AWS – Disconnected : No supported authentication methods available (server sent :publickey)

amazon-web-servicesputty

I am facing the issue in connecting server via putty. The error is showing me is "Server Refused our key: AWS – Disconnected: No supported authentication methods available (server sent:publickey)".

I am logging in with username " ubuntu ".I checked lots of websites but I didn't find any solution. I create a new key-pair file( .pem ) and tried again that's also is not working.
I am using the same key name for the pem file. Then using pem file I am creating a ppk file and then it is not working

Best Answer

When we convert your .pem file to .ppk it creates a public and private key of it's own inside the .ppk file like this: 

PuTTY-User-Key-File-2: ssh-rsa
Encryption: none
Comment: imported-openssh-key
Public-Lines: 6
AAAA***
***
***
***
...
Private-Lines: 14
AAA***
***
***
***
...
Private-MAC: ***

To connect to the server, you need to append the six lines of public key above into authorized_keys file in server user's /home/.ssh directory.

Note: Make sure the syntax is correct in authorized_keys file. For rsa keys it is like this:

ssh-rsa AAA***(whole public key in one line without pressing enter)***

Related Question