Unable to connect to EC2 instance & access over internet

What error message are you getting? For connection timeout, check if your network settings are correct (VPC, subnets, routing table, internet gateway and security group).

Refer to this AWS documentation for troubleshooting steps and links for other common errors and resolutions: https://aws.amazon.com/premiumsupport/knowledge-center/ec2-linux-ssh-troubleshooting/