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authorEmmanuel Vadot <manu@FreeBSD.org>2019-05-22 07:38:54 +0000
committerEmmanuel Vadot <manu@FreeBSD.org>2019-05-22 07:38:54 +0000
commit5d8c2d4c4fe63356c7bbcdc35615717b085684d4 (patch)
tree39ed7df778a70433873c3c5c68e404e1e3a2c7af /etc
parenta8b94f3d7980ab609a4f6dac11f23eecbdcce892 (diff)
downloadsrc-test2-5d8c2d4c4fe63356c7bbcdc35615717b085684d4.tar.gz
src-test2-5d8c2d4c4fe63356c7bbcdc35615717b085684d4.zip
Notes
Diffstat (limited to 'etc')
-rw-r--r--etc/rc.firewall557
1 files changed, 0 insertions, 557 deletions
diff --git a/etc/rc.firewall b/etc/rc.firewall
deleted file mode 100644
index 8389d76c5cc6..000000000000
--- a/etc/rc.firewall
+++ /dev/null
@@ -1,557 +0,0 @@
-#!/bin/sh -
-# Copyright (c) 1996 Poul-Henning Kamp
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-# notice, this list of conditions and the following disclaimer in the
-# documentation and/or other materials provided with the distribution.
-#
-# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-# $FreeBSD$
-#
-
-#
-# Setup system for ipfw(4) firewall service.
-#
-
-# Suck in the configuration variables.
-if [ -z "${source_rc_confs_defined}" ]; then
- if [ -r /etc/defaults/rc.conf ]; then
- . /etc/defaults/rc.conf
- source_rc_confs
- elif [ -r /etc/rc.conf ]; then
- . /etc/rc.conf
- fi
-fi
-
-############
-# Define the firewall type in /etc/rc.conf. Valid values are:
-# open - will allow anyone in
-# client - will try to protect just this machine
-# simple - will try to protect a whole network
-# closed - totally disables IP services except via lo0 interface
-# workstation - will try to protect just this machine using stateful
-# firewalling. See below for rc.conf variables used
-# UNKNOWN - disables the loading of firewall rules.
-# filename - will load the rules in the given filename (full path required)
-#
-# For ``client'' and ``simple'' the entries below should be customized
-# appropriately.
-
-############
-#
-# If you don't know enough about packet filtering, we suggest that you
-# take time to read this book:
-#
-# Building Internet Firewalls, 2nd Edition
-# Brent Chapman and Elizabeth Zwicky
-#
-# O'Reilly & Associates, Inc
-# ISBN 1-56592-871-7
-# http://www.ora.com/
-# http://www.oreilly.com/catalog/fire2/
-#
-# For a more advanced treatment of Internet Security read:
-#
-# Firewalls and Internet Security: Repelling the Wily Hacker, 2nd Edition
-# William R. Cheswick, Steven M. Bellowin, Aviel D. Rubin
-#
-# Addison-Wesley / Prentice Hall
-# ISBN 0-201-63466-X
-# http://www.pearsonhighered.com/
-# http://www.pearsonhighered.com/educator/academic/product/0,3110,020163466X,00.html
-#
-
-setup_loopback() {
- ############
- # Only in rare cases do you want to change these rules
- #
- ${fwcmd} add 100 pass all from any to any via lo0
- ${fwcmd} add 200 deny all from any to 127.0.0.0/8
- ${fwcmd} add 300 deny ip from 127.0.0.0/8 to any
- if [ $ipv6_available -eq 0 ]; then
- ${fwcmd} add 400 deny all from any to ::1
- ${fwcmd} add 500 deny all from ::1 to any
- fi
-}
-
-setup_ipv6_mandatory() {
- [ $ipv6_available -eq 0 ] || return 0
-
- ############
- # Only in rare cases do you want to change these rules
- #
- # ND
- #
- # DAD
- ${fwcmd} add pass ipv6-icmp from :: to ff02::/16
- # RS, RA, NS, NA, redirect...
- ${fwcmd} add pass ipv6-icmp from fe80::/10 to fe80::/10
- ${fwcmd} add pass ipv6-icmp from fe80::/10 to ff02::/16
-
- # Allow ICMPv6 destination unreachable
- ${fwcmd} add pass ipv6-icmp from any to any icmp6types 1
-
- # Allow NS/NA/toobig (don't filter it out)
- ${fwcmd} add pass ipv6-icmp from any to any icmp6types 2,135,136
-}
-
-. /etc/rc.subr
-. /etc/network.subr
-
-if [ -n "${1}" ]; then
- firewall_type="${1}"
-fi
-if [ -z "${firewall_rc_config_load}" ]; then
- load_rc_config ipfw
-else
- for i in ${firewall_rc_config_load}; do
- load_rc_config $i
- done
-fi
-
-afexists inet6
-ipv6_available=$?
