Firewall-SOSDG/bin/firewall-sosdg

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Executable File

#/bin/bash
# By Brielle Bruns <bruns@2mbit.com>
# URL: http://www.sosdg.org/freestuff/firewall
# License: GPLv3
#
# Copyright (C) 2009 - 2010 Brielle Bruns
# Copyright (C) 2009 - 2010 The Summit Open Source Development Group
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
FW_VERSION="0.9.11"
# These option is here to help pre-1.0 users easily upgrade, defines critical defaults
# that would otherwise require remaking their options file. I leave this on by default,
# but if you want to make sure you have a current options file, define this to 0.
COMPAT_CONFIG=1
BASEDIR=/etc/firewall-sosdg
PATH=/usr/sbin:/usr/bin:/sbin:/bin
#BASEDIR=`pwd`
TWEAKS=$BASEDIR/tweaks
if [ ! -r $BASEDIR/include/static ] || [ ! -r $BASEDIR/include/functions ]; then
echo "Error: Missing either include/static or include/functions. These are critical to operation"
echo "of this script. Please make sure they are readable and exist!"
exit 1
fi
. $BASEDIR/include/static
if [ -r $BASEDIR/options ]; then
. $BASEDIR/options
else
echo -e "${RED}Error: Can not load options file. Did you forget to rename options.default?"
exit 1
fi
. $BASEDIR/include/functions
while [ $# -gt 0 ]; do
case "$1" in
-f|--flush)
iptables_policy_reset ipv4 ACCEPT
iptables_policy_reset ipv6 ACCEPT
iptables_rules_flush ipv4
iptables_rules_flush ipv6
exit 0
;;
-h|--help)
show_help
exit 0
;;
--generate-cache)
GEN_CACHE="force"
;;
esac
shift
done
if [ ${PORTFW} ] && [ ! -r "${PORTFW}" ]; then
display_c RED "Error: Missing ${PORTFW} as defined in the PORTFW option. Please make sure"
display_c RED "it exists, or comment out the PORTFW line in options."
exit 1
fi
echo "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Firewall/SOSDG ${FW_VERSION}
Brielle Bruns <bruns@2mbit.com>
http://www.sosdg.org/freestuff/firewall
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to
redistribute it under certain conditions.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-="
if [ "$UID" != "0" ]; then
display_c RED "You must be root to run this script."
exit 2
fi
if [ ! -x "$IPTABLES" ]; then
display_c RED "iptables command not found. Please make sure you have the iptables"
display_c RED "installed (package or source) and you have the IPTABLES option properly"
display_c RED "defined in the 'options' file."
exit 3
fi
if [ ! -x "$IP6TABLES" ] && [ $IPV6 == "1" ]; then
display_c RED "ip6tables command not found. Please make sure you have the iptables"
display_c RED "installed (package or source) and you have the IP6TABLES option properly"
display_c RED "defined in the 'options' file."
exit 3
fi
if [[ "$EXTIF" == "auto" ]]; then
EXTIF=`$EXTIF_FIND`
display_c YELLOW "Found default interface at: ${BLUE}${EXTIF}${DEFAULT_COLOR}"
fi
if [[ "$EXTIP" == "auto" ]]; then
EXTIP=`$EXTIP_FIND ${EXTIF}`
display_c YELLOW "Found default interface IP at: ${BLUE}${EXTIP}${DEFAULT_COLOR}"
fi
iptables_rules_flush ipv4
if [ -s "$BASEDIR/include/ipv4_custom_flush" ]; then
display_c YELLOW "Loading custom flush rules..."
