2 firewalls between FTP client and server

This is a bit of a weird one. Just doing some testing and this is the setup.

FTP server on an internal network with a linksys router with an appropriate port forwarded to the server. Clients on the internet not behind a linksys box can access it fine. Someone behind a linksys box can get access, but when performing a LIST command it just sits there and times out and asks again and again. :mad:

Trying in reverse order with me being the client and the server on the other end in a similar setup is the same result. I have both the client and server log files if necessary.

What to do?? Hopefully it's not a limitation of the linksys equipment :(

Some commands in FTP sessions need port 20 and 21 opened... if I remember well, 20 (ftp-data) must be opened backwards...
If I find it again, I'll show you... but thats something to think twice and it will be your problem, so search for these keywords.

Higg