How to access/ping a server located on AWS?

Using UI:

In your security group:

• Click the inbound tab
• Create a custom ICMP rule
• Select echo request
• Use range 0.0.0.0/0 for everyone or lock it down to specific IPs
• Apply the changes
• and you'll be able to ping.

Using cmd: To do this on the command line you can run:

• ec2-authorize <group> -P icmp -t -1:-1 -s 0.0.0.0/0