## Accepted INPUT connections ##

# Related and established traffic, regardless of interface
iptables -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT

# ssh connections
iptables -A INPUT -p tcp --dport 922 -j ACCEPT

# pings
iptables -A INPUT -p icmp --icmp-type 8 -m conntrack --ctstate NEW -j ACCEPT

# All traffic on the loopback interface
iptables -A INPUT -i lo -j ACCEPT

## Policy settings ##

iptables -P FORWARD DROP
iptables -P OUTPUT ACCEPT
iptables -P INPUT DROP

