Yes, the new URL and Picturepark credentials will be listed in your Picturepark under access data.
Please contact firstname.lastname@example.org for the new URL or look in your Picturepark under Access Data after migration.
Port: 21 and 10000-10125 TCP have to allow outgoing traffic.
FTP using Explicit SSL (Auth TLS)
Please contact support for the FTP Server IP in case you only wish to open ports for the relevant server.
FTP with the browser will not work anymore as browsers do not support secure ftp such as ftpes or sftp.