Linux 中搭建DHCP服务器实例

        下面的流程实例中，DHCP服务分配的IP地址段为192.168.1.128~192.168.1.133
       
        ㈠ 首先查看dhcp服务是否安装[root@localhost ~]# rpm -qa | grep dhcp
dhcp-3.0.5-31.el5
dhcpv6-client-1.0.10-20.el5
sblim-cmpi-dhcp-devel-1.0-49.el5
sblim-cmpi-dhcp-1.0-49.el5
        ㈡ 编辑/etc/dhcpd.conf[root@localhost ~]# cat /etc/dhcpd.conf
#
# DHCP Server Configuration file.
# see /usr/share/doc/dhcp*/dhcpd.conf.sample

[root@localhost ~]# cp /usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample /etc/dhcpd.conf
cp：是否覆盖“/etc/dhcpd.conf”? yes

[root@localhost ~]# cat /etc/dhcpd.conf

ddns-update-style interim; #DDNS更新方式，这里的设定值有3种：ad-hoc、interim和none
ignore client-updates; #忽略客户端更新

subnet 192.168.1.0 netmask 255.255.255.0 {

option routers 192.168.1.1; #网关地址设定
option subnet-mask 255.255.255.0; #子网掩码设定
option domain-name "localdomain"; #主机域名
option domain-name-servers 192.168.1.110; #设定DNS服务器地址
range dynamic-bootp 192.168.1.128 192.168.1.136; #动态分配的IP地址范围
}
        ㈢ 对网卡绑定DHCP服务[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=yes
        ㈣ 重新启动DHCP服务
       
           DHCP服务使用UDP的67端口，但Iptables不能过滤DHCP服务使用的原始套接字（Raw Socket）
           所以在服务设定好之后，无须再设定Iptables
           service dhcpd start
           service network restart
           如果在虚拟机内搭建，记得把网卡模式改成NAT
        ㈤ 验证[root@localhost ~]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:F9:B7:FA
inet addr:192.168.227.131 Bcast:192.168.227.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fef9:b7fa/64 Scope:Link