. "$BASEDIR/include/ipv4_custom_flush"
fi
if [ -x "$PRERUN" ]; then
$PRERUN
fi
if [ "$MODULES_LOAD" ]; then
display_c YELLOW "Loading modules: " N
for i in $MODULES_LOAD; do
display_c BLUE "$i " N
${MODPROBE} $i
done
echo -ne "\n"
fi
if [ "$STATE_TYPE" ]; then
case $STATE_TYPE in
conntrack|CONNTRACK|*)
M_STATE="-m conntrack"
C_STATE="--ctstate"
;;
state|STATE)
M_STATE="-m state"
C_STATE="--state"
esac
else
M_STATE="-m conntrack"
C_STATE="--ctstate"
fi
if [ "$GEN_CACHE" ]; then
case $GEN_CACHE in
force)
IPTABLES="write_out_rules"
if [ "$IPV6" ]; then
IP6TABLES="write_out_rules_v6"
rm -f "${RULE_CACHE_V6}" &>/dev/null
fi
rm -f "${RULE_CACHE}" &>/dev/null
;;
esac
fi
$IPTABLES -A INPUT -i lo -j ACCEPT
$IPTABLES -A OUTPUT -o lo -j ACCEPT
if [ -s "$BASEDIR/include/ipv4_custom_trust" ]; then
display_c YELLOW "Loading custom trust rules..."
. "$BASEDIR/include/ipv4_custom_trust"
fi
if [ "$TRUSTEDIP" ]; then
display_c YELLOW "Adding trusted IP: " N
for i in $TRUSTEDIP; do
echo -n "$i "
$IPTABLES -A INPUT -s $i -j ACCEPT
$IPTABLES -A OUTPUT -d $i -j ACCEPT
done
echo -ne "\n"
fi
if [ "$CLAMPMSS" ]; then
display_c YELLOW "Clamping MSS to PMTU..."
for i in $CLAMPMSS; do
$IPTABLES -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS \
--clamp-mss-to-pmtu -o $i -m tcpmss --mss 1400:1536
$IPTABLES -A OUTPUT -p tcp --tcp-flags SYN,RST SYN -j TCPMSS \
--clamp-mss-to-pmtu -o $i -m tcpmss --mss 1400:1536
done
echo -en "\n"
fi
if [ "$DNS_REQUESTS_OUT" ]; then
display_c YELLOW "Adding DNS reply allows for trusted DNS servers.."
for i in $DNS_REQUESTS_OUT; do
if [[ "$i" =~ "|" ]]; then
IFS_OLD=${IFS};IFS=\|
DNSREQ=($i)
IFS=${IFS_OLD}
SRCIF=${DNSREQ[0]}
DNSIP_NUM=${#DNSREQ[@]}
DNSIP_COUNT_CURR=1
for ((i=$DNSIP_COUNT_CURR; i <= $DNSIP_NUM; i++)); do
if [ ${DNSREQ[$i]} ]; then
${IPTABLES} -A INPUT -i ${SRCIF} -p udp --sport 53 -s ${DNSREQ[$i]} --destination-port 1024:65535 -j ACCEPT
fi
done
else
${IPTABLES} -A INPUT -i $i -p udp --sport 53 --destination-port 1024:65535 -j ACCEPT
fi
done
fi
if [ -s "$BASEDIR/include/ipv4_custom_blockip" ]; then
display_c YELLOW "Loading custom ip block rules..."
