【基于CentOS 7 的DHCP服务器管理】

cd /etc/yum.repo s.d
mk dir backup
m v Ce ntOS-* backup
vim local.repo
[local]
name=local
base url=file:///mnt
enable d=1
gpg check=0
m ount /dev/sr0 /mnt

2.关闭 防火墙及SELinux

2.1 命令

systemctl stop firewalld && systemctl d isa ble firewalld

2.2 查看SElinux 状态

get e n force

2.3 设置宽容模式

set e n force 0

2.4 关闭SElinux

vi m /etc/selinux/config
SELINUX=e nf o r cin g 改为 SELINUX=disabled

注：永久关闭，重启才能生效

3.配置 静态IP

3.1 关闭网络图形化 工具

systemctl stop NetworkMana ger ； systemctl d isa ble NetworkMana ger

3.2 具体配置

cd /etc/sysconfig/network–script s/
vi m ifcfg–ens33
TYPE=Ether net
BOOTPROTO=static
NAME=ens33
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.100.254
PREFIX=24
systemctl restart network

4.安装DHCP软件包

yum install –y dhcp

五、配置

1.配置文件 存储 路径

/etc/dhcp

2.默认 配置文件 副本 路径

/usr/share/doc/dhcp-4.2.5/

3.数据文件存储路径

/var/lib/dhcpd

4.核心 配置文件

4.1 打开配置文件

/etc/dhcp/dhcpd.conf

4.2 找到 演示 文件地址将其拷贝到本地址并覆盖

cp /usr/share/doc/dhcp-4.2.5/dhc pd.conf.example /etc/dhc p/dhc pd.conf

4.3 打开 现有的dhc pd.conf

4.4 配置项

4.4.1 su b net

配置DHCP分配的地址池

subnet 192.168.100.0 net mask 255.255.255.0 {
range 192.168.100.2 192.168.100.253;
option domain–name–servers 8.8.8.8;
option domain–name “internal.example.org“;
option routers 192.168.100.1;
option br oadcast–address 192.168.100.255;
default-lease–time 600;
max-lease–time 7200;
}