Attempted SSH Logins

[Nathaniel Hall]

Hi all.

 

I have been monitoring our logs over the past several weeks using logwatch
and have noticed several of these entries (known entries omitted):

 

sshd:

   Invalid Users:

      Unknown Account: 5 Time(s)

   Authentication Failures:

      test (server.bes1.com ): 2 Time(s)

      root (server.bes1.com ): 3 Time(s)

      unknown (server.bes1.com ): 4 Time(s)

 

The source addresses vary.  I always see the same accounts from different
addresses with a different number of tries.  When I see these, there is only
one source, never a mix of sources.  The next day, it might be a different
source, but it is the only one.

 

Is anybody else seeing this in their logs where I shouldn't be as worried or
is this directed at us?

 

 

~~~~~~~~~~~~~~~~~~~~~~~~~~

Nathaniel Hall

Intrusion Detection and Firewall Technician

Ozarks Technical Community College -- Office of Computer Networking

 

halln at otc.edu

417-799-0552