. "$BASEDIR/include/ipv4_custom_blockip"
fi
if [ "$BLOCKEDIP" ]; then
display_c YELLOW "Adding blocked IPs... "
for i in `grep -v "\#" $BLOCKEDIP`; do
#echo -n "$i "
if [[ "$i" =~ "|" ]]; then
IFS_OLD=${IFS};IFS=\|
ADVBLKIP=($i)
IFS=${IFS_OLD}
SRCIF=${ADVBLKIP[0]}
SRCIP=${ADVBLKIP[1]}
SRCPORT=${ADVBLKIP[2]}
DSTIF=${ADVBLKIP[3]}
DSTIP=${ADVBLKIP[4]}
DSTPORT=${ADVBLKIP[5]}
DIRECTION=${ADVBLKIP[6]}
PROTO=${ADVBLKIP[7]}
if [ "$SRCIF" ]; then
SRCIF="-i ${SRCIF} "
fi
if [ "$SRCIP" ]; then
SRCIP="-s ${SRCIP} "
fi
if [ "$SRCPORT" ]; then
SRCPORT="--sport ${SRCPORT/-/:} "
fi
if [ "$DSTIF" ]; then
DSTIF="-o ${DSTIF} "
fi
if [ "$DSTIP" ]; then
DSTIP="-d ${DSTIP} "
fi
if [ "$DSTPORT" ]; then
DSTPORT="--dport ${DSTPORT/-/:} "
fi
if [ "$PROTO" ]; then
case $PROTO in
TCP|tcp) PROTO="-p tcp";;
UDP|udp) PROTO="-p udp";;
*) PROTO="-p ${PROTO}";;
esac
fi
case $DIRECTION in
IN) DIRECTION="INPUT" ;;
OUT) DIRECTION="OUTPUT" ;;
FWD) DIRECTION="FORWARD" ;;
*) DIRECTION="INPUT" ;;
esac
${IPTABLES} -A ${DIRECTION} ${PROTO} ${SRCIF} ${SRCIP} ${SRCPORT} ${DSTIF} ${DSTIP} ${DSTPORT} -j DROP
else
$IPTABLES -A INPUT -s $i -j DROP
$IPTABLES -A OUTPUT -d $i -j DROP
fi
done
fi
if [ "$BLOCK_OUTGOING_RFC1918" ]; then
display_c YELLOW "Blocking RFC1918 space going out on: " N
for i in $BLOCK_OUTGOING_RFC1918; do
display_c BLUE "$i " N
for x in $RFC1918_SPACE; do
$IPTABLES -A INPUT -i $i -s $x -j DROP
$IPTABLES -A FORWARD -i $i -s $x -j DROP
done
done
echo -ne "\n"
unset i x
fi
if [ "$BLOCK_INCOMING_RFC1918" ]; then
display_c YELLOW "Blocking RFC1918 space coming in on: " N
for i in $BLOCK_INCOMING_RFC1918; do
display_c BLUE "$i " N
for x in $RFC1918_SPACE; do
$IPTABLES -A INPUT -i $i -s $x -j DROP
$IPTABLES -A FORWARD -i $i -s $x -j DROP
done
done
echo -ne "\n"
unset i x
fi
if [ "$STRIPECN" ]; then
display_c YELLOW "Stripping ECN off of TCP packets to " N
for i in $STRIPECN; do
echo -en "$i "
$IPTABLES -A PREROUTING -t mangle -p tcp -d $i -j ECN \
--ecn-tcp-remove
done
echo -ne "\n"
fi
if [ -s "$BASEDIR/include/ipv4_custom_mssclamp" ]; then
display_c YELLOW "Loading custom MSS Clamp rules..."
. "$BASEDIR/include/ipv4_custom_mssclamp"
fi
if [ "$HACK_IPV4" ]; then
apply_ipv4_hack $HACK_IPV4
fi
if [ -s "$BASEDIR/include/ipv4_custom_conntrack" ]; then
display_c YELLOW "Loading custom conntrack rules..."
. "$BASEDIR/include/ipv4_custom_conntrack"
fi
if [ "$CONNTRACK" ]; then
$IPTABLES -A INPUT ${M_STATE} ${C_STATE} NEW -j ACCEPT
$IPTABLES -A INPUT ${M_STATE} ${C_STATE} RELATED,ESTABLISHED -j ACCEPT
$IPTABLES -A FORWARD ${M_STATE} ${C_STATE} RELATED,ESTABLISHED -j ACCEPT
#$IPTABLES -A FORWARD ${M_STATE} ${C_STATE} NEW -j ACCEPT
$IPTABLES -A OUTPUT ${M_STATE} ${C_STATE} RELATED,ESTABLISHED -j ACCEPT
$IPTABLES -A OUTPUT ${M_STATE} ${C_STATE} NEW -j ACCEPT
$IPTABLES -A INPUT ${M_STATE} ${C_STATE} INVALID -j DROP
$IPTABLES -A OUTPUT ${M_STATE} ${C_STATE} INVALID -j DROP
$IPTABLES -A FORWARD ${M_STATE} ${C_STATE} INVALID -j DROP
fi
if [ -s "$BASEDIR/include/ipv4_custom_blockoutports" ]; then
display_c YELLOW "Loading custom blocked outbound port rules..."
