We have a project in which we need to make an FTPS connections to a Serv-U ftp server.
When we connect on the internal network we are able to connect fully. However, when we connect through our PIX firewall it connects OK right up to when the LIST -aL command is issued then the connection hangs.
The PIX has the following ports open to the FTP servers public IP:
20
21
1000
Please assist.