Troubleshooting – Linux Book Center

Error:

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

No supported authentication methods available

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

Solution:

Edit /etc/ssh/sshd_config configuration file using vi editor.
```
    [root@server ~]# vi /etc/ssh/sshd_config
```

Check and replace with yes for below entry

 PasswordAuthentication no

changed

PasswordAuthentication yes

save and exit from the file using :wq
Than restart the ssh service using below command.
```
systemctl restart sshd
```
Restart the network service using below command.
```
systemctl restart network
```
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