From: Joshua Kwan <joshk@triplehelix.org>
To: "Richard B. Johnson" <root@chaos.analogic.com>
Cc: linux-kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: Everything gone!
Date: Wed, 19 Mar 2003 18:04:48 -0800 [thread overview]
Message-ID: <20030320020448.GC4821@triplehelix.org> (raw)
In-Reply-To: <Pine.LNX.4.53.0303191310570.32397@chaos>
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On Wed, Mar 19, 2003 at 01:12:49PM -0500, Richard B. Johnson wrote:
> > > Perhaps:
> > >
> > > telnet target.system 25
> > > enter SMTP commands
> > > quit
> >
> > Normaly that would record the IP of the host doing the telnet.
> > (the first "Recieved: from" line in the log list where the original says
> > "Received: from localhost"....)
>
> Yes. I just looked at maillog on that machine and all I had was
> the 'evidence' of me screwing with it to see. Apparently it wasn't
> used for forwarding mail as I thought.
Well, a nice way to do this is: (probably not syntactically correct..)
router# iptables -t nat -A PREROUTING -i lan0 -p tcp ! -s
local.netework/12 -d ip.of.lan0 --dport 25 -j DROP
Depending on how your network is set up, this may or may not work... my
server box itself is masq'd so this works nicely on my network.
Regards,
Josh
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next prev parent reply other threads:[~2003-03-20 1:53 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-19 15:46 Richard B. Johnson
2003-03-19 16:02 ` Richard B. Johnson
2003-03-19 17:33 ` John Jasen
2003-03-19 17:50 ` Richard B. Johnson
2003-03-19 17:55 ` Jesse Pollard
2003-03-19 18:12 ` Richard B. Johnson
2003-03-20 2:04 ` Joshua Kwan [this message]
2003-03-19 21:18 ` James H. Cloos Jr.
2003-03-19 16:04 ` Matthias Schniedermeyer
2003-03-19 16:21 ` Richard B. Johnson
2003-03-19 16:37 ` Xavier Bestel
2003-03-19 16:51 ` Eli Carter
2003-03-19 17:12 ` Xavier Bestel
2003-03-19 17:01 ` Richard B. Johnson
2003-03-19 18:23 ` Eric Weigle
2003-03-19 18:32 ` Matthias Schniedermeyer
2003-03-20 8:57 ` Sean Neakums
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