#!/bin/sh -
############
# Setup system for IPv6 firewall service.

setup_local () {
	############
	# Only in rare cases do you want to change these rules
	#
	${fw6cmd} add 100 pass all from any to any via lo0
	${fw6cmd} add 200 deny all from any to ::1
	${fw6cmd} add 300 deny all from ::1 to any
	#
	# ND
	#
	# DAD
	${fw6cmd} add pass ipv6-icmp from :: to ff02::/16
	# RS, RA, NS, NA, redirect...
	${fw6cmd} add pass ipv6-icmp from fe80::/10 to fe80::/10
	${fw6cmd} add pass ipv6-icmp from fe80::/10 to ff02::/16
}


fw6cmd="/sbin/ip6fw"

############
# Flush out the list before we begin.
#
${fw6cmd} -f flush

	############
	# This is a prototype setup for a simple firewall.  Configure this
	# machine as a DNS and NTP server, and point all the machines
	# on the inside at this machine for those services.
	############

	# set these to your outside interface network and prefixlen and ip
	oif="ed0"
	onet="2001:db8:2:1::"
	oprefixlen="64"
	oip="2001:db8:2:1::1"

	# set these to your inside interface network and prefixlen and ip
	iif="ed1"
	inet="2001:db8:2:2::"
	iprefixlen="64"
	iip="2001:db8:2:2::1"

	setup_local

	# Stop spoofing
	${fw6cmd} add deny all from ${inet}/${iprefixlen} to any in via ${oif}
	${fw6cmd} add deny all from ${onet}/${oprefixlen} to any in via ${iif}

	# Stop unique local unicast address on the outside interface
	${fw6cmd} add deny all from fc00::/7 to any via ${oif}
	${fw6cmd} add deny all from any to fc00::/7 via ${oif}

	# Stop site-local on the outside interface
	${fw6cmd} add deny all from fec0::/10 to any via ${oif}
	${fw6cmd} add deny all from any to fec0::/10 via ${oif}

	# Disallow "internal" addresses to appear on the wire.
	${fw6cmd} add deny all from ::ffff:0.0.0.0/96 to any via ${oif}
	${fw6cmd} add deny all from any to ::ffff:0.0.0.0/96 via ${oif}

	# Disallow packets to malicious IPv4 compatible prefix.
	${fw6cmd} add deny all from ::224.0.0.0/100 to any via ${oif}
	${fw6cmd} add deny all from any to ::224.0.0.0/100 via ${oif}
	${fw6cmd} add deny all from ::127.0.0.0/104 to any via ${oif}
	${fw6cmd} add deny all from any to ::127.0.0.0/104 via ${oif}
	${fw6cmd} add deny all from ::0.0.0.0/104 to any via ${oif}
	${fw6cmd} add deny all from any to ::0.0.0.0/104 via ${oif}
	${fw6cmd} add deny all from ::255.0.0.0/104 to any via ${oif}
	${fw6cmd} add deny all from any to ::255.0.0.0/104 via ${oif}

	${fw6cmd} add deny all from ::0.0.0.0/96 to any via ${oif}
	${fw6cmd} add deny all from any to ::0.0.0.0/96 via ${oif}

	# Disallow packets to malicious 6to4 prefix.
	${fw6cmd} add deny all from 2002:e000::/20 to any via ${oif}
	${fw6cmd} add deny all from any to 2002:e000::/20 via ${oif}
	${fw6cmd} add deny all from 2002:7f00::/24 to any via ${oif}
	${fw6cmd} add deny all from any to 2002:7f00::/24 via ${oif}
	${fw6cmd} add deny all from 2002:0000::/24 to any via ${oif}
	${fw6cmd} add deny all from any to 2002:0000::/24 via ${oif}
	${fw6cmd} add deny all from 2002:ff00::/24 to any via ${oif}
	${fw6cmd} add deny all from any to 2002:ff00::/24 via ${oif}

	${fw6cmd} add deny all from 2002:0a00::/24 to any via ${oif}
	${fw6cmd} add deny all from any to 2002:0a00::/24 via ${oif}
	${fw6cmd} add deny all from 2002:ac10::/28 to any via ${oif}
	${fw6cmd} add deny all from any to 2002:ac10::/28 via ${oif}
	${fw6cmd} add deny all from 2002:c0a8::/32 to any via ${oif}
	${fw6cmd} add deny all from any to 2002:c0a8::/32 via ${oif}

	${fw6cmd} add deny all from ff05::/16 to any via ${oif}
	${fw6cmd} add deny all from any to ff05::/16 via ${oif}

	# Allow TCP through if setup succeeded
	${fw6cmd} add pass tcp from any to any established

	# Allow IP fragments to pass through
	${fw6cmd} add pass all from any to any frag

	# Allow setup of incoming email
	${fw6cmd} add pass tcp from any to ${oip} 25 setup

	# Allow access to our DNS
	${fw6cmd} add pass tcp from any to ${oip} 53 setup
	${fw6cmd} add pass udp from any to ${oip} 53
	${fw6cmd} add pass udp from ${oip} 53 to any

	# Allow access to our WWW
	${fw6cmd} add pass tcp from any to ${oip} 80 setup

	# Reject&Log all setup of incoming connections from the outside
	${fw6cmd} add deny log tcp from any to any in via ${oif} setup

	# Allow setup of any other TCP connection
	${fw6cmd} add pass tcp from any to any setup

	# Allow DNS queries out in the world
	${fw6cmd} add pass udp from any 53 to ${oip}
	${fw6cmd} add pass udp from ${oip} to any 53

	# Allow NTP queries out in the world
	${fw6cmd} add pass udp from any 123 to ${oip}
	${fw6cmd} add pass udp from ${oip} to any 123

	# Allow RIPng
	#${fw6cmd} add pass udp from fe80::/10 521 to ff02::9 521
	#${fw6cmd} add pass udp from fe80::/10 521 to fe80::/10 521

	# Allow ICMPv6 destination unreach
	${fw6cmd} add pass ipv6-icmp from any to any icmptypes 1

	# Allow NS/NA/toobig (don't filter it out)
	${fw6cmd} add pass ipv6-icmp from any to any icmptypes 2,135,136

	# Everything else is denied by default, unless the
	# IPV6FIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
	# config file.