I made some changes so it works now ..
thanks anyway !
(The changes if anyone cares)
#! /bin/bash
iptables -F
iptables -X
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 -A OUTPUT -m state --state NEW -j ACCEPT
iptables -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 20:21 -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 22:22 -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 80:80 -j ACCEPT
iptables -A INPUT -s 192.168.0.0/24 -d 192.168.0.0/24 -i eth0 -p tcp --dport 137:139 -j ACCEPT
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