#!/bin/bash IPT=iptables $IPT -F $IPT -P INPUT DROP $IPT -P FORWARD DROP $IPT -P OUTPUT ACCEPT # Allow loopback $IPT -A INPUT -i lo -j ACCEPT $IPT -A OUTPUT -o lo -j ACCEPT # Allow three-way handshake $IPT -A INPUT -m state --state NEW -j ACCEPT $IPT -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT $IPT -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow input ssh $IPT -A INPUT -p tcp --dport 22 -j ACCEPT # Allow smb over Port 445 \$IPT -A INPUT -p tcp --dport 445 -j ACCEPT