Amazon EC2 instance: Server refused our key

Question

I was working on an amazon ec2 instance for almost a week now.. I installed LAMP on my ubuntu instance then suddenly yesterday, when I try to connect via SSH on putty it gives me an error "Server refused our key" and "No supported authentication methods available (server sent: public key)

I am not sure what is causing this error since i did not change any settings on the aws console and on the instance itself. I was able to ssh before on the server. before I start setting up the server, I assigned an elastic IP to the instance.

Answer 1

I am in the process of setting up ubuntu-Wordpress on aws EC2 using a Bitnami AMI. I added SSH-based security in the last installation sted and thus downloaded a .pem private key. Trying to use putty to create a SSH-tunnel I ran into the wellknown putty login problems, both regarding username and private key. I solved them in the following way: 1) username should be "bitnami" (ec2-user is not working) 2) Using puttykey to convert the public SSH-key from .pem to .ppk (as putty demands private key in ppk format) I had to use SSH-1 (RSA) instead of the default parameter. By doing so putty gave perfect connection to the private IP of my EC2 instance. Hope this helps!