I am using an ubuntu 12.04 vps server with ubuntu-desktop.

I have configured the login with ssh over a key-file with passphrase.

The key is generated with the putty keygen.exe

The login over putty with the key-file worked fine (with PasswordAutentication = no)!

 

Now if I want to login with X2Go, I have to put in my password (passphrase for the private key) 3 times and after that I reached the following failure message:

"Access denied. Authentication that can continue: publickey,password"

 

In the Auth.log is following entry that time:
sshd[***]: Received disconnect from **.**.**.**: 11: Bye Bye [preauth]

 

If I change "PasswordAuthentication = yes" in my sshd_config-File and delete the key from the RSA-/DSA-Key Field in X2Go, I am able to connect with X2Go to my server.

 

What can be wrong? Why doesn't work X2Go over myssh keyfile?

I would be happy if anybody can help me!