Opening Ports for Tomcat

Hit on Add Rule.
Then under Type, select Custom TCP Rule.
Then, under Port Range enter 8080. Hit on Save.

Now, while you are here, you might as well open a port for Jenkins. You will now repeat the same steps you just completed, except under Port Range you should enter 8090.
Hit on Add Rule.
Then under Type, select Custom TCP Rule.
Then, under Port Range enter 8090. Hit on Save.

If you open a browser on your local machine and go to your AWS instances' dns name, you should see Tomcat running: