iptables 作nat 和1对1端口映射

zhwqy

看资料作的 ,不知道端口影射能否成功
各位大大给点意见..看看什么地方需要修改 a.b.c.d 为外网IP
echo "Enable ip forwarding"
echo 1 >;/proc/sys/net/ipv4/ip_forward
echo "starting iptables rules"
modprobe iptable_filler
modprobe ip_tables
modprobe iptable_nat
modprobe ip_nat_ftp
modprobe ip_conntrack_ftp
iptables -F INPUT
iptables -F FORWARD
iptables -F POSTROUTING -t nat
iptables -F PREROUTING -t nat
iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT ACCEPT
iptables -A INPUT -i lo -j ACCEPT
iptables -A INPUT -i eth1 -j ACCEPT
iptables -A INPUT -i eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A FORWARD -s 192.168.0.0/24 -j ACCEPT
iptables -A FORWARD -i eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -t nat -A POSTROUTING -o eth0 -s 192.168.0.0/24 -j SNAT --to-source a.b.c.d
iptables -A FORWARD -o eth0 -d 192.168.0.3 -p tcp --dport 80 -j ACCEPT
iptables -A FORWARD -i eth0 -s 192.168.0.3 -p tcp --sport 80 -m --state ESTABLISHED -j ACCEPT
iptables -t nat PREROUTING -p tcp -d a.b.c.d --dport 80 -j DNAT --to-destination 192.168.0.3:80
/etc/rc.d/init.d/iptables restart
iptables -L