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Re: RELATED connections and the feeling of security

To: Pascal Hambourg <pascal.mail@plouf.fr.eu.org>
Subject: Re: RELATED connections and the feeling of security
From: Martijn Lievaart <m@rtij.nl>
Date: Fri, 13 Apr 2007 21:51:17 +0200
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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>
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Pascal Hambourg wrote:
Hello,

Hugo Mildenberger 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).

M4



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