Script verification

[Mohamed Nassih <nassih50@yahoo.com>]

I'am a new be..
 
I want to configure a firewall between my local network and internet, I want to permet 123.45.67.2 to see a http web server.
I write this script, please correct to me if there is some error. is this enough?
 
Thanks
 
echo 1 > /proc/sys/net /ipv4/ip_forward
IPTABLES -F INPUT 
IPTABLES -F OUTPUT 
IPTABLES -F FORWARD
IPTABLES -P INPUT DROP 
IPTABLES -P OUTPUT DROP 
IPTABLES -P FORWARD DROP 
Iptables –A INPUT  -i lo –j ACCEPT
Iptables –A OUTPUT  -o lo –j ACCEPT

iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -o eth0 -j MASQUERADE

iptables -A FORWARD -i eth1 –o eth0 -p tcp -d 123.45.67.2 --destination-port 80 

–m state --state NEW,ESTABLISHED  -j ACCEPT

 iptables -A FORWARD –p tcp -i eth0 –o eth0 –-source-port 80 –m state --state ESTABLISHED -j ACCEPT 



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