# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description     "Set iptables IPv6 policies and add rules"
author          "chromium-os-dev@chromium.org"

start on starting network-services
task

script
{
  ip6tables -P INPUT DROP -w
  ip6tables -P FORWARD DROP -w
  ip6tables -P OUTPUT DROP -w

  # Accept everything on the loopback
  ip6tables -I INPUT -i lo -j ACCEPT -w
  ip6tables -I OUTPUT -o lo -j ACCEPT -w

  # Accept return traffic inbound
  ip6tables -I INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -w

  # Accept icmp echo (NB: icmp echo ratelimiting is done by the kernel)
  ip6tables -A INPUT -p ipv6-icmp -j ACCEPT -w

  # Allow all outbound ICMPv6 traffic.  This is important for things like
  # neighbor discovery and address negotiation.
  ip6tables -A OUTPUT -p ipv6-icmp -j ACCEPT -w

  # Accept new and return traffic outbound
  ip6tables -I OUTPUT -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT -w

  # Accept inbound mDNS traffic
  ip6tables -A INPUT -p udp --destination FF02::FB --dport 5353 -j ACCEPT -w
} 2>&1 | logger --priority daemon.info -t ${UPSTART_JOB}
end script