CentOS - Nov 2013 - dovecot informational/error messages?

I'm getting the message

Nov 22 13:06:56 grover dovecot: imap-login: Disconnected (no auth attempts):
  rip=192.168.2.3, lip=192.168.2.5, TLS: Disconnected

every second on my CentOS-6.4 server.
Is this purely an informational message?
Or is it an error message?
And in either case, how can I stop the flood of messages?

-- 
Timothy Murphy  
e-mail: gayleard /at/ eircom.net
School of Mathematics, Trinity College, Dublin 2, Ireland

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Timothy Murphy said the following on 22/11/2013 14:12:
> Nov 22 13:06:56 grover dovecot: imap-login: Disconnected (no auth 
> attempts): rip=192.168.2.3, lip=192.168.2.5, TLS: Disconnected
> 
> every second on my CentOS-6.4 server. Is this purely an informational 
> message? Or is it an error message? And in either case, how can I stop the 
> flood of messages?
If 192.168.2.3 is a Windows host, it could be infected; had a similar issue
with one of my customers.


In any case, that log entry says that 192.168.2.3 is opening a TCP connection
to IMAP port of 192.168.2.5 and closing it without any IMAP handshake




Ciao,
luigi

- -- 
/
+--[Luigi Rosa]--
\

The more complex the mind, the greater the need for the simplicity of play.
    --James Kirk, "Shore Leave"
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