pf + ftp troubles.

Hello.
I need setup non standart nat rules by pf for ftp.
All outgoing ftp connections must nat behind 172.16.5.10
address
assigned by mpd to ng0.

I setup mpd, interface is up and if i use as source address
172.16.5.10
for ftp all is fine. But ftp function in php cant choose
source address,
so i need use nat.

When i setup pf with rules:
set optimization normal
set block-policy return
scrub in all
nat on em0 from any to any port { 20 21 } -> 172.16.5.10
nat-anchor "ftp-proxy/*"
rdr-anchor "ftp-proxy/*"
rdr on ng0 proto tcp from any to any port 21 -> 127.0.0.1
port 8021
anchor "ftp-proxy/*"
pass out quick on em0 route-to { (ng0 172.16.5.1) } from
172.16.5.10 to any keep state
pass in all
pass out all

and start ftp-proxy with keys "-a 172.16.5.10 -r -vv -m
500" and try to
connect any ftp server - server respond and show me his
login prompt.
But when i try list files on ftp, client cant setup data
connection. 
In passive and in active modes.

How i can fix this problem?

OS: FreeBSD 7.0-RELEASE

Thanks,
Andrey.
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On Thu, Mar 06, 2008 at 03:57:39PM +0200, Andrey A.
Belashkov wrote:
> Hello.
> I need setup non standart nat rules by pf for ftp.
> All outgoing ftp connections must nat behind
172.16.5.10 address
> assigned by mpd to ng0.
> 
> I setup mpd, interface is up and if i use as source
address 172.16.5.10
> for ftp all is fine. But ftp function in php cant
choose source address,
> so i need use nat.
> 
> When i setup pf with rules:
> set optimization normal
> set block-policy return
> scrub in all
> nat on em0 from any to any port { 20 21 } ->
172.16.5.10
> nat-anchor "ftp-proxy/*"
> rdr-anchor "ftp-proxy/*"
> rdr on ng0 proto tcp from any to any port 21 ->
127.0.0.1 port 8021
> anchor "ftp-proxy/*"
> pass out quick on em0 route-to { (ng0 172.16.5.1) }
from 172.16.5.10 to any keep state
> pass in all
> pass out all
> 
> and start ftp-proxy with keys "-a 172.16.5.10 -r
-vv -m 500" and try to
> connect any ftp server - server respond and show me his
login prompt.
> But when i try list files on ftp, client cant setup
data connection. 
> In passive and in active modes.
> 
> How i can fix this problem?

Your pf rules for FTP are wrong.  Please see this thread:

http://lists.freebsd.org/pipermail/freebsd-p
f/2008-March/004148.html

-- 
| Jeremy Chadwick                                    jdc at
parodius.com |
| Parodius Networking                           http://www.parodius.com/
|
| UNIX Systems Administrator                      Mountain
View, CA, USA |
| Making life hard for others since 1977.                 
PGP: 4BD6C0CB |

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