Comment by xomodo

For accessing aws ec2 instances behind nat/fw add this lines ~/.ssh/config:

  Host i-* mi-*
   ProxyCommand sh -c "aws ssm start-session --target %h --document-name AWS-StartSSHSession --parameters 'portNumber=%p'"
   UserKnownHostsFile /dev/null
   StrictHostKeyChecking no
   User ubuntu
   LogLevel ERROR
   DynamicForward 5060

Usage: `ssh -i key.pem i-0xxxxxxxxxx`. Last config line can be used for optional proxy browsing.