using winscp on internal network

I have two computers on my home network. I recently reconfigured my network such that these two computers now use internal (192.168.x.x) addresses rather than external (66.92.x.x) addresses. This is the only change I made. After this change, winscp stopped working between the two computers. Oddly, just using the latest PuTTy still works. Any clues for what I can look for? Here are the facts, and the log output (sorry for the massive post):

All requests made from Windows to Linux.
Windows XP Pro (laptop)
Fedora Core 5 (server)
Latest WinSCP (4.0.4/346)

. 2007-10-03 10:22:35.284 --------------------------------------------------------------------------
. 2007-10-03 10:22:35.284 WinSCP Version 4.0.4 (Build 346) (OS 5.1.2600 Service Pack 2)
. 2007-10-03 10:22:35.284 Login time: Wednesday, October 03, 2007 10:22:35 AM
. 2007-10-03 10:22:35.284 --------------------------------------------------------------------------
. 2007-10-03 10:22:35.284 Session name: peter@192.168.10.187
. 2007-10-03 10:22:35.284 Host name: 192.168.10.187 (Port: 22)
. 2007-10-03 10:22:35.284 User name: peter (Password: No, Key file: No)
. 2007-10-03 10:22:35.284 Tunnel: No
. 2007-10-03 10:22:35.284 Transfer Protocol: SCP
. 2007-10-03 10:22:35.284 Ping type: -, Ping interval: 30 sec; Timeout: 15 sec
. 2007-10-03 10:22:35.294 Proxy: none
. 2007-10-03 10:22:35.294 SSH protocol version: 2; Compression: No
. 2007-10-03 10:22:35.294 Agent forwarding: No; TIS/CryptoCard: No; KI: Yes; GSSAPI: No
. 2007-10-03 10:22:35.294 Ciphers: aes,blowfish,3des,WARN,des; Ssh2DES: No
. 2007-10-03 10:22:35.294 SSH Bugs: -,-,-,-,-,-,-,-
. 2007-10-03 10:22:35.294 SFTP Bugs: -,-,-
. 2007-10-03 10:22:35.294 Return code variable: Autodetect; Lookup user groups: Yes
. 2007-10-03 10:22:35.294 Shell: default, EOL: 0
. 2007-10-03 10:22:35.294 Clear aliases: Yes, Unset nat.vars: Yes, Resolve symlinks: Yes
. 2007-10-03 10:22:35.294 Alias LS: No, Ign LS warn: Yes, Scp1 Comp: No
. 2007-10-03 10:22:35.294 Local directory: C:\Documents and Settings\Peter\Desktop\Downloads, Remote directory: /home/peter, Update: No, Cache: Yes
. 2007-10-03 10:22:35.294 Cache directory changes: Yes, Permanent: Yes
. 2007-10-03 10:22:35.294 DST mode: 1
. 2007-10-03 10:22:35.294 --------------------------------------------------------------------------
. 2007-10-03 10:22:35.434 Looking up host "192.168.10.187"
. 2007-10-03 10:22:35.434 Connecting to 192.168.10.187 port 22
. 2007-10-03 10:22:38.889 Selecting events 63 for socket 604
. 2007-10-03 10:22:38.899 Waiting for the server to continue with the initialisation
. 2007-10-03 10:22:38.899 Looking for incoming data
. 2007-10-03 10:22:38.899 Looking for network events
. 2007-10-03 10:22:38.899 Detected network event
. 2007-10-03 10:22:38.899 Enumerating network events for socket 604
. 2007-10-03 10:22:38.899 Enumerated 18 network events for socket 604
. 2007-10-03 10:22:38.899 Detected network write event on socket 604 with error 0
. 2007-10-03 10:22:38.899 Detected network connect event on socket 604 with error 0
. 2007-10-03 10:22:38.899 Looking for network events
. 2007-10-03 10:22:40.892 Detected network event
. 2007-10-03 10:22:40.892 Enumerating network events for socket 604
. 2007-10-03 10:22:40.892 Enumerated 1 network events for socket 604
. 2007-10-03 10:22:40.892 Detected network read event on socket 604 with error 0
. 2007-10-03 10:22:40.892 Server version: SSH-2.0-OpenSSH_4.3
