Sshd service must be restarted each time windows is rebooted in order to connect. Only then will a connection succeed. I believe this has been happening to me since first version 6.
Enclosed is cygcheck.out Below is output from client and windows event viewer on server ? Filezilla 3.5.3 Ubuntu 12.04 LTS x86: Verbose output 23:22:14 Status: Connecting to 23:22:14 Trace: Going to execute /usr/bin/fzsftp 23:22:14 Response: fzSftp started 23:22:14 Trace: CSftpControlSocket::ConnectParseResponse(fzSftp started) 23:22:14 Trace: CSftpControlSocket::SendNextCommand() 23:22:14 Trace: CSftpControlSocket::ConnectSend() 23:22:14 Command: open " 23:22:15 Trace: Server version: SSH-2.0-OpenSSH_6.1 23:22:15 Trace: Using SSH protocol version 2 23:22:15 Trace: We claim version: SSH-2.0-PuTTY_Local:_Mar_28_2012_12:33:05 23:22:15 Trace: Connection reset by peer 23:22:15 Error: Connection reset by peer 23:22:15 Trace: CSftpControlSocket::ResetOperation(66) 23:22:15 Trace: CControlSocket::ResetOperation(66) 23:22:15 Error: Could not connect to server 23:22:15 Status: Waiting to retry... 23:22:20 Status: Connecting to 23:22:20 Trace: Going to execute /usr/bin/fzsftp 23:22:20 Response: fzSftp started 23:22:20 Trace: CSftpControlSocket::ConnectParseResponse(fzSftp started) 23:22:20 Trace: CSftpControlSocket::SendNextCommand() 23:22:20 Trace: CSftpControlSocket::ConnectSend() 23:22:20 Command: open " 23:22:20 Trace: Server version: SSH-2.0-OpenSSH_6.1 23:22:20 Trace: Using SSH protocol version 2 23:22:20 Trace: We claim version: SSH-2.0-PuTTY_Local:_Mar_28_2012_12:33:05 23:22:20 Trace: Connection reset by peer 23:22:20 Error: Connection reset by peer 23:22:20 Trace: CSftpControlSocket::ResetOperation(66) 23:22:20 Trace: CControlSocket::ResetOperation(66) 23:22:20 Error: Could not connect to server Windows Event Viewer: Level Date and Time Source Event ID Task Category Error 4/02/2013 11:22:15 PM sshd 0 None "The description for Event ID 0 from source sshd cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer. If the event originated on another computer, the display information had to be saved with the event. The following information was included with the event: sshd: PID 1328: fatal: Write failed: Socket operation on non-socket [preauth] "
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