two nic's port forwarding in iptables

os : centos 6.5
iptables : 1.4.7

forward dest port : 9090
forward dest ip : 192.168.0.100
my machine lan : eth0 : 192.168.0.200
my machine wan : eth1 : 100.100.100.100


[ my machine work ]

vi /etc/sysctl.conf
net.ipv4.ip_forward = 1

sysctl -p /etc/sysctl.conf

cat /proc/sys/net/ipv4/ip_forward

5222, 9090, 8766

iptables -A PREROUTING -t nat -i eth1 -p tcp --dport 9090 -j DNAT --to 192.168.0.100:9090
iptables -A FORWARD -p tcp -d 192.168.0.100 --dport 9090 -j ACCEPT

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

/etc/init.d/iptables save

[ forword rule delete ]

iptables -L FORWARD --line-numbers

Chain FORWARD (policy ACCEPT)
num  target     prot opt source               destination
1    ACCEPT     tcp  --  anywhere             192.168.0.100       tcp dpt:xmpp-client
2    ACCEPT     tcp  --  anywhere             192.168.0.100       tcp dpt:websm

iptables -D FORWARD 2

## iptables all delete
iptables -F