如何安裝Ubuntu DHCP Server

安裝環境Ubuntu 12.04, 14.04 或 16.04
安裝套件

$ sudo apt-get install isc-dhcp-server -y

配置DHCP Server

$ sudo vim /etc/dhcp/dhcpd.conf

新增下面內容：

default-lease-time 600;
max-lease-time 7200;
option domain-name "mydomain.example";
subnet 192.168.1.0 netmask 255.255.255.0 {
  range 192.168.1.10 192.168.1.100;
  range 192.168.1.150 192.168.1.200;
  option subnet-mask 255.255.255.0;
  option broadcast-address 192.168.1.255;
  option routers 192.168.1.1;
  option domain-name-servers 192.168.1.1, 192.168.1.2;
}

修改/etc/default/isc-dhcp-server

$ sudo vim /etc/default/isc-dhcp-server

找到INTERFACES=""這行並修改，指定DHCP Server所使用的網路卡：

INTERFACES="eth2"

修改/etc/network/interfaces

$ sudo vim /etc/network/interfaces

配置eth2網路卡，新增下面內容：

auto eth2
iface eth2 inet static
    address 192.168.1.1
    netmask 255.255.255.0

讓eth2網路卡設定生效

# Ubuntu 14.04
$ sudo ifdown eth2; sudo ifup eth2

# Ubuntu 12.04
$ sudo service networking restart

重新啟動DHCP Server

$ sudo service isc-dhcp-server restart

DHCP Server 啟動|停止|狀態

$ sudo service isc-dhcp-server start|stop|status

開機不要啟動DHCP Server

# Ubuntu 16.04
$ sudo update-rc.d isc-dhcp-server disable

# Ubuntu 14.04 與 Ubuntu 12.04
$ echo manual | sudo tee -a /etc/init/isc-dhcp-server.override

開機啟動DHCP Server

# Ubuntu 16.04
$ sudo update-rc.d isc-dhcp-server enable

# Ubuntu 14.04 與 Ubuntu 12.04
$ sudo rm -f /etc/init/isc-dhcp-server.override

安裝環境Ubuntu 10.04
安裝套件

$ sudo apt-get install dhcp3-server -y

配置DHCP Server

$ sudo vim /etc/dhcp3/dhcpd.conf

新增下面內容：

default-lease-time 600;
max-lease-time 7200;
option domain-name "mydomain.example";
subnet 192.168.1.0 netmask 255.255.255.0 {
  range 192.168.1.10 192.168.1.100;
  range 192.168.1.150 192.168.1.200;
  option subnet-mask 255.255.255.0;
  option broadcast-address 192.168.1.255;
  option routers 192.168.1.1;
  option domain-name-servers 192.168.1.1, 192.168.1.2;
}

修改/etc/default/dhcp3-server

$ sudo vim /etc/default/dhcp3-server

找到INTERFACES=""這行並修改，指定DHCP Server所使用的網路卡：

INTERFACES="eth2"

修改/etc/network/interfaces

$ sudo vim /etc/network/interfaces

配置eth2網路卡，新增下面內容：

auto eth2
iface eth2 inet static
    address 192.168.1.1
    netmask 255.255.255.0

讓eth2網路卡設定生效

$ sudo /etc/init.d/networking restart

重新啟動DHCP Server

$ sudo /etc/init.d/dhcp3-server restart

DHCP Server 啟動|停止|狀態

$ sudo /etc/init.d/dhcp3-server start|stop|status

開機不要啟動DHCP Server

$ sudo update-rc.d dhcp3-server disable

開機啟動DHCP Server

$ sudo update-rc.d dhcp3-server enable