-
-############
-# Set quiet mode if requested
-#
-case ${firewall_quiet} in
-[Yy][Ee][Ss])
- fwcmd="/sbin/ipfw -q"
- ;;
-*)
- fwcmd="/sbin/ipfw"
- ;;
-esac
-
-############
-# Flush out the list before we begin.
-#
-${fwcmd} -f flush
-
-setup_loopback
-setup_ipv6_mandatory
-
-############
-# Network Address Translation. All packets are passed to natd(8)
-# before they encounter your remaining rules. The firewall rules
-# will then be run again on each packet after translation by natd
-# starting at the rule number following the divert rule.
-#
-# For ``simple'' firewall type the divert rule should be put to a
-# different place to not interfere with address-checking rules.
-#
-case ${firewall_type} in
-[Oo][Pp][Ee][Nn]|[Cc][Ll][Ii][Ee][Nn][Tt])
- case ${natd_enable} in
- [Yy][Ee][Ss])
- if [ -n "${natd_interface}" ]; then
- ${fwcmd} add 50 divert natd ip4 from any to any via ${natd_interface}
- fi
- ;;
- esac
- case ${firewall_nat_enable} in
- [Yy][Ee][Ss])
- if [ -n "${firewall_nat_interface}" ]; then
- if echo "${firewall_nat_interface}" | \
- grep -q -E '^[0-9]+(\.[0-9]+){0,3}$'; then
- firewall_nat_flags="ip ${firewall_nat_interface} ${firewall_nat_flags}"
- else
- firewall_nat_flags="if ${firewall_nat_interface} ${firewall_nat_flags}"
- fi
- ${fwcmd} nat 123 config log ${firewall_nat_flags}
- ${fwcmd} add 50 nat 123 ip4 from any to any via ${firewall_nat_interface}
- fi
- ;;
- esac
-esac
-
-############
-# If you just configured ipfw in the kernel as a tool to solve network
-# problems or you just want to disallow some particular kinds of traffic
-# then you will want to change the default policy to open. You can also
-# do this as your only action by setting the firewall_type to ``open''.
-#
-# ${fwcmd} add 65000 pass all from any to any
-
-
-# Prototype setups.
-#
-case ${firewall_type} in
-[Oo][Pp][Ee][Nn])
- ${fwcmd} add 65000 pass all from any to any
- ;;
-
-[Cc][Ll][Ii][Ee][Nn][Tt])
- ############
- # This is a prototype setup that will protect your system somewhat
- # against people from outside your own network.
- #
- # Configuration:
- # firewall_client_net: Network address of local IPv4 network.
- # firewall_client_net_ipv6: Network address of local IPv6 network.
- ############
-
- # set this to your local network
- net="$firewall_client_net"
- net6="$firewall_client_net_ipv6"
-
- # Allow limited broadcast traffic from my own net.
- ${fwcmd} add pass all from ${net} to 255.255.255.255
-
- # Allow any traffic to or from my own net.
- ${fwcmd} add pass all from me to ${net}
- ${fwcmd} add pass all from ${net} to me
- if [ -n "$net6" ]; then
- ${fwcmd} add pass all from me to ${net6}
- ${fwcmd} add pass all from ${net6} to me
- fi
-
- if [ -n "$net6" ]; then
- # Allow any link-local multicast traffic
- ${fwcmd} add pass all from fe80::/10 to ff02::/16
- ${fwcmd} add pass all from ${net6} to ff02::/16
- # Allow DHCPv6
- ${fwcmd} add pass udp from fe80::/10 to me 546
- fi
-
- # Allow TCP through if setup succeeded
- ${fwcmd} add pass tcp from any to any established
-
- # Allow IP fragments to pass through
- ${fwcmd} add pass all from any to any frag
-
- # Allow setup of incoming email
- ${fwcmd} add pass tcp from any to me 25 setup
-
- # Allow setup of outgoing TCP connections only
- ${fwcmd} add pass tcp from me to any setup
-
- # Disallow setup of all other TCP connections
- ${fwcmd} add deny tcp from any to any setup
-
- # Allow DNS queries out in the world
- ${fwcmd} add pass udp from me to any 53 keep-state
-
- # Allow NTP queries out in the world
- ${fwcmd} add pass udp from me to any 123 keep-state
-
- # Everything else is denied by default, unless the
- # IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
- # config file.
