Linux系统——dhcp服务

一、dhcp简介

dhcp，应用层协议
作用: 为主机动态分配IP地址、掩码、网关、DNS服务器地址

二、配置dhcp服务

1、关闭selinux、防火墙

[root@node01 ~]# getenforce 
Disabled
[root@node01 ~]# systemctl status firewalld
● firewalld.service
   Loaded: masked (/dev/null; bad)
   Active: inactive (dead)

2、安装dhcp软件

[root@martin-host ~]# yum install dhcp 

[root@martin-host ~]# rpm -q dhcp
dhcp-4.2.5-83.el7.centos.2.x86_64

3、复制dhcp的配置文件

[root@martin-host ~]# cp /usr/share/doc/dhcp-4.2.5/dhcpd.conf.example  /etc/dhcp/dhcpd.conf 
cp：是否覆盖"/etc/dhcp/dhcpd.conf"？ yes

4、编辑dhcp配置文件

[root@martin-host ~]# vim /etc/dhcp/dhcpd.conf 

subnet 192.168.140.0 netmask 255.255.255.0 {
  range 192.168.140.200 192.168.140.250;
  option routers 192.168.140.2;
  option domain-name-servers 114.114.114.114,223.5.5.5;
}

5、启动dhcp服务

[root@martin-host ~]# systemctl start dhcpd 
[root@martin-host ~]# systemctl enable dhcpd
Created symlink from /etc/systemd/system/multi-user.target.wants/dhcpd.service to /usr/lib/systemd/system/dhcpd.service.
[root@martin-host ~]# 

6、测试dhcp服务是否正常

• 关闭虚拟网络自带dhcp