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Date: Sun, 17 May 2009 23:05:44 +0200
From: Patrick =?ISO-8859-15?Q?Lamaizi=E8re?= <patfbsd@davenulle.org>
To: alexus <alexus@gmail.com>
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Subject: Re: ipnat port-range
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Le Sun, 17 May 2009 16:16:51 -0400,
alexus <alexus@gmail.com>:

> i dont see how things are obvious for you as they not so obvious for
> me. first of all my ipf default policy to allow everything.
> 
> so the original question is for ipnat and not for ipf
> 
> now for non-passive (active) i put in these rules
> 
> rdr bce0 0/0 port ftp-data -> lama port ftp-data tcp
> rdr bce0 0/0 port ftp -> lama port ftp tcp
> 
> and for pasv i still dont know what to do 
> 
> i've tried
> 
> rdr bce0 0/0 port 49152-65534 -> lama port 65534
> 
> and in my ftp i said that this is range for pasv connections

I don't think there is a way to redirect a ports ranges to a ports
range with ipnat. For my ftp server I redirect each port (I use 30000
to 30039 for FTP) with a rule:
rdr vr0 0.0.0.0/0 port 21 -> 192.168.1.4 port 21
rdr vr0 0.0.0.0/0 port 30000 -> 192.168.1.4 port 30000
rdr vr0 0.0.0.0/0 port 30001 -> 192.168.1.4 port 30001
...
rdr vr0 0.0.0.0/0 port 30038 -> 192.168.1.4 port 30038
rdr vr0 0.0.0.0/0 port 30039 -> 192.168.1.4 port 30039

For ipnat see
http://www.westworks.ch/~chris/netbsd/NetBSD-NAT-FTP-server.html

Regards.