I have a server on a dmz that can ftp a file using the web browser and you can connect to the ftp server via the command line. However, when one of the developers tries to use a script to transfer the file it does not work. Additionally, when you connect to the ftp server via the command line and try to run the ls command you receive an error message saying " 500 illegal port".
I know that ftp is allowed on the firewall and ftp is part of the default global inspection policy. It looks like this is a PASV vs active issue. However in windows it does not allow you to swtich to passive mode.
Other then opening up all high level ports for this connection , does anyone have a suggestion on what/ if anything I can do on the firewall?