Cannot connect to FTP from WAN side

I have bullet proof FTP server installed to our SBS 2003. The firewall
I'm using is Draytek Vigor 2950 series.

I can connect to ftp server just fine from LAN side using our servers
internal address, but for some reason I just can't connect to this FTP
server from WAN side (tested using computers outside our LAN) using
our public IP.

In Vigor firewall I have set up port redirection for port 21 to our
servers LAN address (port 21).

I have also set up filter rule to firewall to allow all connections to
port 21.

Now I'm just out of options. I can't figure out what could prevent me
from connecting to FTP server.


Any help and suggestions are higly appreciated!

Best regards,
Aki Koikkalainen

Sirri wrote:
> I have bullet proof FTP server installed to our SBS 2003. The firewall
> I'm using is Draytek Vigor 2950 series.
>
> I can connect to ftp server just fine from LAN side using our servers
> internal address, but for some reason I just can't connect to this FTP
> server from WAN side (tested using computers outside our LAN) using
> our public IP.
>
> In Vigor firewall I have set up port redirection for port 21 to our
> servers LAN address (port 21).
>
> I have also set up filter rule to firewall to allow all connections to
> port 21.
>
> Now I'm just out of options. I can't figure out what could prevent me
> from connecting to FTP server.
>
>
> Any help and suggestions are higly appreciated!
>
> Best regards,
> Aki Koikkalainen
>

It's not just port 21. See:
http://www.slacksite.com/other/ftp.html
.... or google for "FTP ports"

Phil, London