Getting started with maven :

REF : Maven docs

Error connecting to your instance: Connection timed out

Solution : Check your security group of the instance created which will allows inbound traffic from your public IP address on the proper port.

REF : aws docs

amazon ec2 server refused our key

Solution

1. Provide the username

ex : user-name@public-DNS.com

Genral user : root or ec2-user.

REF : awazon docs