. 2007-10-03 10:22:40.932 We claim version: SSH-2.0-WinSCP_release_4.0.4
. 2007-10-03 10:22:40.932 Using SSH protocol version 2
. 2007-10-03 10:22:40.932 Waiting for the server to continue with the initialisation
. 2007-10-03 10:22:40.932 Looking for incoming data
. 2007-10-03 10:22:40.932 Looking for network events
. 2007-10-03 10:22:41.893 Detected network event
. 2007-10-03 10:22:41.893 Enumerating network events for socket 604
. 2007-10-03 10:22:41.893 Enumerated 1 network events for socket 604
. 2007-10-03 10:22:41.893 Detected network read event on socket 604 with error 0
. 2007-10-03 10:22:41.943 Doing Diffie-Hellman group exchange
. 2007-10-03 10:22:41.943 Waiting for the server to continue with the initialisation
. 2007-10-03 10:22:41.943 Looking for incoming data
. 2007-10-03 10:22:41.943 Looking for network events
. 2007-10-03 10:22:43.896 Detected network event
. 2007-10-03 10:22:43.896 Enumerating network events for socket 604
. 2007-10-03 10:22:43.896 Enumerated 1 network events for socket 604
. 2007-10-03 10:22:43.896 Detected network read event on socket 604 with error 0
. 2007-10-03 10:22:43.926 Doing Diffie-Hellman key exchange
. 2007-10-03 10:22:44.086 Waiting for the server to continue with the initialisation
. 2007-10-03 10:22:44.086 Looking for incoming data
. 2007-10-03 10:22:44.086 Looking for network events
. 2007-10-03 10:22:44.898 Detected network event
. 2007-10-03 10:22:44.898 Enumerating network events for socket 604
. 2007-10-03 10:22:44.898 Enumerated 1 network events for socket 604
. 2007-10-03 10:22:44.898 Detected network read event on socket 604 with error 0
. 2007-10-03 10:22:45.078 Selecting events 63 for socket 604
. 2007-10-03 10:22:45.078 Host key fingerprint is:
. 2007-10-03 10:22:45.078 ssh-rsa 2048 [blah]
. 2007-10-03 10:22:45.078 Initialised AES-256 client->server encryption
. 2007-10-03 10:22:45.078 Initialised HMAC-SHA1 client->server MAC algorithm
. 2007-10-03 10:22:45.088 Initialised AES-256 server->client encryption
. 2007-10-03 10:22:45.088 Initialised HMAC-SHA1 server->client MAC algorithm
. 2007-10-03 10:22:45.088 Waiting for the server to continue with the initialisation
. 2007-10-03 10:22:45.088 Looking for incoming data
. 2007-10-03 10:22:45.088 Looking for network events
. 2007-10-03 10:22:46.890 Detected network event
. 2007-10-03 10:22:46.890 Enumerating network events for socket 604
. 2007-10-03 10:22:46.890 Enumerated 1 network events for socket 604
. 2007-10-03 10:22:46.890 Detected network read event on socket 604 with error 0
! 2007-10-03 10:22:46.890 Using username "peter".
. 2007-10-03 10:22:46.890 Waiting for the server to continue with the initialisation
. 2007-10-03 10:22:46.890 Looking for incoming data
. 2007-10-03 10:22:46.890 Looking for network events
. 2007-10-03 10:22:47.892 Detected network event
. 2007-10-03 10:22:47.892 Enumerating network events for socket 604
. 2007-10-03 10:22:47.892 Enumerated 1 network events for socket 604
. 2007-10-03 10:22:47.892 Detected network read event on socket 604 with error 0
. 2007-10-03 10:22:47.892 Session password prompt (peter@192.168.10.187's password: )
. 2007-10-03 10:22:54.892 Sent password
. 2007-10-03 10:22:54.892 Waiting for the server to continue with the initialisation
. 2007-10-03 10:22:54.892 Looking for incoming data
. 2007-10-03 10:22:54.892 Looking for network events
. 2007-10-03 10:22:55.893 Detected network event
