| -P INPUT DROP | |
| -P FORWARD DROP | |
| -P OUTPUT DROP | |
| -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT | |
| -A INPUT -i lo -j ACCEPT | |
| -A INPUT -p icmp -j ACCEPT | |
| -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT | |
| -A OUTPUT -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT | |
| -A OUTPUT -o lo -j ACCEPT |