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Can not log in to recently enabled/configured sshd service

I have a pretty vanilla Cygwin installation on a Windows 2003 Server (SP1) system. Yesterday, I tried to enable the sshd service by running the ssh-host-config script. Everything appeared to work fine and I let the script create the two recommended user accounts. I was also able to start the sshd service successfully. However, I can not log in to the system. With the minimal /etc/passwd file, when I try to log in via ssh using a user that is not in the /etc/passwd file, it will not take my password at all (that's to be expected). I then added my account (as well as all the other accounts in our Windows domain) to the /etc/passwd file by running the following command:

mkpasswd -l -d >> /etc/passwd

Now when I try to log in I get immediately disconnected as shown in this debug output output:

# ssh -v av16209@gandalf
OpenSSH_3.9p1, OpenSSL 0.9.7a Feb 19 2003
debug1: Reading configuration data /home/av16209/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to gandalf [] port 22.
debug1: Connection established.
debug1: identity file /home/av16209/.ssh/identity type 0
debug1: identity file /home/av16209/.ssh/id_rsa type 1
debug1: identity file /home/av16209/.ssh/id_dsa type 2
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.7
debug1: match: OpenSSH_4.7 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.9p1
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'gandalf' is known and matches the RSA host key.
debug1: Found key in /home/av16209/.ssh/known_hosts:101
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Offering public key: /home/av16209/.ssh/id_rsa
Connection closed by

The home directory defined in the Cygwin /etc/passwd file is "// nasbox/av16209" which is the same home directory used on the Linux system that I initiated the ssh connection from (only there it's mounted as "/home/av16209"). I have got passwordless ssh access working from all my Linux systems, so that part is set up correctly.

Any ideas as to why this is failing on the Cygwin side?


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