#!/bin/sh # Name: nat.sh # Author: Bixuan # Date: 2003/04/04 echo "Your user the iptables

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centos下设置服务器网络net共享

#!/bin/sh  
# Name: nat.sh  
# Author: Bixuan  
# Date: 2003/04/04  

echo "Your user the iptables firewall.";  
ETH="eno33557248"  #有外网IP的网卡
SRC="192.168.1.0/24" # 内网地址段  


case $1 in  
   start)  
       echo 1 > /proc/sys/net/ipv4/ip_forward  
       /sbin/modprobe ip_tables  
       /sbin/modprobe iptable_filter  
        /sbin/modprobe iptable_nat  
        /sbin/modprobe ip_conntrack  
        /sbin/modprobe ip_conntrack_ftp  
        /sbin/modprobe ip_nat_ftp  
        /sbin/iptables -F INPUT  
        /sbin/iptables -F FORWARD  
        /sbin/iptables -F POSTROUTING -t nat  
        /sbin/iptables -P FORWARD DROP  
        /sbin/iptables -t nat -A POSTROUTING -o $ETH -s $SRC -j MASQUERADE  
        /sbin/iptables -A FORWARD -i $ETH -m state --state ESTABLISHED,RELATED -j ACCEPT  
        /sbin/iptables -A FORWARD -s $SRC -j ACCEPT  
        echo "Docker restarting ......"
        systemctl restart docker.service #add
        docker start nginx #add
        echo "Nat is strating ...... [ OK ]"  
        ;;  
   stop)  
       echo 0 > /proc/sys/net/ipv4/ip_forward  
       ;;  
   *)  
       echo $"Usage: $0 {start|stop}";  
esac