iptable rules

# Flush all rules
iptables -F
iptables -X

# Allow unlimited outgoing traffic to all networks and protocols (for now)
iptables -P OUTPUT ACCEPT

# Allow unlimited incoming traffic on private network for all protocols
iptables -A INPUT -i lo -j ACCEPT

# Allow incoming traffic from established/related connections on public network for all protocols
iptables -A INPUT -i eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT

# Allow new (incoming) SSH on public network
iptables -A INPUT -i eth0 -p tcp --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT

# Allow new (incoming) HTTP/HTTPS on public network
# HTTP
iptables -A INPUT -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
# HTTPS
iptables -A INPUT -i eth0 -p tcp --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT

# Drop everything elese
iptables -P INPUT DROP
iptables -P FORWARD DROP