This is the mail archive of the
mailing list for the Cygwin project.
Re: ssh pubkey exchange failing at send_pubkey_test
- From: Hans-Georg Scherneck <hgs at chalmers dot se>
- To: cygwin at cygwin dot com
- Date: Sat, 21 Jan 2012 11:10:36 +0100
- Subject: Re: ssh pubkey exchange failing at send_pubkey_test
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
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?
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
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
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
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 \
---------------------+----------------------------------- | / \ |
. Telephone& -fax | Chalmers University of Technology \ /
. +46 31 772 5556 | Earth and Space Sciences -----
. +46 31 772 5590 fx |& Onsala Space Observatory | |
. E-Mail: | SE-439 92 Onsala, Sweden / \
. hgs at chalmers.se | http://www.chalmers.se/rss ----------------
. Ocean Loading Serv.| froste.oso.chalmers.se/loading /===\ ,===//===\
. Gravimeter | froste.oso.chalmers.se/hgs/SCG / /`===,/ /
Problem reports: http://cygwin.com/problems.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple