martin wrote:

Haven't seen the problem before. Are you able to connect with any other SSH client?

No I am not able to connect using other clients also, I think the reason could be
because of some firewalls setting on Windows 2003 server. I shall try to figure out as which are the security setting on Windows 2003 server blocking access to use the ssh client service, and then try to connect.

Haven't seen the problem before. Are you able to connect with any other SSH client?

I am trying to use Winscp on Windows 2003 server, to connect to a linux system running SSH.

I am able to connect to this particular linux system by using Winscp from any other system running windows XP or windows 7.
However when I try to connect using Winscp on windows 2003 server system, I get a dialog box with following message

"socket operation on non - socket", and the operation fails.

Has anyone come across the same error? Is there any solution for the problem ?

below is the content of the session.log file

. 2010-06-28 12:34:40.449 --------------------------------------------------------------------------
. 2010-06-28 12:34:40.449 WinSCP Version 4.0.7 (Build 370) (OS 5.2.3790 Service Pack 2)
. 2010-06-28 12:34:40.449 Login time: Monday, June 28, 2010 12:34:40 PM
. 2010-06-28 12:34:40.449 --------------------------------------------------------------------------
. 2010-06-28 12:34:40.449 Session name: session
. 2010-06-28 12:34:40.449 Host name: 192.168.0.84 (Port: 22)
. 2010-06-28 12:34:40.449 User name: environ (Password: No, Key file: No)
. 2010-06-28 12:34:40.449 Tunnel: No
. 2010-06-28 12:34:40.449 Transfer Protocol: SFTP (SCP)
. 2010-06-28 12:34:40.449 Ping type: -, Ping interval: 30 sec; Timeout: 15 sec
. 2010-06-28 12:34:40.449 Proxy: none
. 2010-06-28 12:34:40.449 SSH protocol version: 2; Compression: No
. 2010-06-28 12:34:40.449 Agent forwarding: No; TIS/CryptoCard: No; KI: Yes; GSSAPI: No
. 2010-06-28 12:34:40.449 Ciphers: aes,blowfish,3des,WARN,des; Ssh2DES: No
. 2010-06-28 12:34:40.449 Ciphers: aes,blowfish,3des,WARN,des; Ssh2DES: No
. 2010-06-28 12:34:40.449 SSH Bugs: -,-,-,-,-,-,-,-
. 2010-06-28 12:34:40.449 SFTP Bugs: -,-,-
. 2010-06-28 12:34:40.449 Return code variable: Autodetect; Lookup user groups: Yes
. 2010-06-28 12:34:40.449 Shell: default, EOL: 0
. 2010-06-28 12:34:40.449 Clear aliases: Yes, Unset nat.vars: Yes, Resolve symlinks: Yes
. 2010-06-28 12:34:40.449 Alias LS: No, Ign LS warn: Yes, Scp1 Comp: No
. 2010-06-28 12:34:40.449 Local directory: default, Remote directory: home, Update: No, Cache: Yes
. 2010-06-28 12:34:40.449 Cache directory changes: Yes, Permanent: Yes
. 2010-06-28 12:34:40.449 DST mode: 1
. 2010-06-28 12:34:40.449 --------------------------------------------------------------------------
. 2010-06-28 12:34:40.449 Looking up host "192.168.0.84"
. 2010-06-28 12:34:40.449 Connecting to 192.168.0.84 port 22
. 2010-06-28 12:34:40.465 Server version: SSH-2.0-OpenSSH_4.3
. 2010-06-28 12:34:40.465 We claim version: SSH-2.0-WinSCP_release_4.0.7
. 2010-06-28 12:34:40.465 Closing connection.
* 2010-06-28 12:34:40.480 (ESshFatal) Network error: Socket operation on non-socket

Thanks