. 2007-10-03 10:22:55.893 Enumerating network events for socket 604
. 2007-10-03 10:22:55.893 Enumerated 1 network events for socket 604
. 2007-10-03 10:22:55.893 Detected network read event on socket 604 with error 0
. 2007-10-03 10:22:55.893 Access granted
. 2007-10-03 10:22:55.893 Waiting for the server to continue with the initialisation
. 2007-10-03 10:22:55.893 Looking for incoming data
. 2007-10-03 10:22:55.893 Looking for network events
. 2007-10-03 10:22:56.885 Detected network event
. 2007-10-03 10:22:56.885 Enumerating network events for socket 604
. 2007-10-03 10:22:56.885 Enumerated 1 network events for socket 604
. 2007-10-03 10:22:56.885 Detected network read event on socket 604 with error 0
. 2007-10-03 10:22:56.885 Opened channel for session
. 2007-10-03 10:22:56.895 Waiting for the server to continue with the initialisation
. 2007-10-03 10:22:56.895 Looking for incoming data
. 2007-10-03 10:22:56.895 Looking for network events
. 2007-10-03 10:23:11.896 Timeout waiting for network events
. 2007-10-03 10:23:11.896 Waiting for data timed out, asking user what to do.
. 2007-10-03 10:23:11.896 Asking user:
. 2007-10-03 10:23:11.896 Host has not answered for 15 seconds.
. 2007-10-03 10:23:11.896
. 2007-10-03 10:23:11.896 Wait for another 15 seconds? ()
. 2007-10-03 10:23:12.397 Pooling for data in case they finally arrives
. 2007-10-03 10:23:12.397 Looking for network events
. 2007-10-03 10:23:12.397 Timeout waiting for network events
. 2007-10-03 10:23:12.898 Pooling for data in case they finally arrives
[repeated many, many times]
. 2007-10-03 10:26:18.805 Looking for network events
. 2007-10-03 10:26:18.805 Detected network event
. 2007-10-03 10:26:18.805 Enumerating network events for socket 604
. 2007-10-03 10:26:18.805 Enumerated 32 network events for socket 604
. 2007-10-03 10:26:18.805 Detected network close event on socket 604 with error 10053
. 2007-10-03 10:26:18.805 Selecting events 0 for socket 604
. 2007-10-03 10:26:18.805 Network error: Software caused connection abort
. 2007-10-03 10:26:18.805 Looking for incoming data
* 2007-10-03 10:26:18.805 (ESshFatal) Connection has been unexpectedly closed. Server sent command exit status 0.
* 2007-10-03 10:26:18.805 Authentication log (see session log for details):
* 2007-10-03 10:26:18.805 Using username "peter".
* 2007-10-03 10:26:18.805
* 2007-10-03 10:26:18.805 Authentication failed.

Can you try PuTTY 0.58?

Bad news - I just discovered that my computer was rooted. It was running a DOS against someone and all of its resources were being consumed. So I guess that solves that one :-)

BTW, this is properly the subject of a bug-report, but I noticed that unchecking the "Enable logging" checkbox will not actually disable logging if the "Log to file" checkbox is left checked - that is, the "Log to file" checkbox greys out as if it were deactivated, but the next time you use WinSCP the "Enable logging" checkbox has re-enabled itself.

peter3731 wrote:

BTW, this is properly the subject of a bug-report, but I noticed that unchecking the "Enable logging" checkbox will not actually disable logging if the "Log to file" checkbox is left checked - that is, the "Log to file" checkbox greys out as if it were deactivated, but the next time you use WinSCP the "Enable logging" checkbox has re-enabled itself.

I do not think so. Please note that logging options set on login dialog and not saved unless you open a session.