linux dhcp服务

1 dhcp服务

由服务器控制一段IP地址范围，客户机登录服务器时就可以自动获得服务器分配的IP地址和子网掩码。

/etc/dhcpd.conf              主配置文件

ddns-update-styleinterim;          /*dhcp支持的dns动态更新方式*/
ignore client-updates;                    /*忽略客户端DNS动态更新*/

option domain-name "benet.com";         /*域名*/
 option domain-name-servers 192.168.1.1,202.103.24.68; /*dns IP*/
 option broadcast-address 192.168.1.255;/*广播地址*/
 default-lease-time86400;              /*租期1天，秒数*/
 max-lease-time172800;                 /*最长租期2天*/

subnet 192.168.1.0 netmask 255.255.255.0 {/*作用域网段*/
 range 192.168.1.11 192.168.1.100;      /*ip地址段范围*/
 option routers192.168.1.1;            /*网关地址*/
 option subnet-mask 255.255.255.0;       /*子网掩码*/
 
 /*绑定pc1主机ip地址配置*/
host pc1{              
  hardware ethernet 00:a0:cc:cf:9C:14; /*绑定机MAC地址*/
  fixed-address192.168.1.20;         /*最长租期2天*/
 }

}

/var/lib/dhcpd/dhcp.leases  服务器租约文件

server dhcpd start

dhcp中继

/etc/sysconfig/dhcrelay      主配置文件

# Command line optionshere
INTERFACES="eth1 eth2"
DHCPSERVERS="192.168.1.1"

vim /etc/sysct1.conf

net.ipv4.ip_forward=1

sysct1 -p