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Date:      Sat, 19 Feb 2000 18:00:14 -0500
From:      "Crist J. Clark" <cjc@cc942873-a.ewndsr1.nj.home.com>
To:        Ivan Fetch <ivanfetch@technologist.com>
Cc:        dc <admin@cyrebels.org>, questions@FreeBSD.ORG
Subject:   Re: Redirecting/mapping ports to a local machine... help!
Message-ID:  <20000219180014.B60348@cc942873-a.ewndsr1.nj.home.com>
In-Reply-To: <Pine.LNX.4.20.0002191113020.1015-100000@ibis.ivanfetch.tzo.com>; from ivanfetch@technologist.com on Sat, Feb 19, 2000 at 11:15:32AM -0700
References:  <38AED9C2.13F933BF@cyrebels.org> <Pine.LNX.4.20.0002191113020.1015-100000@ibis.ivanfetch.tzo.com>

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On Sat, Feb 19, 2000 at 11:15:32AM -0700, Ivan Fetch wrote:
>  On Sat, 19 Feb 2000, dc wrote:
> > Hi,
> > 
> > i've got 2 computers, 1 on freebsd, the other on windows. They are
> > sharing the net using natd. But i got a ftp server on port 42 of my
> > windows box, and i want to make it available from the outside... i tried
> > to do it with "redirect_port", here goes my natd.conf file:
> > 
> > 
> > ### Configuration file for Natd
> > 
> > alias_address    24.226.185.143
> > redirect_port    tcp    192.168.0.2:42    42
> > redirect_port    udp    192.168.0.2:42    42
> > 
> > ### End
> > 
> > 
> > then i launched "natd -conf /etc/natd.conf", both computers were sharing
> > the net as before, though i couldn't access the ftp server from the
> > outside.
> > 
> > I can connect to the ftp server from the bsd box using the local ip
> > (19.168.0.2)....
>
> Hello,
>    Your Windows FTP server does work on port 42:
> ftp your_Internet_IP 42
> 
> Connected to u-serv FTP...
> 
> I am not sure if this is why things were not working when you tedted them,
> but testing your ftp connection from inside your LAN (192.168.X.X) will
> not work.  Maybe telnet to another machine on the Internet and then try
> FTPing back to your FreeBSD box for testing purposes.

Doing FTP over a NAT box is problematic due to the two-channel nature
of FTP. As far as I know, NAT cannot fully support the FTP protocol.
-- 
Crist J. Clark                           cjclark@home.com


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