User manual

The proper settings in the Fritz!Box
The settings int he router are clear now, and you can try your first experiment. For
this, you need the IP, but now not the one of the board's IP in your local network,
but your global IP. You can find it out on the page
http://www.meine-aktuelle-ip.de/
again. If you enter the IP determined there in your browser now, you should see
the website of the module. However, this time it is done taking the long path
through the internet. If you are not certain that your board can now actually be
reached online, you can use a smartphone with mobile internet to call the page. If
the Smartphone is not connected to your WLAN, it must call the page through the
internet.
The system set up by you is suitable for tests, but there are two problems with
practical use. The IP is not easy to remember, and it changes quite often. Most
routers reconnect once per day which will change the global IP of your router.
There is a remedy for these problems: The Domain Name System (in short: DNS).
This system enables you to call, e.g., www.google.de without having to enter the
IP. It encoders complicated IPs in easy-to-memorise names. Every normal website
uses DNS, and you also have a free way of using this system.
Several free websites offer DDNS. DDNS means Dynamic Domain Name System.
It is a serve that ensures that your IP is assigned to the right domain. I will present
the page http://www.anydns.info/ here, but you can use any other web service that
offers this service just the same.