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Rewrite english part of dhcp.md

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Maniack Crudelis 2020-03-29 20:32:53 +02:00
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dhcp.md
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Using Pi-hole as your DHCP server Using Pi-hole as your DHCP server
================== ==================
> **Be carreful, you should considering that playing with your DHCP may break your network. > **Be careful, you should considering that playing with your DHCP may break your network.
In case in your server become to be down, you're going to lose your dns resolution and your ip address. In case your server is down, you will lose your dns resolution and ip address.
By this way, you'll losing any internet connection and even the connection to your router.** So, you will lose any internet connection and even the connection to your router.**
> **If you encounter that kind of problem, please see "How to restore my network" at the end of this document.** > **If you encounter this kind of problem, please see "How to restore my network" at the end of this document.**
### How to configure Pi-hole ### How to configure Pi-hole
There two ways to configure Pi-hole to be used as your DHCP server. There're two ways to configure Pi-hole to be used as your DHCP server.
- Either you can choose to use it when you're installing the app. - Either you can choose to use it when you install the app.
- Or you can activate the DHCP server after in the "Settings" tab, "Pi-hole DHCP Server" part. - Or you can activate the DHCP server afterwards in the "Settings" tab, "Pi-hole DHCP Server" part.
In this second case, it can be better to set the ip of the server to a static address In this second case, it can be better to set the ip of the server to a static address
### How to configure my router ### How to configure my router
Your personnal router or the router of your ISP brings a DHCP server activate by default. Your personal router or ISP's router has a DHCP server enabled by default.
If you keep this DHCP, at the same time of Pi-hole's one, you will encouter a transparent conflict between them. If you keep this DHCP, along with Pi-hole's one, you will have transparent conflicts between them.
The first responding DHCP will distribute its own ip and parameters. The first DHCP to respond will distribute its own ip and settings.
So you have to turn off the DHCP of your router to let Pi-hole managed your network. So you have to turn off the DHCP of your router to let Pi-hole managed your network.
#### Why do I should use only the DHCP of Pi-hole ? #### Why should I use only the DHCP of Pi-hole ?
By using the DHCP of Pi-hole, you'll allow it to give at each of your client its dns configuration. Like that, each of your request will be filtering by Pi-hole. By using the DHCP of Pi-hole, you allow Pi-hole to give at each of your client its dns configuration. This way every requests will be filtered by Pi-hole.
An another use case of using Pi-hole's DHCP is if you have some hairpinning problems (You can't connect to your server because its IP is your public IP, and your router doesn't allow that). Another use case of using Pi-hole's DHCP is if you have hairpinning problems (You can't connect to your server because its IP is your public IP, and your router doesn't allow that).
In this case, use the dns of Pi-hole will allow you to connect to your server by its local adress instead of its public one. In this case, using Pi-hole's dns will allow you to connect to your server by its local address instead of its public one.
### How to restore my network ### How to restore my network
> Oh crap ! > Oh crap !
Your Pi-hole is down, and you don't have a DHCP anymore. Your Pi-hole server is down, and you don't have a DHCP anymore.
Don't panic, we can overcome it \o/ Don't panic, We'll get through it. \o/
Use your favorite terminal on your desktop computer. Use your favorite terminal on your desktop computer.
And first, get your main interface (`eth0` in most cases). And first, get your main interface (usually `eth0`).
``` bash ``` bash
sudo ifconfig sudo ifconfig
``` ```
@ -45,8 +45,8 @@ Then, set your ip as a static ip.
sudo ifconfig eth0 192.168.1.100 sudo ifconfig eth0 192.168.1.100
``` ```
Now, you can connect to your router and turn on its DHCP server to reuse it. Now, you can connect to your router and turn on its DHCP server to use it again.
You can now reset your ip and get a dynamic address You can now reset your ip and get a dynamic address.
``` bash ``` bash
sudo ifconfig eth0 0.0.0.0 && sudo dhclient eth0 sudo ifconfig eth0 0.0.0.0 && sudo dhclient eth0
``` ```