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Installing  DHCP Server in debian linux is not that hard actually…

I assume you have the following configuration on your host:

2 internal nics:
eth0 (For internal  )
eth1 (for internet)

1. Setting up your eth0 for dhcp use

The most important thing you need to do is configuring static ip adresses.

I will use the following IP adress 192.168.10.x as my ip-adress range.

We type the following command: nano /etc/network/interfaces

And be sure the settings are the same as below:

auto eth0
iface eth0 inet static
address 192.168.10.1
netmask 255.255.255.0
network 192.168.10.0
broadcast 192.168.10.255

After you have modified the file press control+x you will get a confirmation telling you to save the file yes or no.. We do Y and press Enter

restart the network interface type:

/etc/init.d/networking restart

And press enter.

2. Install and configure the dhcp server

If you have completed the step above we are going to install the dhcp and configure it.

First lets install the module:

apt-get install dhcp3-server

After a while it gives a blue screen with a warning. Just press enter and let him install.

When it finished installing the server will not start. We need to bind him to a interface and give a IP range to lease.

2.1 Binding the interface

Enter the following command

nano /etc/default/dhcp3-server

Press enter

Edit the following line

INTERFACES=”"
To
INTERFACES=”eth1″

After you have modified the file press control+x you will get a confirmation telling you to save the file yes or no.. We do Y and press Enter

2.2 configuring the DHCP Release

We are at the final step and after that we have a full DHCP Server Running!

We are not going to use the default config file of the dhcp server however we are going to keep a copy of the config file.

go to the following directory:

cd /etc/dhcp3/

Make a backup copy of the following config file by typing the following command:

cp dhcpd.conf dhcpd.old.conf

And press Enter.

Now remove the file that you have backuped

rm dhcpd.conf

We make the new dhcpd.conf in this step as I promised type:

nano dhcpd.conf

Now  copy/paste the following data into the file

subnet 192.168.10.0 netmask 255.255.255.0 {
range 192.168.10.10 192.168.10.100;
option domain-name-servers 192.168.1.1;
option domain-name “Failserver.nl”;
option netbios-name-servers 192.168.10.1;
option routers 192.168.10.1;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.10.255;
default-lease-time 86400;
max-lease-time 676800;
}

After you have modified the file press control+x you will get a confirmation telling you to save the file yes or no.. We do Y and press Enter

Now restart the DHCP3 server

/etc/init.d/dhcp3-server restart

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