. "$BASEDIR/include/ipv4_custom_blockoutports"
fi
if [ "$BLOCKTCPPORTS" ] || [ "$BLOCKUDPPORTS" ]; then
display_c YELLOW "Blocking outbound port: " N
if [ "$BLOCKTCPPORTS" ]; then
for i in $BLOCKTCPPORTS; do
echo -en "${PURPLE}TCP${DEFAULT_COLOR}/${GREEN}$i "
$IPTABLES -A OUTPUT -p tcp --dport $i --syn -j DROP
done
fi
if [ "$BLOCKUDPPORTS" ]; then
for i in $BLOCKUDPPORTS; do
echo -en "${BLUE}UDP${DEFAULT_COLOR}/${GREEN}$i "
$IPTABLES -A OUTPUT -p udp --dport $i -j DROP
done
fi
reset_color
fi
if [ -s "$BASEDIR/include/ipv4_custom_allowedports" ]; then
display_c YELLOW "Loading custom allowed port rules..."
. "$BASEDIR/include/ipv4_custom_allowedports"
fi
if [ "$IPTABLES_MULTIPORT" ]; then
case $IPTABLES_MULTIPORT in
auto|AUTO|Auto)
if `${MODPROBE} ${NF_MULTIPORT} &>/dev/null`; then
display_c YELLOW "Multiport successfully loaded."
IPTABLES_MULTIPORT="yes"
else
display_c RED "Multiport was not loaded successfully. Disabling."
IPTABLES_MULTIPORT="no"
fi ;;
yes|YES|Yes)
${MODPROBE} ${NF_MULTIPORT}
display_c PURPLE "Multiport loading forced, not error checking."
IPTABLES_MULTIPORT="yes" ;;
*) IPTABLES_MULTIPORT="no"
esac
fi
if [ "$TCPPORTS" ] || [ "$UDPPORTS" ]; then
display_c YELLOW "Adding allowed port: " N
if [ "$TCPPORTS" ]; then
if [ "$IPTABLES_MULTIPORT" == "yes" ] && [ "$NF_MULTIPORT_MAX_PORTS" ]; then
TCPPORTS=($TCPPORTS)
PORTS_COUNT=${#TCPPORTS[@]}
PORTS_COUNT_CURR=0
while (( "$PORTS_COUNT_CURR" < "$PORTS_COUNT" )); do
for ((i=$PORTS_COUNT_CURR; i <=(($PORTS_COUNT_CURR+(($NF_MULTIPORT_MAX_PORTS-1)))); i++)); do
if [ ${TCPPORTS[$i]} ]; then
PORTS="${PORTS},${TCPPORTS[$i]}"
fi
done
echo -en "${PURPLE}Multiport-TCP${DEFAULT_COLOR}/${GREEN}${PORTS#,} "
$IPTABLES -A INPUT -p tcp -m multiport --dports ${PORTS#,} -j ACCEPT
unset PORTS
PORTS_COUNT_CURR=$i
done
unset i PORTS PORTS_COUNT_CURR PORTS_COUNT
else
for i in $TCPPORTS; do
echo -en "${PURPLE}TCP${DEFAULT_COLOR}/${GREEN}$i "
$IPTABLES -A INPUT -p tcp --dport $i -j ACCEPT
done
fi
fi
if [ "$UDPPORTS" ]; then
for i in $UDPPORTS; do
echo -en "${BLUE}UDP${DEFAULT_COLOR}/${GREEN}$i "
#$IPTABLES -A INPUT -p udp --dport $i -j ACCEPT
$IPTABLES -A OUTPUT -p udp --sport 1:65535 --dport $i -j ACCEPT
$IPTABLES -A INPUT -p udp --dport $i --sport 1:65535 -j ACCEPT
$IPTABLES -A INPUT -p udp --sport $i --dport 1:65535 -j ACCEPT
done
fi
reset_color
fi
if [ -s "$BASEDIR/include/ipv4_custom_proto" ]; then
display_c YELLOW "Loading custom protocol rules..."
