Our IIS server already has an ftp site for anonymous access. What I wanted to do was have ftp upload capability for our webmaster to the website. Since our firewall already forwards port 21 to the default website, I thought I should be able to use another port (I chose 30) and point it to the directory where the website resides, giving access only to the webmaster. It seemed to work (sort of), going to the correct server and allowing login, but then the ftp client reports a server response of "Invalid port command" and will not list the files. I've given the webmaster write access to the website directory but still get the same error. Since it's actually an ftp site that just happens to point to the same directory as the website, I didn't think it would require directory listing permission for the website, but briefly tried that anyway without success. Any ideas?