I have to provide SFTP via OpenSSH on Windows Server 2003 for UNIX AIX
machines. I installed version 3.8.1 of OpenSSH, learned the configuration and
was happy to connect successfully via WinSCP with username and password. But
it works only once after starting the OpenSSH service. The second attempt with
WinSCP returns a "connection refused". When I restart the OpenSSH service, I
can connect the machines and can do SFTP. As soon as this connection is closed
I have to restart the service again (etc.). By using the VERBOSE flag in
sshd_config, my current assumption is OpenSSH stops listening on Port 22 after
closing the connection because no new protocol entry is written after.
Any help is appreciated!
one addition: when I connect with PuTTY on local, I get the same result. 1st
attempt is ok, 2nd attempt network error.
after closing the session with WinSCP the OpenSSH service on windows stops.
here are the latest log entries:
Accepted password for Administrator from 184.108.40.206 port 2778 ssh2
debug1: Entering interactive session for SSH2.
debug2: fd 3 setting O_NONBLOCK
debug2: fd 7 setting O_NONBLOCK
debug1: server_input_channel_open: ctype session rchan 256 win 2147483647 max
debug1: channel 0: new
debug1: session_new: init
debug1: session_new: session 0
debug1: session_open: channel 0
debug1: session_open: session 0: link with channel 0
debug1: server_input_channel_open: confirm session
debug1: server_input_channel_req: channel 0 request
email@example.com reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req
debug1: server_input_channel_req: channel 0 request subsystem reply 1
debug1: session_input_channel_req: session 0 req subsystem
subsystem request for sftp
debug1: subsystem: exec() /usr/sbin/sftp-server
debug2: fd 10 setting O_NONBLOCK
debug2: fd 9 setting O_NONBLOCK
debug2: channel 0: rcvd eof
debug2: channel 0: output open -> drain
debug2: channel 0: obuf empty
debug2: channel 0: close_write
debug2: channel 0: output drain -> closed
Connection closed by 220.127.116.11
debug1: channel 0: free: server-session, nchannels 1
debug1: session_close: session 0 pid 3664
Closing connection to <... my ip address ...>
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