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Re: [sec] Re: failed root login attempts



On Tue, 28 Sep 2004 at 09:18:51PM -0400, Noah Meyerhans wrote:
> That doesn't seem to be the case.  The most common one uses
> root/test/guest, but there are more that seem to be based on the same
> code.  They all disconnect by sending the string "Bye Bye", e.g.:
> sshd[13613]: Received disconnect from 64.246.26.19: 11: Bye Bye
> 
> I've seen many more aggressive root login attempts, as well as 'admin'
> and a number of other users.
> 
> The somewhat unsetting thing that I'm wondering about is whether these
> machines are all sharing some big central password dictionary and are
> logging their attempted passwords to some central database.  It ends up
> being some massive distributed dictionary attack, which I doubt is going
> to work on my systems, but I'm 100% sure that there are systems out
> there with weak root passwords.

Best practices suggest:

PermitRootLogin no

Then again, the people who have weak root passwords are not ones to
follow best practices.

-- 
Phillip Hofmeister

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