Yes the point is to simply discover the public ip you present as on the internet. It's not a particularly hard problem to solve, but you often can't know your p

Yes the point is to simply discover the public ip you present as on the internet. It's not a particularly hard problem to solve, but you often can't know your public interface just from inside the machine. Being behind a NAT with TCP 80/443 forwarded to the actual web server is an example.