could not connect to server

[grubby]

Hi, guy.
I am trying to access SFTP to web server from our local computer and server, i installed client on both windows 10 pro and windows server 2016. Same setting, the windows 10 pro can access, but not the windows server 2016. is there specific step need to do on windows server

[boco]

Allow connections for the "fzsftp.exe" executable in your firewall. Servers are usually set up more strict, security-wise.

[grubby]

Thanks for the reply.

I added fzsftp.exe" executable in my firewall, but still doesnt connect.
I tried installed the client on other server with windows server 2012R2, it connected. The one have issue is windows server 2016.
here is the error message:
Status: Connecting to ssh.xxxxxxxxxxxx.io:29317...
Response: fzSftp started, protocol_version=9
Command: open "sftp-user@ssh.ssh.xxxxxxxxxxxx.io" 29317
Error: FATAL ERROR: Network error: Software caused connection abort
Error: Could not connect to server

then i turn off the symantec, got this one:
Status: Connecting to ssh.xxxxxxxxxxxx.io:29317...
Response: fzSftp started, protocol_version=9
Command: open "sftp-user@ssh.xxxxxxxxxxxx.io" 29317
Error: FATAL ERROR: Remote side unexpectedly closed network connection
Error: Could not connect to server

any idea what is wrong?

[botg]

That's an unusual port for SFTP. Normally SFTP should be on port 22.