- ;;
-
-[Ss][Ii][Mm][Pp][Ll][Ee])
- ############
- # This is a prototype setup for a simple firewall. Configure this
- # machine as a DNS and NTP server, and point all the machines
- # on the inside at this machine for those services.
- #
- # Configuration:
- # firewall_simple_iif: Inside IPv4 network interface.
- # firewall_simple_inet: Inside IPv4 network address.
- # firewall_simple_oif: Outside IPv4 network interface.
- # firewall_simple_onet: Outside IPv4 network address.
- # firewall_simple_iif_ipv6: Inside IPv6 network interface.
- # firewall_simple_inet_ipv6: Inside IPv6 network prefix.
- # firewall_simple_oif_ipv6: Outside IPv6 network interface.
- # firewall_simple_onet_ipv6: Outside IPv6 network prefix.
- ############
- BAD_ADDR_TBL=13
-
- # set these to your outside interface network
- oif="$firewall_simple_oif"
- onet="$firewall_simple_onet"
- oif6="${firewall_simple_oif_ipv6:-$firewall_simple_oif}"
- onet6="$firewall_simple_onet_ipv6"
-
- # set these to your inside interface network
- iif="$firewall_simple_iif"
- inet="$firewall_simple_inet"
- iif6="${firewall_simple_iif_ipv6:-$firewall_simple_iif}"
- inet6="$firewall_simple_inet_ipv6"
-
- # Stop spoofing
- ${fwcmd} add deny all from ${inet} to any in via ${oif}
- ${fwcmd} add deny all from ${onet} to any in via ${iif}
- if [ -n "$inet6" ]; then
- ${fwcmd} add deny all from ${inet6} to any in via ${oif6}
- if [ -n "$onet6" ]; then
- ${fwcmd} add deny all from ${onet6} to any in \
- via ${iif6}
- fi
- fi
-
- # Define stuff we should never send out or receive in.
- # Stop RFC1918 nets on the outside interface
- ${fwcmd} table ${BAD_ADDR_TBL} flush
- ${fwcmd} table ${BAD_ADDR_TBL} add 10.0.0.0/8
- ${fwcmd} table ${BAD_ADDR_TBL} add 172.16.0.0/12
- ${fwcmd} table ${BAD_ADDR_TBL} add 192.168.0.0/16
-
- # And stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
- # DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
- # on the outside interface
- ${fwcmd} table ${BAD_ADDR_TBL} add 0.0.0.0/8
- ${fwcmd} table ${BAD_ADDR_TBL} add 169.254.0.0/16
- ${fwcmd} table ${BAD_ADDR_TBL} add 192.0.2.0/24
- ${fwcmd} table ${BAD_ADDR_TBL} add 224.0.0.0/4
- ${fwcmd} table ${BAD_ADDR_TBL} add 240.0.0.0/4
-
- ${fwcmd} add deny all from any to "table($BAD_ADDR_TBL)" via ${oif}
-
- # Network Address Translation. This rule is placed here deliberately
- # so that it does not interfere with the surrounding address-checking
- # rules. If for example one of your internal LAN machines had its IP
- # address set to 192.0.2.1 then an incoming packet for it after being
- # translated by natd(8) would match the `deny' rule above. Similarly
- # an outgoing packet originated from it before being translated would
- # match the `deny' rule below.
- case ${natd_enable} in
- [Yy][Ee][Ss])
- if [ -n "${natd_interface}" ]; then
- ${fwcmd} add divert natd ip4 from any to any via ${natd_interface}
- fi
- ;;
- esac
-
- ${fwcmd} add deny all from "table($BAD_ADDR_TBL)" to any via ${oif}
- if [ -n "$inet6" ]; then
- # Stop unique local unicast address on the outside interface
- ${fwcmd} add deny all from fc00::/7 to any via ${oif6}
- ${fwcmd} add deny all from any to fc00::/7 via ${oif6}
-
- # Stop site-local on the outside interface
- ${fwcmd} add deny all from fec0::/10 to any via ${oif6}
- ${fwcmd} add deny all from any to fec0::/10 via ${oif6}
-
- # Disallow "internal" addresses to appear on the wire.
- ${fwcmd} add deny all from ::ffff:0.0.0.0/96 to any \
- via ${oif6}
- ${fwcmd} add deny all from any to ::ffff:0.0.0.0/96 \
- via ${oif6}
-
- # Disallow packets to malicious IPv4 compatible prefix.
