pf + ftp troubles.

[Jeremy Chadwick]

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-pf/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 |