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#!/bin/sh

IPT="/sbin/iptables"

/bin/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

$IPT -F

$IPT -t nat -F

$IPT -X

$IPT -t nat -X

$IPT -Z

$IPT -t nat -Z

#DNAT ���˿�ת��

$IPT -t nat -A PREROUTING -d 192.168.0.174 -p tcp --dport 28 -j DNAT --to-destination 192.168.9.101:22

$IPT -t nat -A POSTROUTING -p tcp -d 192.168.9.101 --dport 22 -j SNAT --to-source 192.168.0.174

#SNAT ������ת��

#$IPT -t nat -A POSTROUTING  -s 192.168.0.0/16  -j SNAT --to-source 210.72.24.15


��ע��

������Ҫ����NAT��Ҫ��Linux�ϴ��ں˶�IP����ת��֧�֣�linux�ϱ༭ /etc/sysctl.conf�ļ�:

net.ipv4.ip_forward = 1

Ȼ��ִ��

sysctl -p


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