1)网卡设置
eth0作为外网口
192.168.1.201 255.255.255.0 192.168.1.1
eth1作为内网口
192.168.0.1 255.255.255.0
2)开启ip转发#echo 1 > /proc/sys/net/ipv4/ip_forward永久开启方法：#vim /etc/sysctl.confnet.ipv4.ip_forward=1３）使用itables开启nat（ MASQUERADE）#iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
４）使用iptables允许数据流(这样是不安全的，先做测试)#iptables -t filter -A FORWARD -i eth0 -o eth1 -j ACCEPT#iptables -t filter -A FORWARD -o eth1 -i eth0 -j ACCEPT
５）安装DHCP服务
#rpm -ivh dhcp-3.0.5-23.el5.i386.rpm #rpm -ivh dhcp-devel-3.0.5-23.el5.i386.rpm
[root@guojianjun ~]# cp /usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample /etc/dhcpd.conf 首先从/usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample 目录下把配置文件复到 /etc/dhcpd.conf把原来 dhcpd.conf文件复盖．
#vi /dhcpd.conf
修改下面几行，因eth1占用了192.168.0.1, 因而dhcp池从192.168.0.2开始．
range dynamic-bootp 192.168.0.2 192.168.0.254; default-lease-time 21600; max-lease-time 43200;
＃service dhcpd restart
转载于:https://www.cnblogs.com/bevis/archive/2013/06/15/3138026.html
