No supported authentication methods available

Error:

Disconnected: No supported authentication methods available (server sent: publickey,gssapi-keyex,gssapi-with-mic)

Receiving error When trying to access Linux server through putty or other tool using ssh service.

Solution:

1. Edit /etc/ssh/sshd_config configuration file using vi editor.

       [root@server ~]# vi /etc/ssh/sshd_config

2. Check and replace with yes for below entry

    PasswordAuthentication no

   changed 

   PasswordAuthentication yes

3. save and exit from the file using :wq
4. Than restart the ssh service using below command.

   systemctl restart sshd

5. Restart the network service using below command.

   systemctl restart network

6. Now try to access the server and sure it will work. Still if you are facing error in accessing the server, that there might be issue with firewall configuration.

Reference: Super user