Why is my SSH connection being closed immediately after pubkey auth succeeds?

Question

I've two windows machine and trying to SSH using CYGWIN. It works fine when password prompted. However, when I generated the private/public pair, looks like authentication succeeded, but got the connection closed error.

Here's the detail logs: Please help

debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/502537203/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug1: Authentication succeeded (publickey).
Authenticated to hostname ([x.x.x.x]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting [email protected]
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: send packet: type 1
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
  #0 client-session (t3 r-1 i0/0 o0/0 fd 4/5 cc -1)

Connection to hostname closed by remote host.
Connection to hostname closed.
Transferred: sent 2056, received 1500 bytes, in 0.0 seconds
debug1: Exit status -1

Solution

It's working now. I did the following

1. set the permission for ~/.ssh 0700
2. all the files under ~/.ssh 0600
3. run the sshd service as cyg_server id (created during ssh-host-config)
4. edit /etc/sshd_config to allow PubkeyAuthentication yes

Comments

[Admin]

You're doing your part just fine, it's the remote server that closes the connection. Look at the logs of the remote machine.

[Admin]

In which location of the server, I need to check for logs.

[Admin]

Check under \cygwin\var\log\messages

[Giacomo Catenazzi]

There is a debug1: Authentication succeeded (publickey)., so this and the other answers are wrong (for this specific case)