Ubuntu-16.04 Building DHCP Service

Ubuntu-16.04 Building DHCP service One, what is DHCP

DHCP (Dynamic Host Configuration Protocol) is commonly used in large local network environment, the main role is centralized management, assigning IP address, so that the host in the network environment to obtain the dynamic IP address, gateway address , DNS server address and other information, and can increase the usage of the address.

Second, install the DHCP service software

Install Isc-dhcp-server:

sudo apt-get install isc-dhcp-server

Third, configure the DHCP service

There are two main configuration files for DHCP, respectively, in/etc/default/isc-dhcp-server and/etc/dhcp/dhcpd.conf. The next thing to do is to configure these two files.

2. View native Network information
   
   Assume that ens160 the network card is an external network card
   Suppose ens192 the NIC is an intranet network card

4. Configuration isc-dhcp-server
   
   Modify the listening port INTERFACES to the intranet NIC nameens192
   
   Save exit

6. Configure hdcpd.conf
   
   Modify Configuration
   

   subnet 10.0.0.0 netmask 255.255.255.0 {range 10.0.0.10 10.0.0.100;option domain-name-servers 202.206.192.33, 223.5.5.5;option domain-name "mylab.com";option subnet-mask 255.255.255.0;option routers 10.0.0.1;option broadcast-address 10.0.0.255;default-lease-time 600;max-lease-time 7200;}

   Line by row explanation

   #subnet后跟子网网段，netmask后跟子网掩码subnet 10.0.0.0 netmask 255.255.255.0 {#地址池range 10.0.0.10 10.0.0.100;#DNS服务器地址(多个地址用","隔开)option domain-name-servers 202.206.192.33, 223.5.5.5;#为所分配的域分配域名option domain-name "mylab.com";#为所分配的主机分发子网掩码option subnet-mask 255.255.255.0;#分发默认网关option routers 10.0.0.1;#分发广播地址option broadcast-address 10.0.0.255;#默认租期时间(秒)default-lease-time 600;#最大租期时间(秒)max-lease-time 7200;}

Iv. Start-up service

1. Start the DHCP service

   sudo service isc-dhcp-server restart

2. To see if the DHCP service starts properly

   sudo netstat -uap

   See if the Service list has DHCPD services
   

V. Verification Services

Restart the NIC on the WIN10 client to get the IP address

Ubuntu-16.04 Building DHCP Service