NetFilter
[Top] [All Lists]

Re: RELATED connections and the feeling of security

To: netfilter@lists.netfilter.org
Subject: Re: RELATED connections and the feeling of security
From: Pascal Hambourg <pascal.mail@plouf.fr.eu.org>
Date: Fri, 13 Apr 2007 23:52:16 +0200
Delivered-to: sp-com-lists@consult.net
Delivered-to: netfilter-list1@securepoint.com
In-reply-to: <461FDF35.7010901@rtij.nl>
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: <200704131202.27971.Hugo.Mildenberger@t-online.de> <1176463828.9361.14.camel@anduril.intranet.cartel-securite.net> <200704131457.59976.Hugo.Mildenberger@t-online.de> <461FC3C1.1090906@plouf.fr.eu.org> <461FDF35.7010901@rtij.nl>
Sender: netfilter-bounces@lists.netfilter.org
User-agent: Mozilla Thunderbird 1.0.6 (Windows/20050716)
Martijn Lievaart a écrit :

should the ftp-conntrack helper expose arbitrary ports on the originating host?

Yes it should, for the following two reasons :
1) The host explicitly asked for it over the FTP control connection.
2) The firewall administrator allowed it by loading the FTP conntrack module.

No, not arbitrary ports. The port asked for in the port command should be opened (and it is).

I took "arbitrary" as "arbitrarily chosen by the host".


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