SSH Public Key - No supported authentication methods available (server sent public key)
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Published on 2012-10-22T01:10:02Z
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2012/11/01
5:17 UTC
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I have a 12.10 server setup in a virtual machine with its network set to bridged (essentially will be seen as a computer connected to my switch).
I installed opensshd via apt-get
and was able to connect to the server using putty with my username and password.
I then set about trying to get it to use public/private key authentication. I did the following:
- Generated the keys using PuttyGen.
- Moved the public key to /etc/ssh/myusername/authorized_keys (I am using encrypted home directories).
Set up sshd_config like so:
PubkeyAuthentication yes
AuthorizedKeysFile /etc/ssh/%u/authorized_keys
StrictModes no
PasswordAuthentication no
UsePAM yes
When I connect using putty or WinSCP, I get an error saying No supported authentication methods available (server sent public key).
If I run sshd in debug mode, I see:
PAM: initializing for "username"
PAM: setting PAM_RHOST to "192.168.1.7"
PAM: setting PAM_TTY to "ssh"
userauth-request for user username service ssh-connection method publickey [preauth]
attempt 1 failures 0 [preauth]
test whether pkalg/pkblob are acceptable [preauth[
Checking blacklist file /usr/share/ssh/blacklist.RSA-1023
Checking blacklist file /etc/ssh/blacklist.RSA-1023
temporarily_use_uid: 1000/1000 (e=0/0)
trying public key file /etc/ssh/username/authorized_keys
fd4 clearing O_NONBLOCK
restore_uid: 0/0
Failed publickey for username from 192.168.1.7 port 14343 ssh2
Received disconnect from 192.168.1.7: 14: No supported authentication methods available [preauth]
do_cleanup [preauth]
monitor_read_log: child log fd closed
do_cleanup
PAM: cleanup
Why is this happening and how can I fix this?
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