Outside IP address

[Adam Myrow]

The only way I know of to determine your outside IP address is to connect 
to the router's built-in web server and try and find where it is in its 
menus.  Otherwise, you could connect to some server which shows your 
current IP address.  As far as your Linux machine is concerned, your IP 
address is whatever your router gives it, and it has no knowledge of the 
NAT that the router is doing.