diff --git a/etc/rc.firewall b/etc/rc.firewall index 82f1b2e3030b..1755985f8888 100644 --- a/etc/rc.firewall +++ b/etc/rc.firewall @@ -1,288 +1,290 @@ # 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 firewall service. # # Suck in the configuration variables. if [ -r /etc/defaults/rc.conf ]; then . /etc/defaults/rc.conf source_rc_confs elif [ -r /etc/rc.conf ]; then . /etc/rc.conf 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 # 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 +# Building Internet Firewalls, 2nd Edition # Brent Chapman and Elizabeth Zwicky # # O'Reilly & Associates, Inc -# ISBN 1-56592-124-0 +# 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 & Internet Security # Repelling the wily hacker # William R. Cheswick, Steven M. Bellowin # # Addison-Wesley -# ISBN 0-201-6337-4 +# ISBN 0-201-63357-4 # http://www.awl.com/ +# http://www.awlonline.com/product/0%2C2627%2C0201633574%2C00.html # if [ -n "${1}" ]; then firewall_type="${1}" fi ############ # 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 ############ # 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 all from any to any via ${natd_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 ############ # Only in rare cases do you want to change these rules # ${fwcmd} add 100 pass all from any to any via lo0 ${fwcmd} add 200 deny all from any to 127.0.0.0/8 # If you're using 'options BRIDGE', uncomment the following line to pass ARP #${fwcmd} add 300 pass udp from 0.0.0.0 2054 to 0.0.0.0 # 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. ############ # set these to your network and netmask and ip net="192.0.2.0" mask="255.255.255.0" ip="192.0.2.1" # Allow any traffic to or from my own net. ${fwcmd} add pass all from ${ip} to ${net}:${mask} ${fwcmd} add pass all from ${net}:${mask} to ${ip} # 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 ${ip} 25 setup # Allow setup of outgoing TCP connections only ${fwcmd} add pass tcp from ${ip} 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 ${ip} to any 53 keep-state # Allow NTP queries out in the world ${fwcmd} add pass udp from ${ip} 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 named server 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 netmask and ip oif="ed0" onet="192.0.2.0" omask="255.255.255.240" oip="192.0.2.1" # set these to your inside interface network and netmask and ip iif="ed1" inet="192.0.2.16" imask="255.255.255.240" iip="192.0.2.17" # Stop spoofing ${fwcmd} add deny all from ${inet}:${imask} to any in via ${oif} ${fwcmd} add deny all from ${onet}:${omask} to any in via ${iif} # Stop RFC1918 nets on the outside interface ${fwcmd} add deny all from any to 10.0.0.0/8 via ${oif} ${fwcmd} add deny all from any to 172.16.0.0/12 via ${oif} ${fwcmd} add deny all from any to 192.168.0.0/16 via ${oif} # 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} add deny all from any to 0.0.0.0/8 via ${oif} ${fwcmd} add deny all from any to 169.254.0.0/16 via ${oif} ${fwcmd} add deny all from any to 192.0.2.0/24 via ${oif} ${fwcmd} add deny all from any to 224.0.0.0/4 via ${oif} ${fwcmd} add deny all from any to 240.0.0.0/4 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 all from any to any via ${natd_interface} fi ;; esac # Stop RFC1918 nets on the outside interface ${fwcmd} add deny all from 10.0.0.0/8 to any via ${oif} ${fwcmd} add deny all from 172.16.0.0/12 to any via ${oif} ${fwcmd} add deny all from 192.168.0.0/16 to any via ${oif} # 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} add deny all from 0.0.0.0/8 to any via ${oif} ${fwcmd} add deny all from 169.254.0.0/16 to any via ${oif} ${fwcmd} add deny all from 192.0.2.0/24 to any via ${oif} ${fwcmd} add deny all from 224.0.0.0/4 to any via ${oif} ${fwcmd} add deny all from 240.0.0.0/4 to any via ${oif} # 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 ${oip} 25 setup # Allow access to our DNS ${fwcmd} add pass tcp from any to ${oip} 53 setup ${fwcmd} add pass udp from any to ${oip} 53 ${fwcmd} add pass udp from ${oip} 53 to any # Allow access to our WWW ${fwcmd} add pass tcp from any to ${oip} 80 setup # Reject&Log all setup of incoming connections from the outside ${fwcmd} add deny log tcp from any to any in via ${oif} setup # 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 ${oip} to any 53 keep-state # Allow NTP queries out in the world ${fwcmd} add pass udp from ${oip} to any 123 keep-state # Everything else is denied by default, unless the # IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel # config file. ;; [Uu][Nn][Kk][Nn][Oo][Ww][Nn]) ;; *) if [ -r "${firewall_type}" ]; then ${fwcmd} ${firewall_flags} ${firewall_type} fi ;; esac diff --git a/etc/rc.firewall6 b/etc/rc.firewall6 index df2d7a23c8f6..646d3d11c1d2 100644 --- a/etc/rc.firewall6 +++ b/etc/rc.firewall6 @@ -1,257 +1,259 @@ ############ # Setup system for IPv6 firewall service. # $FreeBSD$ # Suck in the configuration variables. if [ -z "${source_rc_confs_defined}" ]; then if [ -r /etc/defaults/rc.conf ]; then . /etc/defaults/rc.conf source_rc_confs elif [ -r /etc/rc.conf ]; then . /etc/rc.conf fi fi ############ # Define the firewall type in /etc/rc.conf. Valid values are: # open - will allow anyone in # client - will try to protect just this machine # simple - will try to protect a whole network # closed - totally disables IP services except via lo0 interface # UNKNOWN - disables the loading of firewall rules. # filename - will load the rules in the given filename (full path required) # # For ``client'' and ``simple'' the entries below should be customized # appropriately. ############ # # If you don't know enough about packet filtering, we suggest that you # take time to read this book: # -# Building Internet Firewalls +# Building Internet Firewalls, 2nd Edition # Brent Chapman and Elizabeth Zwicky # # O'Reilly & Associates, Inc -# ISBN 1-56592-124-0 +# ISBN 1-56592-871-7 # http://www.ora.com/ +# http://www.oreilly.com/catalog/fire2/ # # For a more advanced treatment of Internet Security read: # # Firewalls & Internet Security # Repelling the wily hacker # William R. Cheswick, Steven M. Bellowin # # Addison-Wesley -# ISBN 0-201-6337-4 +# ISBN 0-201-63357-4 # http://www.awl.com/ +# http://www.awlonline.com/product/0%2C2627%2C0201633574%2C00.html # if [ -n "${1}" ]; then ipv6_firewall_type="${1}" fi ############ # Set quiet mode if requested # case ${ipv6_firewall_quiet} in [Yy][Ee][Ss]) fw6cmd="/sbin/ip6fw -q" ;; *) fw6cmd="/sbin/ip6fw" ;; esac ############ # Flush out the list before we begin. # ${fw6cmd} -f flush ############ # 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 ipv6_firewall_type to ``open''. # # ${fw6cmd} add 65000 pass all from any to any ############ # Only in rare cases do you want to change these rules # ${fw6cmd} add 100 pass all from any to any via lo0 # # ND # # DAD ${fw6cmd} add pass ipv6-icmp from ff02::/16 to :: ${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 # Prototype setups. # case ${ipv6_firewall_type} in [Oo][Pp][Ee][Nn]) ${fw6cmd} 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. ############ # set these to your network and prefixlen and ip # # This needs more work # net="3ffe:505:2:1::" prefixlen="64" ip="3ffe:505:2:1::1" # Allow any traffic to or from my own net. ${fw6cmd} add pass all from ${ip} to ${net}/${prefixlen} ${fw6cmd} add pass all from ${net}/${prefixlen} to ${ip} # 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 ${ip} 25 setup # Allow setup of outgoing TCP connections only ${fw6cmd} add pass tcp from ${ip} to any setup # Disallow setup of all other TCP connections ${fw6cmd} add deny tcp from any to any setup # Allow DNS queries out in the world ${fw6cmd} add pass udp from any 53 to ${ip} ${fw6cmd} add pass udp from ${ip} to any 53 # Allow NTP queries out in the world ${fw6cmd} add pass udp from any 123 to ${ip} ${fw6cmd} add pass udp from ${ip} to any 123 # 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 named server 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="3ffe:505:2:1::" oprefixlen="64" oip="3ffe:505:2:1::1" # set these to your inside interface network and prefixlen and ip iif="ed1" inet="3ffe:505:2:2::" iprefixlen="64" iip="3ffe:505:2:2::1" # 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 site-local on the outside interface ${fw6cmd} add deny all from ff02::/16 to any via ${oif} ${fw6cmd} add deny all from any to ff02::/16 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::/32 to any via ${oif} ${fw6cmd} add deny all from any to ff05::/32 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 ${oip} to any 123 # RIPng #${fw6cmd} add pass udp from fe80::/10 521 to ff02::9 521 # Everything else is denied by default, unless the # IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel # config file. ;; [Uu][Nn][Kk][Nn][Oo][Ww][Nn]) ;; *) if [ -r "${ipv6_firewall_type}" ]; then ${fw6cmd} ${ipv6_firewall_flags} ${ipv6_firewall_type} fi ;; esac