Amazon-web-services – “Server refused our key” issue on connecting to Amazon Linux EC2 AWS image from Putty


I know this question has been asked and answered before, but I can't make it work although I triple-checked all the steps both in Amazon doc and here on StackOverflow.

So here we are: yesterday I launched an Amazon EC2 instance, with an Amazon Linux image – the one provided by Amazon themselves. I created a Key Pair for my Mac, and it's 100% fine – it works.

But today, trying to connect from work, from my PC, I can't make that work for Putty.

Steps I've done:

  • Created a new Key Pair
  • Used PuttyGen to transform the .pem file to .ppk
  • Created a new session on Putty, making sure that the host is (I won't paste my complete ec2 host obviously)
  • Associated to that session the private key I previously generated.
  • Try to connect from Putty.

What I get:

This message:
Using username "ec2-user".
Server refused our key

And the popup with Title "Putty Fatal Error" that says "Disconnected: No supported authentication methods available"

Please help, I've tried everything:

  • Changing user to root and ubuntu
  • generating my own public/private key using PuttyGen
  • putting the IP insteaad of the DNS name

Nothing works… And the worst thing is that yesterday from my Mac, with a different key-pair and using vSSH, it worked.

I don't get it.

Thanks in advance for your precious help.


Best Solution

Well yes, as said, you need to use the same key pair. Maybe I'm dumb but anyway, now it works :)

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