From: Guillaume Morin <guillaume@morinfr.org>
To: Emmanuel Fleury <fleury@cs.auc.dk>
Cc: netfilter-devel@lists.samba.org
Subject: Re: Security flaw in Stateful filtering ??????
Date: Fri, 7 Jun 2002 11:43:19 +0200 [thread overview]
Message-ID: <20020607094319.GA595@morinfr.org> (raw)
In-Reply-To: <3D007D73.9030609@cs.auc.dk>
Dans un message du 07 jun à 11:31, Emmanuel Fleury écrivait :
> >iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
> >iptables -A FORWARD -i eth0 -j ACCEPT
> >iptables -A FORWARD -j DROP
>
> Does that mean that you DROP all the ACKs, even those which are valid
> ?
Of course not, the ACKs packets are matched by --state ESTABLISHED since
they do correspond to an established connection. When ACK packets are
matched as NEW, that means that they do NOT correpond to an established
connection in the conntrack.
--
Guillaume Morin <guillaume@morinfr.org>
Batailler corps et âmes pour un maudit refus
(No one is innocent)
next prev parent reply other threads:[~2002-06-07 9:43 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20020606220914.A14542@groar.org>
2002-06-06 23:31 ` Security flaw in Stateful filtering ?????? Rusty Russell
2002-06-06 23:52 ` Joerg Mayer
2002-06-07 2:10 ` Rusty Russell
2002-06-07 2:53 ` Joerg Mayer
2002-06-07 12:45 ` Marcus Sundberg
2002-06-07 14:36 ` Henrik Nordstrom
2002-06-07 21:48 ` Ben Reser
2002-06-07 8:15 ` Emmanuel Fleury
2002-06-07 8:50 ` Oskar Andreasson
2002-06-07 12:27 ` Jozsef Kadlecsik
2002-06-10 8:04 ` Oskar Andreasson
2002-06-10 8:26 ` Emmanuel Fleury
2002-06-12 9:23 ` Jozsef Kadlecsik
2002-06-07 9:05 ` Henrik Nordstrom
2002-06-07 9:31 ` Emmanuel Fleury
2002-06-07 9:41 ` Oskar Andreasson
2002-06-07 9:43 ` Guillaume Morin [this message]
2002-06-07 9:57 ` Emmanuel Fleury
2002-06-07 10:17 ` Guillaume Morin
2002-06-07 11:30 ` Emmanuel Fleury
2002-06-07 13:33 ` Guillaume Morin
2002-06-07 15:13 ` Emmanuel Fleury
2002-06-07 18:36 ` Guillaume Morin
2002-06-07 19:00 ` Patrick Schaaf
2002-06-08 2:06 ` Emmanuel Fleury
2002-06-08 8:21 ` Patrick Schaaf
2002-06-08 12:02 ` Henrik Nordstrom
2002-06-09 7:03 ` Emmanuel Fleury
2002-06-09 8:29 ` Patrick Schaaf
2002-06-08 1:42 ` Emmanuel Fleury
2002-06-07 10:17 ` Henrik Nordstrom
2002-06-07 10:11 ` Henrik Nordstrom
2002-06-07 22:02 ` Ben Reser
2002-06-08 2:13 ` Emmanuel Fleury
2002-06-08 8:23 ` Patrick Schaaf
2002-06-08 16:41 ` Ben Reser
2002-06-08 9:07 ` ACK is NEW: Conclusion ? (was:Re: Security flaw in Stateful filtering ??????) Emmanuel Fleury
2002-06-07 9:42 Security flaw in Stateful filtering ?????? Mikkel Christiansen
2002-06-08 7:44 ` Harald Welte
-- strict thread matches above, loose matches on Subject: below --
2002-06-06 22:15 Andy Whitcroft
2002-06-06 19:29 Sneppe Filip
2002-06-06 17:21 Emmanuel Fleury
2002-06-06 17:48 ` Martin Josefsson
2002-06-06 17:54 ` Maciej Soltysiak
2002-06-06 18:52 ` Emmanuel Fleury
2002-06-06 19:11 ` Maciej Soltysiak
2002-06-06 19:30 ` Guillaume Morin
2002-06-06 19:53 ` Patrick Schaaf
2002-06-06 19:43 ` Henrik Nordstrom
2002-06-06 17:57 ` Patrick Schaaf
2002-06-06 18:34 ` Emmanuel Fleury
2002-06-06 19:12 ` Patrick Schaaf
2002-06-06 19:28 ` Emmanuel Fleury
2002-06-06 19:27 ` Henrik Nordstrom
2002-06-06 20:50 ` Emmanuel Fleury
2002-06-06 21:26 ` Henrik Nordstrom
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