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Sshd and key based authentication


I'm trying to set up sshd on a Windows 2003 domain controller.
Everything works with password authentication; however I need this for a script, so, in order to get non-interactive login, I must use keys. Tried as hard as I could, but I could not achieve this: I'm always asked for a password.

I read several posts which say I need to use local accounts, not domain accounts; however, the machine being a DC, I don't have Local security policy or Local users in Control panel or Administrative tool.

So, this is the fragment from my /etc/passwd:
sshd:unused:2259:513:sshd privsep,U-MYDOMAIN\sshd,S-X-X-XX-XXXXXXXXXX-XXXXXXXXXX-XXXXXXXXXX-XXXX:/var/empty:/bin/false

"ssh -vvv" suggest the key is presented to the server, but key authentication does not succeed anyway. Nothing special is logged server-side and ssh moves on to password authentiation.

On with the questions...

Is this supposed to work? Several posts say so, but no one mentions a domain controller... Does it bring in anything special?

Are the above users correct? Any problem with it?

What are correct ownership and permissions of /home, /home/myuser, /home/myuser/.ssh and /home/myuser/.ssh/authorized_keys?

According to some how-tos, ssh-host-confing should have prompted with "CYGWIN=" and I should have replied "tty ntsec", but this did not happen. Other how-tos suggest putting this variable in the environment. Is this information current or obsolete? I tried and it didn't seem to matter...

Any other hint?

 bye & Thanks

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