That won't show you the public IP if you're behind a NAT. Why would you need the public IP instead of the private one? For example because you're trying to sear

That won't show you the public IP if you're behind a NAT. Why would you need the public IP instead of the private one? For example because you're trying to search for requests coming from that machin in some logs, take traffic traces from somewhere beyond the NAT, etc.