. "$BASEDIR/include/ipv4_custom_proto"
fi
if [ "$ALLOWEDPROTO" ]; then
display_c YELLOW "Adding allowed protocols: " N
for i in $ALLOWEDPROTO; do
echo -n "$i "
$IPTABLES -A INPUT -p $i -j ACCEPT
$IPTABLES -A OUTPUT -p $i -j ACCEPT
done
reset_color
fi
if [ -s "$BASEDIR/include/ipv4_custom_notrack" ]; then
display_c YELLOW "Loading custom NOTRACK rules..."
. "$BASEDIR/include/ipv4_custom_notrack"
fi
if [ $CONNTRACK ]; then
for i in $DONTTRACK; do
$IPTABLES -t raw -I PREROUTING -s $i -j NOTRACK
$IPTABLES -t raw -I PREROUTING -d $i -j NOTRACK
$IPTABLES -t raw -I OUTPUT -s $i -j NOTRACK
$IPTABLES -t raw -I OUTPUT -d $i -j NOTRACK
done
fi
if [ -s "$BASEDIR/include/ipv4_custom_routing" ]; then
display_c YELLOW "Loading custom routing rules..."
. "$BASEDIR/include/ipv4_custom_routing"
fi
if [ $ROUTING ]; then
display_c YELLOW "Adding route: "
for i in `grep -v "\#" $ROUTING`; do
ROUTE=( ${i//:/ } )
FWINT1=${ROUTE[0]}
FWINT2=${ROUTE[2]}
FWIP1=${ROUTE[1]}
FWIP2=${ROUTE[3]}
if [ -e "/proc/sys/net/ipv4/conf/$FWINT1/forwarding" ]; then
echo 1 > /proc/sys/net/ipv4/conf/$FWINT1/forwarding
fi
if [ -e "/proc/sys/net/ipv4/conf/$FWINT2/forwarding" ]; then
echo 1 > /proc/sys/net/ipv4/conf/$FWINT2/forwarding
fi
$IPTABLES -A FORWARD -i $FWINT1 -o $FWINT2 \
-s $FWIP1 -d $FWIP2 -j ACCEPT
if [ ${ROUTE[4]} == "1" ]; then
display_c DEFAULT "\t${GREEN}$FWINT1:${PURPLE}$FWIP1${AQUA}<->${BLUE}$FWINT2:$FWIP2"
$IPTABLES -A FORWARD -o $FWINT1 -i $FWINT2 \
-d $FWIP1 -s $FWIP2 -j ACCEPT
else
display_c DEFAULT "\t${GREEN}$FWINT1:${PURPLE}$FWIP1${AQUA}->${BLUE}$FWINT2:$FWIP2"
fi
done
echo -ne "\n"
fi
if [ -s "$BASEDIR/include/ipv4_custom_portforward" ]; then
display_c YELLOW "Loading custom port forwarding rules..."
. "$BASEDIR/include/ipv4_custom_portforward"
fi
if [ "$PORTFW" ] && [ "$NAT" ]; then
display_c YELLOW "Adding port forward for:"
for i in `grep -v "\#" $PORTFW`; do
IFS_OLD=${IFS};IFS=\:
PORTFWADD=($i)
IFS=${IFS_OLD}
DSTIF=${PORTFWADD[0]}
SRCIP=${PORTFWADD[1]}
DSTIP=${PORTFWADD[2]}
DSTPORT=${PORTFWADD[3]}
DSTPROTO=${PORTFWADD[4]}
DSTINTIP=${PORTFWADD[5]}
DSTINTPORT=${PORTFWADD[6]}
if [ "$DSTIF" ]; then
DSTIF="-i ${DSTIF}"
fi
if [ "$SRCIP" ]; then
SRCIP="-s ${SRCIP}"
fi
if [ "$DSTIP" ]; then
DSTIP="-d $DSTIP"
fi
if [ ! "$DSTIP" ] && [ ! "$DSTIF" ]; then
DSTIP="-d $EXTIP"
fi
#PORTADD=( ${i//:/ } )
$IPTABLES -A PREROUTING -t nat ${DSTIF} -p ${DSTPROTO} ${SRCIP} \
--dport ${DSTPORT} ${DSTIP} -j DNAT --to \
${DSTINTIP}:${DSTINTPORT}
$IPTABLES -A INPUT -p ${DSTPROTO} ${M_STATE} ${C_STATE} NEW ${DSTIF} ${SRCIP} \
