ssh attempts

[Emilio Casbas <ecasbas () unav es>]

I´ve noticed that several Linux Machines I have running are getting 
scanned via ssh for
multiple accounts such as "guest webmaster mysql info shell apache 
test..." and many others,
the log show:

Jan  3 01:31:08 machine sshd2[22087]: WARNING: DNS lookup failed for 
"X.X.X.233".
Jan  3 01:31:10 machine sshd2[22087]: password authentication failed. 
Login to account webmaster not allowed or account non-existent.
Jan  3 01:31:13 machine sshd2[21757]: LoginGraceTime exceeded.

as well there are attempts to connect with root login, with the log 
message show as:

WARNING: DNS lookup failed for "X.X.X.233".
Jan  3 01:17:53 machine sshd2[21651]: root login denied for user 'root'.

Obviously, We don´t have accounts with that name on our systems, and the 
root account
is disabled for ssh, but I would like to know which software can do this 
scan type, because
while it's running, the machine proccesses grow too much.

Thanks.
Emilio C.


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