IPTables Block All Connections But Able to Backup vServer

#!/bin/bash

Flushing Old Rules
IPTABLES -F
IPTABLES -X
IPTABLES -t nat -F
IPTABLES -t nat -X

Creating General Policy
IPTABLES -P INPUT DROP
IPTABLES -P OUTPUT DROP
IPTABLES -P FORWARD DROP

Allowing SSH
IPTABLES -A OUTPUT -p tcp –dport 22 -m state –state ESTABLISHED,RELATED  -j ACCEPT
IPTABLES -A INPUT -p tcp –sport 22 -j ACCEPT