*filter table - srv rules

*filter

:INPUT ACCEPT [0:0]

:FORWARD ACCEPT [0:0]

:OUTPUT ACCEPT [0:0]

# basic global accept - ICMP, loopback, traceroute, established

-A INPUT -s 127.0.0.0/8 -d 127.0.0.0/8 -i lo -j ACCEPT

-A INPUT -p icmp -j ACCEPT

-A INPUT -m state --state ESTABLISHED -j ACCEPT

# enable traceroute rejections to get sent out

-A INPUT -p udp -m udp --dport 33434:33523 -j REJECT --reject-with icmp-port-unreachable

# DNS, SSH, DHCP client requests - accept from LAN

-A INPUT -i p1p1 -p tcp --dport 53 -j ACCEPT

-A INPUT -i p1p1 -p udp --dport 53 -j ACCEPT

-A INPUT -i p1p1 -p tcp --dport 22 -j ACCEPT

-A INPUT -i p1p1 -p udp --dport 67:68 -j ACCEPT

# drop all other inbound traffic

-A INPUT -j DROP