DNS is to change an IP address to a domain name such as “abc.com” to make it easy to remember. DDNS is a management service to keep this domain name linked to a changing IP address as not all computers use static IP addresses.
Most of the global companies support DDNS service and we’d like to introduce one of them: “NO-IP”.
The biggest reason to pick NO-IP is because this USA company provides free DDNS service.
Another USA company, Dyn, had been supported free DDNS service until they suddenly stopped doing this. It adversely affected our ezTCP products embedded with Dyn service and we had to find an alternative.
(We have no idea why but it seems Dyn is more popular than NO-IP according to Google search engine.)
Getting to the point, how can we use this free DDNS service of NO-IP?
Firstly, we need to create an account at http://www.noip.com/.
Click [Sign Up]!
Enter a username, password, email address, etc., and click [Free Sign Up].
Input a hostname you’d like to register in the “Hostname”. It must be unique and you’d better register something appropriate and easy to remember. If you want to create an account but register a hostname later, just click the “Create my hostname later” check box.
Once you submit your account information, an email to confirm your registration will be sent to the address you provided.
Look for the email from NO-IP and activate your account by clicking the link in the confirmation email, and finally you are able to log into the NO-IP website as a member.
Click the “Manage Hosts” icon and you will find your hostname list.
The hostname you created when you join will be presented in this list. You can add one by clicking “Add A Host” if it’s empty. You’re allowed to add up to three hostnames for each free account.
We’re done with how to create an account and register a hostname. What we are going to do next is to make our computer accessible with the hostname, not the IP address.
No-IP also supports a free update client program available on a PC. Click [Dynamic Update Client] on the left menu.
Click “Download Now” to download an exe file and start installing.
Run the program after completing the installation.
You can log on with your account by pressing the [Edit] button and choose a hostname by pressing [Edit Hosts]. The green-coloured checks represent successful update, so now you are able to access to your computer by your hostname from anywhere in the world.
Note that free hostnames expire when they are not used for 30 days. So you must update them before it becomes invalid.
Detailed instructions for installing are available in the knowledge section of NO-IP website below.