On Mon, Aug 03, 2020 at 02:15:17PM -0500, David Wright wrote: > The home PC that I'd be trying to contact has a 192.168.n.n IP address > given to it by my primary router. But the router's external address is > obtained by its DHCP client talking to my ISP's DHCP server.
In a case like that, just contact an external web site that tells you what your externally visible IP address is. There are many of them. Mine is <http://wooledge.org/myip.cgi>.
