NetFilter
[Top] [All Lists]

Re: Interesting article about punching holes in firewalls...

To: Mail List - Netfilter <netfilter@lists.netfilter.org>
Subject: Re: Interesting article about punching holes in firewalls...
From: Pascal Hambourg <pascal.mail@plouf.fr.eu.org>
Date: Tue, 19 Dec 2006 12:46:54 +0100
Delivered-to: sp-com-lists@consult.net
Delivered-to: netfilter-list1@securepoint.com
In-reply-to: <Pine.LNX.4.64.0612191128180.11364@blackhole.kfki.hu>
List-archive: </pipermail/netfilter>
List-help: <mailto:netfilter-request@lists.netfilter.org?subject=help>
List-id: General discussion and user questions <netfilter.lists.netfilter.org>
List-post: <mailto:netfilter@lists.netfilter.org>
List-subscribe: <https://lists.netfilter.org/mailman/listinfo/netfilter>, <mailto:netfilter-request@lists.netfilter.org?subject=subscribe>
List-unsubscribe: <https://lists.netfilter.org/mailman/listinfo/netfilter>, <mailto:netfilter-request@lists.netfilter.org?subject=unsubscribe>
Organization: Plouf !
References: <45860240.2040102@riverviewtech.net> <1166426813.8007.10.camel@anduril.intranet.cartel-securite.net> <4587B400.6080206@rtij.nl> <Pine.LNX.4.64.0612191128180.11364@blackhole.kfki.hu>
Sender: netfilter-bounces@lists.netfilter.org
User-agent: Mozilla Thunderbird 1.0.6 (Windows/20050716)
Jozsef Kadlecsik a écrit :

The article must be corrected at one place: the claim: "After an outgoing SYN packet the firewall / NAT router will forward incoming packets with suitable IP addresses and ports to the LAN even if they fail to confirm, or confirm the wrong sequence number (ACK). Linux firewalls at least, clearly fail to evaluate this information consistently." is outdated and not true for 2.6 kernels.

For *recent* 2.6 kernels, with "recent" meaning 2.6.9 and above.


<Prev in Thread] Current Thread [Next in Thread>