OpenSSH login failing thru PuTTY/plink

[Chap Harrison]

Hi,

I've installed and configured OpenSSH on two Windows 2003 Server / Cygwin machines ("chaplab1" and "chaplab2").  I've tried, with PuTTY and plink.exe on a Windows 2003 machine on the same LAN, to connect chaplab2, and get "failed to authenticate".  But I *can* PuTTY to chaplab1/Cygwin, and from its command line I can ssh into chaplab2.

All three nodes are on 192.168.*

Both chaplab1 and chaplab2's host.allow & host.deny files are identical:

host.allow:
sshd: ALL

host.deny:
ALL:ALL EXCEPT localhost AND '192.168.':DENY

In fact, chaplab 1&2 should be identical in as many ways as possible.

Can anyone suggest a next step to try?

Thanks
Chap

[Jurriaan Kalkman]

From: Chap Harrison <clh@...>
Date: Wed, Jul 15, 2009 at 08:16:05AM -0700

>
> Hi,
>
> I've installed and configured OpenSSH on two Windows 2003 Server / Cygwin
> machines ("chaplab1" and "chaplab2").  I've tried, with PuTTY and plink.exe
> on a Windows 2003 machine on the same LAN, to connect chaplab2, and get
> "failed to authenticate".  But I *can* PuTTY to chaplab1/Cygwin, and from
> its command line I can ssh into chaplab2.
>
> All three nodes are on 192.168.*
>
> Both chaplab1 and chaplab2's host.allow & host.deny files are identical:
>
> host.allow:
> sshd: ALL
>
> host.deny:
> ALL:ALL EXCEPT localhost AND '192.168.':DENY
>
> In fact, chaplab 1&2 should be identical in as many ways as possible.
>
> Can anyone suggest a next step to try?
>

any messages in the ssh logs on the servers? Any difference if you run
sshd with debug on on the servers?

Kind regards,
Jurriaan
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[Chap Harrison]

Jurriaan Kalkman wrote:

any messages in the ssh logs on the servers? Any difference if you run
sshd with debug on on the servers?

This probably isn't what you mean, but -- I looked in /var/log/.  sshd.log is length 0 and hasn't been touched in several weeks.  The only file with a current modification timestamp is lastlog, which contains nothing of interest (mainly binary zeroes).  To activate sshd debugging, I used the Windows Computer Management > Services panel and gave '-d 5' as a start parameter; started the sshd service, attempted a login, stopped the service, and looked at sshd.log.  It was still zero length.

So - what must I do to get ssh logging and useful sshd debugging information?

Best regards,
Chap