ssh pubkey exchange failing at send_pubkey_test

[Hans-Georg Scherneck]

>     My cygwin runs on a Windows 7. My problem is similar to a previous one
>
>     * /From/: Christophe Sauthier<christophe dot sauthier at gmail dot com>
>     * /To/: Cygwin List<cygwin at cygwin dot com>
>     * /Date/: Wed, 13 Apr 2005 10:39:14 +0200
>     * /Subject/: Re: Strange behaviour of Openssh
>
>
>     however it's really different. My problem occurs earlier in the
>     process.
>
>     I try to log in with ssh passwordless into a server that I've set up. sshd
>     is running there. I can log in with password.
>     When I set up the crypto (ssh-keygen -t ecdsa) and install the pub key at
>     the host, I can't login anymore, not by defaulting to password either.
>
>
>
> How did you configure ssh?  Did you run ssh-user-config?
> Does it work with the default rsa key?
>
> --
> Larry


Larry,
yes, I configured with ssh-user-config
No, it does not work with RSA keys either.
After a renewed ssh-user-config on the host side, the debug looks the 
same (except ecdsa ->  rsa)
ssh -vvv -i .ssh/id_rsa.pub me@server
see debug output at 
http://froste.oso.chalmers.se/hgs/cygwin/ssh-login-rsa-failure.txt

Note that I do have success with different Windows XP and Vista 
machines. It's only this one Windows 7 case that's misbehaving.  And the 
problem is independent whether I log in from another cygwin or a linux 
machine. It's always that one server under W7.

I've put up host's /etc/ssh_config at 
http://froste.oso.chalmers.se/hgs/cygwin/ssh_config_at_host
and the server's sshd_ equivalently.

I'd very much like to inspect logfiles on the server's side. Despite 
that I've arranged for sshd-stdout.log sshd-stderr.log files in /var/log 
(they are created), and despite that I have installed and activated the 
syslog-ng package the logins, whether failing or succeeding (keys 
disabled and password dialog), leave no messages in any of the logfiles.
( cygrunsrv --install sshd --path /usr/sbin/sshd -1 /var/log/sshd-1.log 
-2 /var/log/sshd-2.log --args -e; cygrunsrv -S sshd )
I've also looked into the W7 event logs, in vain.

Other clues for narrowing in: I connect within the same IP-domain, 
machines sit side-by-side, I give the full address 
HGS@W7machine.oso.chalmers.se
and HGS is the user exactly as specified in /etc/passwd
Can the firewall prevent receiving the send_publickey_test ? Isn't 
send_publickey_test going thru port 22 too ?
ssh -i .ssh/id_ecdsa.pub HGS@W7machine.oso.chalmers.se
Any option I miss in the ssh command line?

-- 
Med vänliga hälsningar / With best regards yours             -----
Hans-Georg Scherneck                                       /   A   \
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