- ${fwcmd} add deny all from ::224.0.0.0/100 to any via ${oif6}
- ${fwcmd} add deny all from any to ::224.0.0.0/100 via ${oif6}
- ${fwcmd} add deny all from ::127.0.0.0/104 to any via ${oif6}
- ${fwcmd} add deny all from any to ::127.0.0.0/104 via ${oif6}
- ${fwcmd} add deny all from ::0.0.0.0/104 to any via ${oif6}
- ${fwcmd} add deny all from any to ::0.0.0.0/104 via ${oif6}
- ${fwcmd} add deny all from ::255.0.0.0/104 to any via ${oif6}
- ${fwcmd} add deny all from any to ::255.0.0.0/104 via ${oif6}
-
- ${fwcmd} add deny all from ::0.0.0.0/96 to any via ${oif6}
- ${fwcmd} add deny all from any to ::0.0.0.0/96 via ${oif6}
-
- # Disallow packets to malicious 6to4 prefix.
- ${fwcmd} add deny all from 2002:e000::/20 to any via ${oif6}
- ${fwcmd} add deny all from any to 2002:e000::/20 via ${oif6}
- ${fwcmd} add deny all from 2002:7f00::/24 to any via ${oif6}
- ${fwcmd} add deny all from any to 2002:7f00::/24 via ${oif6}
- ${fwcmd} add deny all from 2002:0000::/24 to any via ${oif6}
- ${fwcmd} add deny all from any to 2002:0000::/24 via ${oif6}
- ${fwcmd} add deny all from 2002:ff00::/24 to any via ${oif6}
- ${fwcmd} add deny all from any to 2002:ff00::/24 via ${oif6}
-
- ${fwcmd} add deny all from 2002:0a00::/24 to any via ${oif6}
- ${fwcmd} add deny all from any to 2002:0a00::/24 via ${oif6}
- ${fwcmd} add deny all from 2002:ac10::/28 to any via ${oif6}
- ${fwcmd} add deny all from any to 2002:ac10::/28 via ${oif6}
- ${fwcmd} add deny all from 2002:c0a8::/32 to any via ${oif6}
- ${fwcmd} add deny all from any to 2002:c0a8::/32 via ${oif6}
-
- ${fwcmd} add deny all from ff05::/16 to any via ${oif6}
- ${fwcmd} add deny all from any to ff05::/16 via ${oif6}
- fi
-
- # Allow TCP through if setup succeeded
- ${fwcmd} add pass tcp from any to any established
-
- # Allow IP fragments to pass through
- ${fwcmd} add pass all from any to any frag
-
- # Allow setup of incoming email
- ${fwcmd} add pass tcp from any to me 25 setup
-
- # Allow access to our DNS
- ${fwcmd} add pass tcp from any to me 53 setup
- ${fwcmd} add pass udp from any to me 53
- ${fwcmd} add pass udp from me 53 to any
-
- # Allow access to our WWW
- ${fwcmd} add pass tcp from any to me 80 setup
-
- # Reject&Log all setup of incoming connections from the outside
- ${fwcmd} add deny log ip4 from any to any in via ${oif} setup proto tcp
- if [ -n "$inet6" ]; then
- ${fwcmd} add deny log ip6 from any to any in via ${oif6} \
- setup proto tcp
- fi
-
- # Allow setup of any other TCP connection
- ${fwcmd} add pass tcp from any to any setup
-
- # Allow DNS queries out in the world
- ${fwcmd} add pass udp from me to any 53 keep-state
-
- # Allow NTP queries out in the world
- ${fwcmd} add pass udp from me to any 123 keep-state
-
- # Everything else is denied by default, unless the
- # IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
- # config file.
- ;;
-
-[Ww][Oo][Rr][Kk][Ss][Tt][Aa][Tt][Ii][Oo][Nn])
- # Configuration:
- # firewall_myservices: List of ports/protocols on which this
- # host offers services.
- # firewall_allowservices: List of IPv4 and/or IPv6 addresses
- # that have access to
- # $firewall_myservices.
- # firewall_trusted: List of IPv4 and/or IPv6 addresses
- # that have full access to this host.
- # Be very careful when setting this.
- # This option can seriously degrade
- # the level of protection provided by
- # the firewall.
- # firewall_logdeny: Boolean (YES/NO) specifying if the
- # default denied packets should be
- # logged (in /var/log/security).
- # firewall_nologports: List of TCP/UDP ports for which
- # denied incoming packets are not
- # logged.
-
- # Allow packets for which a state has been built.
- ${fwcmd} add check-state
-
- # For services permitted below.
- ${fwcmd} add pass tcp from me to any established
-
- # Allow any connection out, adding state for each.
