On Fri, May 30, 2014 at 1:58 PM, Michael Hennebry hennebry@web.cs.ndsu.nodak.edu wrote:
I've done my experiments. The primary one was connecting both computers to the router. My Windows box is booted to CentOS at the moment.
Apparently CenturyLink is not giving me any globally visible (inside global?) IP address. ifconfig gives me a different 192.168.*.* (inside local?) address on each computer. When I ssh to a globally visible machine, the return addresses (63.155.*.*) are the same and the port numbers are different.
Apparently both machines are invisible to the outside world so long as they do not make outbound connections.
Yes, that is the normal 'home router' mode where the internet-facing connection gets the public IP addres and the LAN side uses a private range that will be source-NAT'ed to the single public address on outbound connections. The router should also have options to port-forward inbound connections to an inside address, either for a specific port or all of them (DMZ mode) if you do want to accept them - assuming you have the admin password.