On 4/16/2014 2:35 AM, Corinna Vinschen wrote:
Hi Ken,
On Apr 16 10:04, Corinna Vinschen wrote:
On Apr 15 14:14, Ken Brown wrote:
I've come across a glitch involving sshd and cygserver. I normally
have both running, but I've discovered that I have to start sshd
before I start cygserver, or else I have problems (can't ssh from a
non-administrator account to an administrator account). Here are
the details on 64 bit Cygwin; I haven't tested 32 bit:
I've installed the full 2014-04-12 snapshot and removed /etc/passwd
and /etc/group. I have an ordinary user kbrown and an administrator
user kbrown-admin. I now do the following:
1. Start sshd.
2. Start cygserver.
3. Start a Cygwin Terminal as user kbrown.
4. ssh into the kbrown-admin account (with publickey authentication
used by default).
$ ssh kbrown-admin@localhost
Enter passphrase for key '/home/kbrown/.ssh/id_rsa':
setsockopt IPV6_TCLASS 16: Protocol not available:
Last login: Tue Apr 15 13:57:12 2014 from fe80::9956:cbba:6928:151c%11
Everything is fine.
Now I close the Cygwin Terminal, stop both services, and restart
them in the other order (cygserver first, then sshd). Repeating
steps 3 and 4, I can't login:
$ ssh kbrown-admin@localhost
kbrown-admin@localhost's password:
Permission denied, please try again.
kbrown-admin@localhost's password:
Notice that (a) I didn't get a prompt for the passphrase for my ssh
key, and (b) my password wasn't accepted.
Thanks for the report, Ken. I'll have a look.
To clarify: This is a non-domain machine, right? And sshd is running
under the cyg_server account while cygserver is running under the
LocalSystem account?
Yes to all.
I'm just testing this, only with a domain machine and domain accounts,
and I can't reproduce this. I have a bit of a problem to test this on a
non-domain machine because my network is set up for domain machines...
However, I found that I made a blatant mistake in cygserver. The
message length was computed one byte too short, so the trailing \0 in
the passwd/group string wasn't transmitted. This *might* be the cause
for your problem.
I just built a new snapshot. Can you please try if this fixes it for
you? Make sure to use the new cygserver!
Yes, that fixed it. Thanks.
While I was at it, I also added a patch to get rid of the "setsockopt
IPV6_TCLASS 16: Protocol not available" message.
Good. It's nice to see that anymore.
Ken
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
