101 lines
3.7 KiB
Bash
Executable File
101 lines
3.7 KiB
Bash
Executable File
#!/bin/bash
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# By Brielle Bruns <bruns@2mbit.com>
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# URL: http://www.sosdg.org/freestuff/firewall
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# License: GPLv3
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#
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# Copyright (C) 2009 - 2010 Brielle Bruns
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# Copyright (C) 2009 - 2010 The Summit Open Source Development Group
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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# This file defines static variables that we will be using. Normally, you
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# should not be needing to edit these. You can override them in your options
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# file easily, thus avoiding problems with overwriting settings during upgrades.
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# You should always make sure this file is from the most recent firewall package,
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# as missing variables here could foul up the firewall's ability to setup rules
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# correctly.
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# These defines are here to help pre-1.0 users easily upgrade, defines critical defaults
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# that would otherwise require remaking their options file. I leave this on by default,
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# but if you want to make sure you have a current options file, define this to 0.
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if [[ "$COMPAT_CONFIG" == "1" ]]; then
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MODPROBE=`which modprobe`
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PRERUN="$BASEDIR/prerun"
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POSTRUN="$BASEDIR/postrun"
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fi
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# ANSI color sequences
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BLUE="\E[34m"
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GREEN="\E[32m"
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RED="\E[31m"
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YELLOW="\E[33m"
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PURPLE="\E[35m"
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AQUA="\E[36m"
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WHITE="\E[1m"
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GREY="\E[37m"
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DEFAULT_COLOR="\E[39m"
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# Module names that we may need to load
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MOD_U32="xt_u32"
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# Location of the ipv4 network conf in proc
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PROC_NET_IPV4="/proc/sys/net/ipv4/conf"
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# Multiport options - override in options
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NF_MULTIPORT="xt_multiport"
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NF_MULTIPORT_MAX_PORTS="7"
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# RFC 1918 Space
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RFC1918_SPACE="192.168.0.0/16 172.16.0.0/12 10.0.0.0/8"
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# By default, use conntrack instead of state
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STATE_TYPE="conntrack"
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# Auto detect multiport
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IPTABLES_MULTIPORT=auto
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# Where we store output of cached rules
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RULE_CACHE=$BASEDIR/cache/ipt-rules
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RULE_CACHE_V6=$BASEDIR/cache/ipt6-rules
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EXTIP="auto"
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EXTIF="eth0"
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EXTIF_FIND="$BASEDIR/bin/get_default_if"
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EXTIP_FIND="$BASEDIR/bin/get_default_ip"
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# By default, we allow ipv6 critical icmp
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IPV6_ICMP_CRITICAL=1
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# IPv4 and IPv6 regex matches to determine if entry is valid. These may need
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# to be tweaked over time. At the moment, we use by default the pattern here:
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# http://stackoverflow.com/questions/53497/regular-expression-that-matches-valid-ipv6-addresses
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IPV4_MATCH="(?:(?>(?>([a-f0-9]{1,4})(?>:(?1)){7})|(?>(?!(?:.*[a-f0-9](?>:|$)){8,})((?1)(?>:(?1)){0,6})?::(?2)?))|(?>(?>(?>(?1)(?>:(?1)){5}:)|(?>(?!(?:.*[a-f0-9]:){6,})((?1)(?>:(?1)){0,4})?::(?>(?3):)?))?(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(?>\.(?4)){3}))"
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IPV6_MATCH="(?:(?>(?>([a-f0-9]{1,4})(?>:(?1)){7})|(?>(?!(?:.*[a-f0-9](?>:|$)){8,})((?1)(?>:(?1)){0,6})?::(?2)?))|(?>(?>(?>(?1)(?>:(?1)){5}:)|(?>(?!(?:.*[a-f0-9]:){6,})((?1)(?>:(?1)){0,4})?::(?>(?3):)?))?(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(?>\.(?4)){3}))"
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# At the moment I don't have a valid way of verifying ranges within a certain constraint (ie /0 through /32)
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# If anyone wants to write these, feel free to!
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IPV4_NETMASK_MATCH=""
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IPV6_NETMASK_MATCH=""
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# Default policies for IPv4 and IPv6. Make these ACCEPT by default, except for FORWARD,
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# since one wrong configuration can lock someone out.
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IPV4_PINPUT=ACCEPT
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IPV4_POUTPUT=ACCEPT
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IPV4_PFORWARD=DROP
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IPV6_PINPUT=ACCEPT
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IPV6_POUTPUT=ACCEPT
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IPV6_PFORWARD=DROP |