在Ubuntu Server 10.10上简单配置iptables-centos7 iptables配置

操作基于ubuntu server10.10 上进行安装配置.进行配置iptables.ip转换.mac过滤功能.

1.建iptables

root@ptubuntufirewall:/# vi /etc/init.d/iptables


#fLUSH THE FILTER,NAT,Mangle chain!
/sbin/iptables -F -t filter
/sbin/iptables -F -t nat
/sbin/iptables -F -t mangle
#Flush the user's chain
/sbin/iptables -t filter -X
/sbin/iptables -t nat -X
/sbin/iptables -t mangle -X
#Set default policies to DROP
/sbin/iptables -P INPUT ACCEPT
/sbin/iptables -P OUTPUT ACCEPT
/sbin/iptables -P FORWARD ACCEPT
#LAN NAT
/sbin/iptables -A POSTROUTING -t nat -s 192.168.0.0/255.255.255.0 -o eth1 -j MASQUERADE
#/sbin/iptables -A POSTROUTING -t nat -s 192.168.0.0/255.255.255.0 -o eth0 -j MASQUERADE
if [ -f /etc/access_mac.conf ]
then
for i in `cat /etc/access_mac.conf | grep "^[^#]" | tr -s "[12]" | cut -c1-17` ; do
/sbin/iptables -A FORWARD -m mac --mac-source $i -i eth0 -j ACCEPT
done
fi
/sbin/iptables -A FORWARD -i eth0 -j DROP

#VNC View Ptubuntu 这下面两条指:访问外网ip可以转换到内网ip:端口


/sbin/iptables -A PREROUTING -t nat -p tcp -m tcp -i eth1 --dport 5888 -j DNAT --to-destination 192.168.0.110:5888
/sbin/iptables -A PREROUTING -t nat -p tcp -m tcp -i eth1 --dport 5988 -j DNAT --to-destination 192.168.0.110:5988

2.设置要过虑的网卡:access_mac.conf

root@ptubuntufirewall:/#vi /etc/access_mac.conf

#MAC address Employee Name OR SERVER Name

#Server Netcard Mac Address

00:e0:4c:39:00:00 System Server eth0

00:e0:4c:39:00:00 System Server eth1

00:e0:4c:39:00:00 ptubuntu Server eth0 在这里添加你需要上网的网卡mac地址

3.sysctl设置参数．能用sysctl来设置或重新设置连网功能，如IP转发、IP碎片去除及源路由检查等

root@ptubuntufirewall:/# cat /etc/sysctl.conf

net.ipv4.ip_forward=1 #把０改为１就可以了

４.设置让它自动启动iptables.

root@ptubuntufirewall:/# update-rc.d iptables defaults 99

显示如下表示成功.

update-rc.d: warning: /etc/init.d/iptables missing LSB information

update-rc.d: see <http://wiki.debian.org/LSBInitScripts>

Adding system startup for /etc/init.d/iptables …

/etc/rc0.d/K99iptables -> ../init.d/iptables

/etc/rc1.d/K99iptables -> ../init.d/iptables

/etc/rc6.d/K99iptables -> ../init.d/iptables

/etc/rc2.d/S99iptables -> ../init.d/iptables

/etc/rc3.d/S99iptables -> ../init.d/iptables

/etc/rc4.d/S99iptables -> ../init.d/iptables

/etc/rc5.d/S99iptables -> ../init.d/iptables

5.还需要安装dhcp服务器.

root@ptubuntufirewall:/#aptitude install dhcp3-server

root@ptubuntufirewall:/#vi /etc/dhcp3/dhcpd.conf

文档内容:

option domain-name “ptubuntufirewall.com”;

option domain-name-servers 8.8.4.4, 8.8.8.8;

default-lease-time 18000;

max-lease-time 36000;

subnet 192.168.0.0 netmask 255.255.255.0 {

range dynamic-bootp 192.168.0.100 192.168.0.255;

option subnet-mask 255.255.255.0;

option broadcast-address 192.168.0.255;

option routers 192.168.0.252;

option time-offset -18000;

}

完后需要重启计算机才可以使用.

6.测试:ping

root@ptubuntufirewall:/# ping 192.168.0.252

root@ptubuntufirewall:/#ping 8.8.8.8外网IP都可以正常.

7.设置客户端.

现在就可以自动获取ip地址.如果你需要手动设置IP那么你的默认网关就是你路由的IP地址.192.168.0.252

via{http://www.ptubuntu.com/2011/01/4076.html}

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