====== DHCP server configuration ======

===== Installation =====
Download and install the package
<code bash>
sudo apt-get install isc-dhcp-server
</code>

===== Configuration =====
Specify the interfaces dhcpd should listen to in ''/etc/default/isc-dhcp-server'', for example:
<code bash>
INTERFACESv4="eno1np0"
</code>

Edit ''/etc/dhcp/dhcpd.conf'', for example:
<code bash>
# /etc/dhcp/dhcpd.conf
ddns-update-style none;
log-facility local7;
option domain-name-servers 192.168.1.1, 140.109.1.10, 8.8.8.8;
default-lease-time 86400;
max-lease-time 86400;

subnet 192.168.1.0 netmask 255.255.255.0 {
	option routers                  192.168.1.1;
	option subnet-mask              255.255.255.0;
	option broadcast-address        192.168.1.255;
	
	range 192.168.1.200 192.168.1.250;
}

# printer
host poplar {
	hardware ethernet XX:XX:XX:XX:XX:XX;
	fixed-address 192.168.1.11;
}

# server
host oak {
	hardware ethernet XX:XX:XX:XX:XX:XX;
	fixed-address 192.168.1.21;
}

# workstation
host sage {
	hardware ethernet XX:XX:XX:XX:XX:XX;
	fixed-address 192.168.1.101;
}
</code>

===== Activation =====
To start/stop/restart the service:
<code bash>
sudo service isc-dhcp-server start
sudo service isc-dhcp-server stop
sudo service isc-dhcp-server restart
</code>

===== Monitoring =====
To check dhcpd status:
<code bash>
sudo service isc-dhcp-server status
</code>

To see the leases:
<code bash>
more /var/lib/dhcp/dhcpd.leases
</code>

===== References =====
  * [[https://help.ubuntu.com/10.04/serverguide/C/dhcp.html]]
  * [[https://help.ubuntu.com/community/dhcp3-server]]
  * [[http://wiki.ubuntu-tw.org/index.php?title=UbuntuTW_Guide_ch15]]