From: "Pasi Kärkkäinen" <pasik@iki.fi>
To: Michael Gale <mgale@utilitran.com>
Cc: netfilter@lists.netfilter.org
Subject: Re: Protecting against DoS
Date: Tue, 9 Dec 2003 18:51:46 +0200 [thread overview]
Message-ID: <20031209165146.GD17221@edu.joroinen.fi> (raw)
In-Reply-To: <20031209094047.4dbb09f9.mgale@utilitran.com>
On Tue, Dec 09, 2003 at 09:40:47AM -0700, Michael Gale wrote:
> Hello,
>
> Can you provide more detail on the type of traffic that caused the DOS -- this may help people in the list with suggestions on how to block it :)
>
Yep. It was tcp-connections from the windows box (infected by the worm) to
some network-ranges on the internet. source-port was pretty much random, but
the destination was always 80. So the normal 'allow web browsing' rules
allowed the worm to DoS the linux-firewall.
It just opened the connections all the time, but didn't close them.
> Michael.
>
-- Pasi Kärkkäinen
^
. .
Linux
/ - \
Choice.of.the
.Next.Generation.
next prev parent reply other threads:[~2003-12-09 16:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-09 15:43 Protecting against DoS Pasi Kärkkäinen
2003-12-09 16:02 ` Michael Gale
2003-12-09 16:28 ` Pasi Kärkkäinen
2003-12-09 16:40 ` Michael Gale
2003-12-09 16:51 ` Pasi Kärkkäinen [this message]
2003-12-09 17:06 ` Michael Gale
2003-12-09 17:13 ` Pasi Kärkkäinen
2003-12-09 19:20 ` Geffrey Velásquez
2003-12-09 20:10 ` Arnt Karlsen
2003-12-10 16:53 ` Pasi Kärkkäinen
2004-01-11 1:50 ` Peter Frischknecht
2004-01-11 8:04 ` bridge vlans in HP 2524 switch Computer Security
2004-01-26 10:45 ` Protecting against DoS Pasi Kärkkäinen
-- strict thread matches above, loose matches on Subject: below --
2003-12-09 19:11 Geffrey Velásquez
2003-12-09 18:01 ` John A. Sullivan III
2003-12-09 18:16 ` Ralf Spenneberg
2003-12-09 18:41 ` John A. Sullivan III
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