Finally, make click in “ Add Domain” button (and maybe a few more clicks) to confirm the operation.Īlternatively, you can also choose to acquire your own domain for fewer as 15 dollars per year. After doing this, choose one of the domain names offered and write your hostname. If you want to use a free domain, click in the Free Domains Tab. Once logged in, go to “ Services – DNS Manager“. First of all, you need to create your own user in the service. Your own domain in ChangeIPĬreating you own domain in ChangeIP is very easy. We will explain in the next sections how to archive this. Nowadays I have moved to in order to integrate my WordPress hosting (where this blog lives), my internal website to control the domotic system and a DDNS service. In their webpage you can download a free software to automatically update your IP (you can find more information here). The bad part of this free provider is that they force you to login and confirm your hostname every 30 days. Their free service allows you to choose up to 3 hostnames in a list of available domains. There are a number of different providers that offer Dynamics DNS free of charge. So whenever your external IP address changes, the IP of the domain will be updated to reflect that change. With DDNS, the IP assigned to your domain name is automatically updated by a piece of software running in your Raspberry Pi. Most ISP offer free DNS services, however I would recommend for its speed to use Google’s DNS (8.8.8.8 and 8.8.4.4). Dynamics Domain Name System (DDNS)Ī Domain Name System (DNS) protocol is a part of the infrastructure of the and serves as the Internet phone book: every time you visit a website, instead of remembering all the telephone numbers/IP addresses “by heart”, you only need to type the name of the person/domain name (, for instance) you want to call/visit and your computer performs a DNS lookup to get the corresponding IP address. Unfortunately, it was not my situation. Otherwise, you will need to use a Dynamics DNS (DDNS) service to access your home network. This dynamism in the allocation of IP addresses makes very difficult to keep track of them. If you are lucky, your ISP provider may offer you an static IP for some money per month. During the period the router is disconnected, your old address could have already been assigned to another customer. Due to the shortage of IP addresses it is possible that after a router’s reboot you receive a new and different external address from your ISP. The main problem to access your internal network (where your Raspberry Pi is connected) from the internet is (at least in my case, it was) that domestic routers do not usually have an external static IP. In order to know your current external IP Address you can type the following command (it relies in a third-party website):

The router uses Network Address Translation ( NAT) or other similar method to match the internal IP address with the external requests received. All the devices inside the internal network use and share this same address to access internet. So, whenever you see an IP address inside this range there is no doubt: this is a private IP address.Īdditionally, the external interface of your router also has an external (or public) IP assigned by your Internet Service Provider (ISP). The Internet Assigned Numbers Authority (IANA) has reserved different IP address blocks for private networks. Each of the devices connected to your internal network also has an internal IP, which is usually managed and assigned by your router DHCP service, as explained in this post. The internal interface is connected to the internal network, and has an internal (or private) IP. Otherwise, I will explain very briefly what is the difference between an internal and an external IP address.Īs you can see in the image, a router usually has two (or more) interfaces connecting different networks. In this case, you can go directly to the next section. Maybe you already know the difference between an internal and an external IP. The validity of these methods will probably depend on your router and/or internet provider. However, and before starting, I have to admit that there are a lot of valid ways to archive this. Accessing your Raspberry Pi from your home network is cool, but if you want to build a domotic system it must be reachable from any internet connection. In this post we will cover a very common method to easily access your Raspberry Pi over the internet from another computer or mobile device: DDNS.

Opendns updater raspberry pi