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I'm having trouble gaining SSH access to my new server. I currently have one server set up working the way I want it to, and I'm trying to get a different one to work the same way. I've copied my users files (/etc/passwd, /etc/shadow, /etc/group, and /etc/gshadow) and the /home folders (including /home/*/.ssh). I even added a new user (testuser) on the new machine and am using that to test the ssh settings. Both /etc/ssh/sshd_config and /etc/ssh/ssh_config are the same, as are the iptables rules.

When I try to use PuTTY to log in to the new server using a copy of the settings from the old server (except for address, of course) I get an error:

Disconnected: No supported authentication methods available

And in the /var/log/secure file I get the line:

sshd[6562]: Received disconnect from 14: No supported authentication methods available

Both old and new server are running centOS

Where else can I find configurations that might be off?


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up vote 1 down vote accepted

Doesn't look like a firewall/ipteables issue. More likely you have either broken your passwd/shadow config (perhaps the new machine uses a different password hashing) or ssh is configured to allow key authentication only, not password.

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Both the old and new servers use only key authentication. The passwd/shadow files were copied as-is, and then just to be sure I did useradd tempuser and copied the .ssh folder from my old home directory to this directory. I copied /etc/ssh/sshd_config from the old machine to the new, and ran service sshd restart. Am I missing anything? – Max Jun 9 '11 at 12:14
Permissions on the /home/username/.ssh/ directory and files in it? – HampusLi Jun 9 '11 at 12:15
It was permissions!!!! Thank you! I guess when I copied everything I was root, so I went through and chowned everything back to what it needed to be. Thanks! – Max Jun 9 '11 at 12:23

Maybe PAM authentication settings differ? Look in /etc/pam.d/ and /etc/security/.

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