playframework - How can I run play application to be visible across the network? -

i cloned application on amazon ec2. when type sbt run, runs on localhost (by way, can't @ via lynx, ok?)

tried sbt run -dhttp.port=port -dhttp.address=my.amazon.public.ip, regular browser this webpage not available on my.amazon.public.ip:port.

also need amazon, not heroku etc.

so, how can run application visible across network, not localhost?

just did not open port in security group. after that, worked.