[cobalt-users] FTP: "Can't build data connection: No route to host."

["A Larter" <alarter@xxxxxxxxxxxxxxxxxxx>]

Hi,

The above error occurs when I use DOS FTP to get to (so far all)
external servers. We are using a Qube3 with the basic firewall enabled
with the default settings. In case it's useful, here's a log of a normal
FTP session:

---

C:\>ftp
ftp> myhost.com
Connected to myhost.com.
220-------------------------
220-MOTD
User (myhost.com:(none)): myusername
331 Password required.
Password:
230-Welcome messge
230-Current directory: /users/myusername
ftp> ls
200 PORT command successful.
425 Can't build data connection: No route to host.
ftp>

---

I understand that the host, using the data port to return the directory
listing (I always get port 20 and 21 the wrong way round) can find no
way back to the source of the command, since the machine I am FTPing
from uses an internal IP address. 

I have managed to get round this most of the time by using PASV mode via
an FTP client, but I would like to be able to set up a batch FTP process
on a Windows machine, which obviously needs to use DOS FTP.

I am hunting around for a solution to this (the knowledge base and list
archives don't appear to have anything), but haven't managed to come up
with anything as yet. Has anyone else had this problem, and managed to
solve it? I would be very grateful for any suggestions/solutions/offers
of hard cash.

Thanks.