Re: Real unknown host ???

2 msg	postfix + gmail + multiusers
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Real unknown host ???
\ lst_hoe01 (13 Jun 2007)
. \ mouss (13 Jun 2007)
. \ (Wietse Venema) (13 Jun 2007)

2 msg	Another question about logs...
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Subject:	Re: Real unknown host ???
Group:	Postfix-users
From:	(Wietse Venema)
Date:	13 Jun 2007

lst_hoe01:
> Hello
>
> today i discovered some real strange entries im my Postfix logfile :
>
> Jun 13 20:25:10 v554 postfix/smtpd[22126]: connect from unknown[unknown]

Portscanner, or something else that disconnects before Postfix
handles the connection.

Wietse

> Jun 13 20:25:10 v554 postfix/smtpd[22126]: lost connection after
> CONNECT from unknown[unknown]
> Jun 13 20:25:10 v554 postfix/smtpd[22126]: disconnect from unknown[unknown]
> Jun 13 20:25:33 v554 postfix/smtpd[22126]: connect from unknown[unknown]
> Jun 13 20:25:33 v554 postfix/smtpd[22126]: lost connection after
> CONNECT from unknown[unknown]
> Jun 13 20:25:33 v554 postfix/smtpd[22126]: disconnect from unknown[unknown]
>
> It seams as if Postfix was not able to even get the IP-address of the
> connecting host. Is this something i should worry about. I would
> suspect a OS bug but would be nice if someone more knowledgeable could
> confirm.
>
> Postfix version is 2.4.3 build from source on a SuSE 10 Linux system.
>
> Thanxs
>
> Andreas
>
>
>
>
>