am run.
When you say "lock up" and "can't login" (in your original mail) - are
you sure this really is a lockup and not e.g. sshd dieing because of the
attacks? E.g. can you ping the machine, can you leave something like
"date >> /root/run.txt && vmstat 1 3 >> /root/run.txt" in crontab so you
track the moment it dies more closely?
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