A good guide for DDNS and more
This is much easier to understand, read full text at:
DDNS is a technique that keeps on top of the IP address your ISP
assigned to you. Periodically, and fairly often, a program runs to find
out what your ISP provided internet IP address is at this moment.
Then a private company somewhere on the internet is contacted and
associates your current IP address with an internet name you provided to
them. The internet name is a composite of a name you chose and their
actual domain name. When someone on the internet enters that name in a
browser, they’re talking to you.
For example, Asus offers a free DDNS service for buyers of some of
the products they sell. I own an Asus router and use their DDNS service.
Within the router, I turned the DDNS feature on and entered a name.
Asus agreed the name was unique and established the link within a couple
of seconds. The router relays my current IP address to Asus DNS servers
several times a day. I now have an accessible internet presence at .