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List:       busybox
Subject:    Re: Wget PASV parsing
From:       Richard Kojedzinszky <krichy () tvnetwork ! hu>
Date:       2007-11-26 8:46:46
Message-ID: Pine.LNX.4.64.0711260941480.18010 () krichy ! tvnetwork ! hu
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Dear Ralf,

Not the gw is badm because the original wget works right. What happens, is 
that the ftp-proxy answers the PASV command, not the real ftp server. And 
in such a situation, the returned address is the gw's inner address, which 
was not handled correctly by busybox's wget. Of course, you can emulate 
this in linux also, just install ftp-proxy (on debian etch)
$ apt-get install ftp-proxy
do little configuration, then make a redirection as:
$ iptables -A PREROUTING -t nat -i eth1 -p tcp --dport 21 -j DNAT 
--to-destination 192.168.1.1:2121
192.168.1.1 is the gw's inner address.

Anyway, why is an ip there in PASV's reply? Of course its there to use it.

Regards,
Kojedzinszky Richard
TvNetWork Nyrt. E-mail: krichy (at) tvnetwork [dot] 
hu PGP: 0x24E79141
   Fingerprint = 6847 ECFF EF58 0C09 18A5  16CF 270F 0C6F 24E7 9141

On Sat, 24 Nov 2007, Ralf Friedl wrote:

> Date: Sat, 24 Nov 2007 12:17:41 +0100
> From: Ralf Friedl <Ralf.Friedl@online.de>
> To: Richard Kojedzinszky <krichy@tvnetwork.hu>
> Cc: Busybox Mail List <busybox@mail.busybox.net>
> Subject: Re: Wget PASV parsing
> 
> Richard Kojedzinszky wrote:
>> I've been using busybox for a while, and ran into the problem when using 
>> wget behind an openbsd gw, with nat and ftp-proxy. Without this patch wget 
>> connects to the wrong host, so the operation fails. This fixes that, but 
>> increases size by ~60 bytes in my environment. But maybe it is worth to 
>> apply for full functionality. 
> Could you describe what is wrong?
> For all you write, it may as well be an error in the gateway that you try to 
> fix in busybox.
>
> Regards
> Ralf Friedl
>
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