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Publishing protocols on the server
With FTP publishing mode, you can use an active or passive connection type, ou both work. Test one or the other if concerned.
It is possible to create SFTP connections. This requires SSH and port 22: sftp://*****.
It is possible to use FTPES (ftpes://*****). Use port 21 and SSL/TLS encryption with Filezilla for example, you must select the "explicit FTP connection on TLS" encryption".
Ftpaccess is available.
You can not login as a public/anonymous user.
FTPs is not supported (port 2121 is not open).