Unknown users trying to log in? Where is it logged?

[Dotan Cohen]

I found this in logwatch:

 login:
    Authentication Failures:
       unknown (): 3 Time(s)
    Invalid Users:
       Unknown Account: 3 Time(s)
    Sessions Opened:
       hardy2 by LOGIN: 1 Time(s)

Since I am behind a NAT firewall I find this interesting. I do have
wireless enabled, could that have been an attack vector? Which log can
I check to see which usernames/passwords the attackers used?

Thanks.

-- 
Dotan Cohen

http://what-is-what.com
http://gibberish.co.il

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