Yeah, I use a similar thing for ec2: Host *.amazonaws.com User ec2-user IdentityFile ... And then it is just ssh ec2-X-X-X-X.compute-1.am

Yeah, I use a similar thing for ec2: Host *.amazonaws.com User ec2-user IdentityFile ... And then it is just ssh ec2-X-X-X-X.compute-1.amazonaws.com