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Can't ftp into server when outside the network

I have a slack 10.2 machine with proftpd setup, but whenever I am outside my network I have trouble getting into the server. I have ports 20 and 21 forwarded fine, I'm using active mode (never could get passive mode to work) and here is the error smartftp gives me:

Code:

[14:00:07] 230 User hewitsonj logged in.

[14:00:07] SYST

[14:00:07] 215 UNIX Type: L8

[14:00:07] FEAT

[14:00:08] 211-Features:

[14:00:08]  MDTM

[14:00:08]  REST STREAM

[14:00:08]  SIZE

[14:00:08] 211 End

[14:00:08] PWD

[14:00:08] 257 "/shares/www" is current directory.

[14:00:08] TYPE A

[14:00:08] 200 Type set to A

[14:00:16] PORT 129,82,18,61,6,189

[14:00:16] 200 PORT command successful

[14:00:16] LIST -aL

[14:00:56] Timeout (40s).

[14:00:56] Active Help: http://www.smartftp.com/support/kb/index.php/74

[14:00:56] Client closed the connection.

It appears as though I'm connected and logged in, but I just can't browse any files!!! Again, everything works fine when within the network...Thanks!

If you are using iptables, or perhaps even if not, make sure you have:

prompt# lsmod

ip_conntrack 56989 4 ip_nat_ftp,ip_nat,ip_conntrack_ftp,ipt_state
nfnetlink 10713 2 ip_nat,ip_conntrack

something like the above.

You are prob missing the NAT module for FTP.

Good luck young grasshopper.

This is what I get when I type lsmod:

Code:

Module                  Size  Used by    Not tainted

uhci                  24284  0  (unused)

usbcore                59148  1  [uhci]

8139too                13928  1

mii                    2272  0  [8139too]

crc32                  2880  0  [8139too]

pcmcia_core            39172  0

ide-scsi                9392  0

agpgart                45508  0  (unused)

This is the error I get from FileZilla:

Code:

Response:        200 PORT command successful

Command:        LIST

Error:        Timeout detected!

Error:        Could not retrieve directory listing