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i changed default SSH port with ssh in /etc/ssh/sshd_config and set it to 2211. now i can connect to server with ssh and new port, but in FileZilla when i try to connect to server with this new port (2211) for send some files to server, it generates an error :

Error:  Cannot establish FTP connection to an SFTP server. Please select proper protocol.
Error:  Critical error: Could not connect to server

what's the problem? and how can i solve it? tanx.

closed as off-topic by Khaled, mdpc, kasperd, Jenny D, MadHatter Mar 20 '17 at 21:18

  • This question does not appear to be about server, networking, or related infrastructure administration within the scope defined in the help center.
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2

It seems that filezilla is trying to connect using FTP protocol via SSH port. You can force it to switch to SFTP protocl by specifying the hostname like:

sftp://server_ip

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