#!/bin/sh
insmod ip_tables
insmod iptable_filter
insmod ip_conntrack
insmod ip_conntrack_ftp
insmod ip_nat_ftp
insmod ipt_state
insmod ipt_limit
iptables -t filter -F user_chain
iptables -t filter -X user_chain
iptables -t filter -N user_chain
iptables -t filter -F FORWARD
#iptables -t filter -A FORWARD -p tcp -d 192.168.3.80 -j user_chain
iptables -t filter -A user_chain -j DROP
iptables -t nat -F POSTROUTING
iptables -t nat -A POSTROUTING -s 192.168.1.2 -o eth0 -j SNAT --to 192.168.3.80
iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to 192.168.3.68
iptables -t nat -F PREROUTING
iptables -A PREROUTING -t nat -d 192.168.3.80 -j DNAT --to 192.168.1.2
##/proc/sys/net/ipv4/ip_forward
##파일을 수정 0 --> 1 로 수정