Verify that your firewall has these ports open. For the data channel, Box uses ports 10,000 - 29,999. This problem can be solved with the use of a limited range of ports for data and configuring the firewall to open these ports. Therefore, in many firewalled networks, an FTPS deployment will fail when an unencrypted FTP deployment works. However, if the FTP control connection is encrypted using TLS/SSL, the firewall cannot determine the TCP port number of a data connection negotiated between the client and FTP server. Also known as FTPES.īecause FTP utilizes a dynamic secondary port (for data channels), many firewalls were designed to snoop FTP protocol control messages to determine which secondary data connections they need to allow. For further help, type either command in your terminal: man curl or curl -helpįTPS is FTP with support for Transport Layer Security (TLSv1.2). Note: Curl doesn't stay connected like a typical connect command. Without the trailing "/" in the dir name: "", a "551 Box: Not Found" error will be generated. ![]() Open a terminal session: shell> curl -1 -v -disable-epsv -ftp-skip-pasv-ip -u -ssl-reqd -upload-file filename Shell> curl -1 -v -disable-epsv -ftp-skip-pasv-ip -u -ssl-reqd ftps://:990
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