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dns_dynamicip.md
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# DNS with a dynamic IP
<div class="alert alert-warning">Before going further, make sure your global IP address is dynamic with: [ip.yunohost.org](http://ip.yunohost.org/). The global IP address of your box change almost every days.</div>
<div class="alert alert-warning">Before going further, make sure your global IP address is dynamic with: [ip.yunohost.org](http://ip.yunohost.org/). The global IP address of your box changes almost every day.</div>
This tutorial aim to get around dynamic IP issue who's nest: when the IP address public of the box change, the DNS zone is not update to point towards the new IP address.
This tutorial aim to get around dynamic IP issue which is: when the IP public address of your (Internet Service Provider-) box changes, the DNS zone is not updated to point towards the new IP address, and consequently your server is no more reachable via its domain name. After setting up the solution proposed in this tutorial, the redirection from your domain name to the actual IP address of your server will not be lost anymore.
After put in place the solution proposed in this tutorial, the redirection from your domain name to the real IP address will not be loose anymore.
The method proposed here consists of automatizing the fact the box annonces its global IP adress change to the dynamic DNS, so that the DNS zone will automatically be updated.
The method which will be put in place consist to make automatic the fact the box annonce to the dynamic DNS it has change global IP address, and then the DNS zone will automatically be changed.
If you own a domain name at **OVH**, you could go to step 4 and follow this [tutorial](OVH_fr) because OVH propose a DynDNS service.
If you own a domain name at **OVH**, you may go to step 4 and follow this [tutorial](OVH_fr), given that OVH proposes a DynDNS service.
#### 1. Create an account to a Dynamic DNS service
Here is sites which offer a DynDNS service free of charge:
Here are sites which offer a DynDNS service free of charge:
* [DNSexit](https://www.dnsexit.com/Direct.sv?cmd=dynDns)
* [No-IP](https://www.noip.com/remote-access)
* [ChangeIP](https://changeip.com)
* [DynDNS (in italian)](https://dyndns.it)
* [DynDNS with your own domain](https://github.com/jodumont/DynDNS-with-HE.NET)
Register to one of them.
Register to one of them. It should provide you with one (or more) IP address to reach the service, and a login (that you may be able to self-define).
#### 2. Move the DNS zones
Move the [DNS zones](dns_config), excepted the NS fields, from the [registrar](registrar_en) where you bought your domain name to the dynamic DNS service you registrer at step 1.
Copy the [DNS zones](dns_config), except for the NS fields, from the [registrar](registrar_en) where you bought your domain name from to the dynamic DNS service you registrer at in step 1.
#### 3. Toggle management of your domain name to the dynamic DNS server
This step consist to say to the [registrar](registrar_en) that DNS service will be manage by the DynDNS service.
Redirect NS field to the IP address gived by the DynDNS service.
#### 3. Switch the management of your domain name to the dynamic DNS server
This step consists in declaring to your [registrar](registrar_en) that the DNS service will now be managed by the DynDNS service provider.
Then, remove [DNS zones](dns_config), excepted NS fields, from the [registrar](registrar_en).
For this, fisrt declare in the NS field(s) the IP address provided by the DynDNS service.
#### 4. Create a Dynamic DNS login
On the dynamic DNS service create a login that you will enter on a dynamic DNS client.
This client could be your box or a package installed on your server as `ddclient`.
We gone use the client installed on the box which is more easy way.
Then, remove any other item in the [DNS zones](dns_config) (except the previous NS fields), from the [registrar](registrar_en).
#### 5. Configure the box
Put the login of the dynamic DNS and the [public IP address](http://ip.yunohost.org/) on your box.
#### 4. Configure the client
This client could be your ISP-box, or a package installed on your server, such as `ddclient`.
Here, we will use the client provided by the box, which is the more easy way.
Enter the login of the dynamic DNS and its public IP address in your box (interface details may vary by ISP).
<img src="/images/dns_dynamic-ip_box_conf.png" width=600>
You're good to go !