--dport ${DSTPORT} ${DSTIP} -j ACCEPT
display_c DEFAULT "\t${GREEN}${PORTFWADD[0]}:${BLUE}${PORTFWADD[1]}:${PURPLE}${PORTFWADD[2]}:${PORTFWADD[3]}:${PORTFWADD[4]}${AQUA}->${BLUE}${PORTFWADD[5]}:${PORTFWADD[6]} "
done
reset_color
fi
if [ "$LANDHCPSERVER" ]; then
for i in $LANDHCPSERVER; do
$IPTABLES -A INPUT -i $i -s 0.0.0.0 -j ACCEPT
$IPTABLES -A INPUT -i $i -p udp --dport 67:68 -j ACCEPT
$IPTABLES -A INPUT -i $i -p tcp --dport 67:68 -j ACCEPT
$IPTABLES -A OUTPUT -o $i -p udp --dport 67:68 -j ACCEPT
$IPTABLES -A OUTPUT -o $i -p tcp --dport 67:68 -j ACCEPT
$IPTABLES -A INPUT -i $i -p udp -d 255.255.255.255 --dport 67:68 -j ACCEPT
$IPTABLES -A INPUT -i $i -p tcp -d 255.255.255.255 --dport 67:68 -j ACCEPT
$IPTABLES -A OUTPUT -o $i -p udp -d 255.255.255.255 --dport 67:68 -j ACCEPT
$IPTABLES -A OUTPUT -o $i -p tcp -d 255.255.255.255 --dport 67:68 -j ACCEPT
done
fi
if [ -s "$BASEDIR/include/ipv4_custom_mark" ]; then
display_c YELLOW "Loading custom mark rules..."
. "$BASEDIR/include/ipv4_custom_mark"
fi
if [ -r "$IPv4_MARK" ]; then
display_c YELLOW "Adding mark: "
for i in `grep -v "\#" $IPv4_MARK`; do
MARK=( ${i//|/ } )
INIF=${MARK[0]}
INIP=${MARK[1]}
DSTIP=${MARK[2]}
IPMARK=${MARK[3]}
case $INIP in
!*) INNEG="!"
INIP=${INIP#\!};;
esac
case $DSTIP in
!*) DSTNEG="!"
DSTIP=${DSTIP#\!};;
esac
$IPTABLES -t mangle -A PREROUTING -i ${INIF} ${INNEG} -s ${INIP} \
${DSTNEG} -d ${DSTIP} -j MARK --set-mark=${IPMARK}
display_c DEFAULT "\t${GREEN}${INNEG}${INIF}:${PURPLE}${INIP}${AQUA}->${BLUE}${DSTNEG}${DSTIP}:${RED}${IPMARK}"
unset INNEG DSTNEG
done
echo -ne "\n"
fi
if [ -s "$BASEDIR/include/ipv4_custom_nat" ]; then
display_c YELLOW "Loading custom nat rules..."
. "$BASEDIR/include/ipv4_custom_nat"
fi
if [ $NAT ]; then
if [ "$NAT_RANGE" ]; then
display_c YELLOW "Adding NAT rule:"
unset INIF_EXISTS FWDIF_EXISTS
for i in $NAT_RANGE; do
NAT_RULE=( ${i//:/ } )
case ${NAT_RULE[0]} in
SNAT)
$IPTABLES -A POSTROUTING -t nat -s ${NAT_RULE[2]} -j SNAT \
-o ${NAT_RULE[3]} --to-source ${NAT_RULE[4]}
display_c DEFAULT "\t${GREEN}SNAT:${PURPLE}${NAT_RULE[1]}:${NAT_RULE[2]}${AQUA}->${BLUE}${NAT_RULE[3]}:${NAT_RULE[4]}"
if [[ ! "$INIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}" ]]; then
$IPTABLES -A INPUT -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} \
-s ${NAT_RULE[2]} -j ACCEPT
$IPTABLES -A INPUT -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} \
-s ${NAT_RULE[2]} -j ACCEPT
INIF_EXISTS="${INIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}"
