From: Chris Brenton <cbrenton@chrisbrenton.org>
To: Marc Haber <mh+netfilter@zugschlus.de>
Cc: netfilter <netfilter@lists.netfilter.org>
Subject: Re: DROP or REJECT
Date: Tue, 11 May 2004 18:19:27 -0400 [thread overview]
Message-ID: <1084313967.2953.27.camel@grendel> (raw)
In-Reply-To: <20040511183825.GH23789@torres.ka0.zugschlus.de>
On Tue, 2004-05-11 at 14:38, Marc Haber wrote:
>
> On Tue, May 11, 2004 at 01:16:03PM -0400, Chris Brenton wrote:
> > Depends. I like rejecting with host-unreachables as it makes it look
> > like you do not have a firewall.
>
> NACK. If I weren't there, the host unreachable would have the source
> address of the upstream router, and not my own one.
I didn't say "not there", I said "look like there is no firewall". The
type 3 code 1 mimics the response of a typical router.
> To be truly
> invisible, you'd need to fake the upstream router's IP address,
Not going to work. Firewalk will quickly identify there is a hop on the
wire that is not accounted for. Thus I don't bother shooting for
invisible, just a little bit of decoying and deception. ;-)
HTH,
Chris
next prev parent reply other threads:[~2004-05-11 22:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-11 13:45 DROP or REJECT Peter Marshall
2004-05-11 13:52 ` Frank Gruellich
2004-05-11 17:16 ` Chris Brenton
2004-05-11 18:17 ` Frank Gruellich
2004-05-11 22:15 ` Chris Brenton
2004-05-11 18:38 ` Marc Haber
2004-05-11 22:19 ` Chris Brenton [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-10-11 5:28 Fw: How to remove Established Connection HareRam
2002-10-11 8:16 ` HareRam
2002-10-11 9:15 ` Michael
2002-10-11 12:30 ` Antony Stone
2002-10-11 14:03 ` HareRam
2002-10-11 16:15 ` DROP or REJECT HareRam
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