Ubuntu: How do I install and configure a DHCP server?

August 25, 2021 Alice AUSTIN

The Question: How to install and configure a DHCP server in Ubuntu 12.04?
I need a step-by-step tutorial if somebody has one.

Solutions Sample (Please watch the whole video to see all solutions, in order of how many people found them helpful):

== This solution helped 53 people ==
The first thing You need to do is install the packages we need.
Open up a terminal and type:
sudo apt-get install isc-dhcp-server
There are two main files /etc/default/isc-dhcp-server and /etc/dhcp/dhcpd.conf
which we will need to configure so lets take the first.
Open up a terminal and using your favorite text editor type:
sudo vim /etc/default/isc-dhcp-server
You should get the following:
#Defaults for dhcp initscript
#sourced by /etc/init.d/dhcp
#installed at /etc/default/isc-dhcp-server by the maintainer scripts
#
#This is a POSIX shell fragment
#
#On what interfaces should the DHCP server (dhcpd) serve DHCP requests”
#Separate multiple interfaces with spaces, e.g. “eth0 eth1”.
INTERFACES=”eth0″
Replace eth0 above with the name of your network interface that you want the
server to lease addresses on. Onto the next file.
Open up a terminal and type:
sudo vim /etc/dhcp/dhcpd.conf
which should give you the output below.
#
#Sample configuration file for ISC dhcpd for Debian
#
#Attention: If /etc/ltsp/dhcpd.conf exists, that will be used as
#configuration file instead of this file.
#
#
….
option domain-name “example.org”;
option domain-name-servers ns1.example.org, ns2.example.org;
option domain-name “comtech.com”;
default-lease-time 600;
max-lease-time 7200;
log-facility local7;
subnet 10.0.0.0 netmask 255.255.255.0 {
range 10.0.0.150 10.0.0.253;
option routers 10.0.0.2;
option subnet-mask 255.255.255.0;
option broadcast-address 10.0.0.254;
option domain-name-servers 10.0.0.1, 10.0.0.2;
option ntp-servers 10.0.0.1;
option netbios-name-servers 10.0.0.1;
option netbios-node-type 8;
……
}
This needs a little bit of explaining.
1. Adjust your settings according to your network requirements.
2. The option domain name is your dns zone name. For example mine
is set to comtech.com.
3. Range should be the range of ip addresses that you want the
server to give out to clients.
Now restart the dhcp service by typing:
sudo service isc-dhcp-server restart
Thats it!! Your dhcp server should be running, however it is best to check.
Open up a terminal and type:
sudo netstat -uap
which will show you something like the following (look for dhcpd, nmbd, and
named):
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program
name
udp 0 0 10.0.0.255:netbios-dgm *:* 1016/nmbd
udp 0 0 10.0.0.255:netbios-ns *:* 1016/nmbd
udp 0 0 *:bootps *:* 4525/dhcpd
udp 0 0 *:netbios-dgm *:* 1016/nmbd
udp 0 0 *:netbios-ns *:* 1016/nmbd
udp 0 0 chris-desktop:domain *:* 1273/named
udp 0 0 chris-desktop.lo:domain *:* 1273/named
udp 0 0 chris-deskt:netbios-dgm *:* 1016/nmbd
udp 0 0 chris-deskto:netbios-ns *:* 1016/nmbd
udp6 0 0 [::]:domain [::]:* 1273/named

With thanks & praise to God! With thanks to the many people who have made this project possible! | Content (except music & images) licensed under cc by-sa 3.0 | Music: https://www.bensound.com/royalty-free-music | Images: https://stocksnap.io/license & others | With thanks to the Stack Exchange Network (http://stackoverflow.com/questions/140126). Trademarks are property of their respective owners. Disclaimer: All information is provided “AS IS” without warranty of any kind. You are responsible for your own actions. Please contact me if anything should be amiss at Roel D.OT VandePaar A.T gmail.com.

source

by Roel Van de Paar

linux dhcp server