One of my clients was trying to connect, for the first time, on his brand new server..
Somehow he wasn’t able to connect….
He showed me the following *log/report*…
Status: Waiting to retry... Status: Connecting to 37.XX.XX.XX... Response: fzSftp started Command: open "[email protected]" 22 Error: Server unexpectedly closed network connection Error: Could not connect to server
and this is the auth.log on the server…
fatal: no matching mac found: client hmac-sha1,hmac-sha1-96,hmac-md5 server [email protected],hmac-sha2-256-$
Update the SFTP client – in this case filezilla -.