- ${fwcmd} add pass tcp from me to any setup keep-state
- ${fwcmd} add pass udp from me to any keep-state
- ${fwcmd} add pass icmp from me to any keep-state
- if [ $ipv6_available -eq 0 ]; then
- ${fwcmd} add pass ipv6-icmp from me to any keep-state
- fi
-
- # Allow DHCP.
- ${fwcmd} add pass udp from 0.0.0.0 68 to 255.255.255.255 67 out
- ${fwcmd} add pass udp from any 67 to me 68 in
- ${fwcmd} add pass udp from any 67 to 255.255.255.255 68 in
- if [ $ipv6_available -eq 0 ]; then
- ${fwcmd} add pass udp from fe80::/10 to me 546 in
- fi
- # Some servers will ping the IP while trying to decide if it's
- # still in use.
- ${fwcmd} add pass icmp from any to any icmptype 8
- if [ $ipv6_available -eq 0 ]; then
- ${fwcmd} add pass ipv6-icmp from any to any icmp6type 128,129
- fi
-
- # Allow "mandatory" ICMP in.
- ${fwcmd} add pass icmp from any to any icmptype 3,4,11
- if [ $ipv6_available -eq 0 ]; then
- ${fwcmd} add pass ipv6-icmp from any to any icmp6type 3
- fi
-
- # Add permits for this workstations published services below
- # Only IPs and nets in firewall_allowservices is allowed in.
- # If you really wish to let anyone use services on your
- # workstation, then set "firewall_allowservices='any'" in /etc/rc.conf
- #
- # Note: We don't use keep-state as that would allow DoS of
- # our statetable.
- # You can add 'keep-state' to the lines for slightly
- # better performance if you fell that DoS of your
- # workstation won't be a problem.
- #
- for i in ${firewall_allowservices} ; do
- for j in ${firewall_myservices} ; do
- case $j in
- [0-9A-Za-z]*/[Pp][Rr][Oo][Tt][Oo])
- ${fwcmd} add pass ${j%/[Pp][Rr][Oo][Tt][Oo]} from $i to me
- ;;
- [0-9A-Za-z]*/[Tt][Cc][Pp])
- ${fwcmd} add pass tcp from $i to me ${j%/[Tt][Cc][Pp]}
- ;;
- [0-9A-Za-z]*/[Uu][Dd][Pp])
- ${fwcmd} add pass udp from $i to me ${j%/[Uu][Dd][Pp]}
- ;;
- *[0-9A-Za-z])
- echo "Consider using ${j}/tcp in firewall_myservices." \
- > /dev/stderr
- ${fwcmd} add pass tcp from $i to me $j
- ;;
- *)
- echo "Invalid port in firewall_myservices: $j" > /dev/stderr
- ;;
- esac
- done
- done
-
- # Allow all connections from trusted IPs.
- # Playing with the content of firewall_trusted could seriously
- # degrade the level of protection provided by the firewall.
- for i in ${firewall_trusted} ; do
- ${fwcmd} add pass ip from $i to me
- done
-
- ${fwcmd} add 65000 count ip from any to any
-
- # Drop packets to ports where we don't want logging
- for i in ${firewall_nologports} ; do
- ${fwcmd} add deny { tcp or udp } from any to any $i in
- done
-
- # Broadcasts and multicasts
- ${fwcmd} add deny ip from any to 255.255.255.255
- ${fwcmd} add deny ip from any to 224.0.0.0/24 in # XXX
-
- # Noise from routers
- ${fwcmd} add deny udp from any to any 520 in
-
- # Noise from webbrowsing.
- # The stateful filter is a bit aggressive, and will cause some
- # connection teardowns to be logged.
- ${fwcmd} add deny tcp from any 80,443 to any 1024-65535 in
-
- # Deny and (if wanted) log the rest unconditionally.
- log=""
- if [ ${firewall_logdeny:-x} = "YES" -o ${firewall_logdeny:-x} = "yes" ] ; then
- log="log logamount 500" # The default of 100 is too low.
- sysctl net.inet.ip.fw.verbose=1 >/dev/null
- fi
- ${fwcmd} add deny $log ip from any to any
- ;;
-
-[Cc][Ll][Oo][Ss][Ee][Dd])
- ${fwcmd} add 65000 deny ip from any to any
- ;;
-[Uu][Nn][Kk][Nn][Oo][Ww][Nn])
- ;;
-*)
- if [ -r "${firewall_type}" ]; then
- ${fwcmd} ${firewall_flags} ${firewall_type}
- fi
- ;;
-esac