Internal and External IP Addresses Explained
https://stevessmarthomeguide.com/internal-external-ip-addresses/ – What is the difference between and Internal and external Ip address? How do they work. Why do they always use the same IP address range?
In this video we look at small home/office networks and how IP addresses are assigned and how they communicate on the Internet.
You might also want to look at this tutorial -http://www.steves-internet-guide.com/understanding-port-forwarding/ –
on the website which cover NAT routers in more detail.
Other videos
What is Port Forwarding
setup Port forwarding on home router
Dynamic DNS
ip address
