Iptables 防火墙转

*nat
:PREROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A POSTROUTING -o eth+ -j MASQUERADE
-A PREROUTING -i eth+ -p tcp --dport 80 -j DNAT --to-destination 192.168.244.136:80
-A PREROUTING -i eth+ -p tcp --dport 3000 -j DNAT --to-destination 192.168.244.136:3000
COMMIT
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -i eth+ -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
#-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
-A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
-A FORWARD -p icmp -j ACCEPT
-A FORWARD -i lo -j ACCEPT
-A FORWARD -i eth+ -j ACCEPT
-A FORWARD -o eth+ -j ACCEPT
-A FORWARD -i eth+ -m state --state NEW -m tcp -p tcp -d 192.168.244.136 --dport 80 -j ACCEPT
-A FORWARD -i eth+ -m state --state NEW -m tcp -p tcp -d 192.168.244.136 --dport 3000 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT

然后开启转发

另外一个方法，亲测可以使用

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

添加转发端口

iptables -t nat -A PREROUTING -d 192.168.244.139 -p tcp --dport 80 -j DNAT --to-destination 192.168.244.136:80
iptables -t nat -A PREROUTING -d 192.168.244.139 -p tcp --dport 30 -j DNAT --to-destination 192.168.244.136:2000