[CentOS] Could not get shadow information for NOUSER

Scott Taylor scott at dctchambers.com
Thu Jul 6 14:38:49 UTC 2006


On Wed, July 5, 2006 19:47, Fajar Priyanto wrote:
> On Thursday 06 July 2006 03:46, Scott Taylor wrote:
>> Hello all,
>>
>> I have a CentOS 4.2 server that gives me these error messages in my
>> /var/log/secure file, I realise that these are SSH attacks, but where
>> does
>> the extra line "Could not get shadow information for NOUSER" come from?
>> This doesn't make any sense.  I have many servers running CentOS 4.2,
>> but don't get this error message on any others.  I hate junk in my logs.
>> Is there any way to get rid of it?
>>
>> Invalid user guest from ::ffff:210.210.4.60
>> error: Could not get shadow information for NOUSER
>> Failed password for invalid user guest from ::ffff:210.210.4.60 port
>> 55073 ssh2
>
> It's a response from the server itself when some script kiddies try to
> logon to your server using a non existent username.
> CMIIW,

Uh...yeah, I get that much.  So why is it there and how do I get rid of
it? It doesn't happen on any other servers that get the same script
attacks.

--
Scott




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