Tuesday, July 24, 2012

Authentication refused: bad ownership or modes for directory - autologin ssh


Auto Login SSH is not working properly.


Even though I have followed the guide line auto login ssh, but It didn't work as I expected. It always asking for user password.

Run the below command to take any clue about what was gone wrong.

ssh -v dave@new-server.com

OpenSSH_5.2p1, OpenSSL 0.9.8l 5 Nov 2009
debug1: Reading configuration data /etc/ssh_config
debug1: Connecting to new-server.com [12.34.56.78] port 22.
debug1: Connection established.
debug1: identity file /Users/dave/.ssh/identity type -1
debug1: identity file /Users/dave/.ssh/id_rsa type 1
debug1: identity file /Users/dave/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3
debug1: match: OpenSSH_4.3 pat OpenSSH_4*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.2
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr 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 'new-server.com' is known and matches the RSA host key.
debug1: Found key in /Users/dave/.ssh/known_hosts:8
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_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: Next authentication method: publickey
debug1: Trying private key: /Users/dave/.ssh/identity
debug1: Offering public key: /Users/dave/.ssh/id_rsa
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: Trying private key: /Users/dave/.ssh/id_dsa
debug1: Next authentication method: password
dave@new-server.com's password:
Above log was not helpful to troubleshoot the issue, but I check the secure log of the remote server by issuing the below command.

Tail -F /var/log/secure
Sep 14 01:26:31 new-server sshd[22107]: Authentication refused: bad ownership or modes for directory /home/dave/
Sep 14 01:26:46 new-server sshd[22108]: Connection closed by 98.76.54.32

Checked the Permission of below Folders in Remote server
  1. .ssh
  2. authorized_keys
  3. /home/dave/

Set the below permission to .ssh and authorized_keys

  • chmod 600 .ssh/authorized_keys 
  • chmod 700 .ssh 

But this is also didn't correct my problem then check my Home Folder Permission by issuing below command.

  • Ls -la /home/dave
drwxr-xrwx 11 dave       dave        20480 2012-07-24 16:18 dave

Then I set the permission only to user.

 Chomd 700 /home/dave/
This was solved my problem and I was able to login without password. 

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