1 -P INPUT DROP 2 -P FORWARD DROP 3 -P OUTPUT DROP 4 -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT 5 -A INPUT -i lo -j ACCEPT 6 -A INPUT -p icmp -j ACCEPT 7 -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT 8 -A INPUT -d 224.0.0.251/32 -p udp -m udp --dport 5353 -j ACCEPT 9 -A OUTPUT -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT 10 -A OUTPUT -o lo -j ACCEPT 11
