From: Eric Leblond <eric@inl.fr>
To: Christian Seberino <seberino@spawar.navy.mil>
Cc: Ray Schumacher <rays@blue-cove.com>, netfilter@lists.netfilter.org
Subject: Re: How make iptables script with NAT handle "active FTP"?
Date: Wed, 01 Feb 2006 10:43:37 +0100 [thread overview]
Message-ID: <1138787017.6290.2.camel@localhost.localdomain> (raw)
In-Reply-To: <1138390474.4844.79.camel@localhost.localdomain>
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Le vendredi 27 janvier 2006 à 11:34 -0800, Christian Seberino a écrit :
> Active FTP seems to need to open new sockets.
>
> This creates problems for NAT'ing firewalls.
>
> What is easiest way to open the right ports
>
> and do NAT'ing back to clients on 192.168.x.y IP addresses?
Netfilter has a module called ip_conntrack_ftp which is used to take new
socket opening into account for the ftp protocol. To use that feature
you need t load the module and use a rule which accept packet RELATED to
another connection :
iptables -I FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
BR,
--
Éric Leblond, eleblond@inl.fr
Téléphone : 01 44 89 46 40, Fax : 01 44 89 45 01
INL, http://www.inl.fr
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next prev parent reply other threads:[~2006-02-01 9:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-27 19:34 How make iptables script with NAT handle "active FTP"? Christian Seberino
2006-02-01 6:50 ` Rob Sterenborg
2006-02-01 9:43 ` Eric Leblond [this message]
2006-02-02 11:01 ` Fwd: " Carlos Pastorino
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