Added iptables helper script

test/scripts/iptables.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+# Delete all existing rules
+/sbin/iptables -F
+/sbin/iptables -X
+
+# Set default chain policies
+/sbin/iptables -P INPUT DROP
+/sbin/iptables -P FORWARD DROP
+/sbin/iptables -P OUTPUT ACCEPT
+
+# Allow unlimited traffic on loopback
+/sbin/iptables -A INPUT -i lo -j ACCEPT
+/sbin/iptables -A OUTPUT -o lo -j ACCEPT
+
+# Allow incoming SSH
+/sbin/iptables -A INPUT -i eth0 -p tcp --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT
+/sbin/iptables -A OUTPUT -o eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT
+
+# Allow established connections
+/sbin/iptables -A INPUT -i eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT
+