Amazon ubuntu ssh putty fail, WinScp works

2

I have two Amazon EC2 instances.
In both I can use WinSCP to connect using the putty public key ppk.
Putty used to work but now for some reason I can't SSH into these instances

Username: ubuntu then the Public DNS
(IPv4)ec2-52-27-17-227.us-west-2.compute.amazonaws.com.

  • I tried on two windows pc: both fail.
  • I switched the firewall off - fail. ERROR: --- Disconnected: No supported authentication methods available (server sent: publickey) ---
  • I followed almost every tutorial from scratch but there is only so much you can do.

I would be very grateful if someone can help.

gabrielkolbe

Posted 2017-02-27T12:54:13.580

Reputation: 21

For anyone struggling with this I found the answer, the new version of putty keygen does not have SSH-2 only SSH-1, I recreated my ppk files with SSH-1 and voila ! – gabrielkolbe – 2017-02-27T13:13:28.027

Got one to work but not the other - still a mystery – gabrielkolbe – 2017-02-27T13:59:22.767

Welcome on SuperUser. Remeber that you can [edit] your post when you want to update it... You have an answer, give it a look and in case upvote and accept it. – Hastur – 2017-03-01T15:04:12.463

Answers

1

You can generate SSH-2/RSA key pair from puttygen, the radio button is now labeled RSA.

Put the public key in the authorized_keys file under the directory .ssh of your user. Remember to chmod 600 the autohorized_keys file and chmod 700 the .ssh directory

Federico Galli

Posted 2017-02-27T12:54:13.580

Reputation: 248

Asked: 2017-02-27T12:54:13.580

Viewed: 128 times

Active: 2017-03-01T15:02:19.367