fi
# This code seems pointless, anyone else have an opinion?
#if [[ ! "$OUTIF_EXISTS" =~ "${NAT_RULE[3]}:${NAT_RULE[4]}" ]]; then
# $IPTABLES -A OUTPUT -p icmp --icmp-type time-exceeded -o ${NAT_RULE[3]} -j ACCEPT
# $IPTABLES -A OUTPUT -p icmp --icmp-type fragmentation-needed -o ${NAT_RULE[3]} -j ACCEPT
# OUTIF_EXISTS="${OUTIF_EXISTS} ${NAT_RULE[3]}:${NAT_RULE[4]}"
#fi
if [[ ! "$FWDIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}" ]]; then
$IPTABLES -A FORWARD -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
-o ${NAT_RULE[3]} -j ACCEPT
$IPTABLES -A FORWARD -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
-o ${NAT_RULE[3]} -j ACCEPT
FWDIF_EXISTS="${FWDIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}"
fi
;;
MASQ)
$IPTABLES -A POSTROUTING -t nat -s ${NAT_RULE[2]} -j MASQUERADE -o ${NAT_RULE[3]}
display_c DEFAULT "\t${GREEN}MASQ:${PURPLE}${NAT_RULE[2]}${AQUA}->${BLUE}${NAT_RULE[3]}"
if [[ ! "$INIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}" ]]; then
$IPTABLES -A INPUT -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} \
-s ${NAT_RULE[2]} -j ACCEPT
$IPTABLES -A INPUT -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} \
-s ${NAT_RULE[2]} -j ACCEPT
INIF_EXISTS="${INIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}"
fi
if [[ ! "$FWDIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}" ]]; then
$IPTABLES -A FORWARD -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
-o ${NAT_RULE[3]} -j ACCEPT
$IPTABLES -A FORWARD -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
-o ${NAT_RULE[3]} -j ACCEPT
FWDIF_EXISTS="${FWDIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}"
fi
;;
NETMAP)
$IPTABLES -A PREROUTING -t nat -s ${NAT_RULE[2]} -j NETMAP --to ${NAT_RULE[4]}
display_c DEFAULT "\t${GREEN}NETMAP:${PURPLE}${NAT_RULE[2]}${AQUA}->${BLUE}${NAT_RULE[4]}"
if [[ ! "$INIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}" ]]; then
$IPTABLES -A INPUT -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} \
-s ${NAT_RULE[2]} -j ACCEPT
$IPTABLES -A INPUT -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} \
-s ${NAT_RULE[2]} -j ACCEPT
INIF_EXISTS="${INIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}"
fi
if [[ ! "$FWDIF_EXISTS" =~ "${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}" ]]; then
$IPTABLES -A FORWARD -p icmp --icmp-type time-exceeded -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
-o ${NAT_RULE[3]} -j ACCEPT
$IPTABLES -A FORWARD -p icmp --icmp-type fragmentation-needed -i ${NAT_RULE[1]} -s ${NAT_RULE[2]} \
-o ${NAT_RULE[3]} -j ACCEPT
FWDIF_EXISTS="${FWDIF_EXISTS} ${NAT_RULE[1]}:${NAT_RULE[2]}:${NAT_RULE[3]}"
fi
;;
*) display_c RED "Invalid NAT rule in NAT_RANGE" ;;
esac
done
reset_color
fi
fi
$IPTABLES --policy INPUT ACCEPT
$IPTABLES --policy OUTPUT ACCEPT
$IPTABLES --policy FORWARD DROP
if [ -s "$BASEDIR/include/ipv4_custom_blockincoming" ]; then
display_c YELLOW "Loading custom incoming blocked rules..."
. "$BASEDIR/include/ipv4_custom_blockincoming"
fi
if [ $BLOCKINCOMING ]; then
$IPTABLES -A INPUT -p tcp --syn -j DROP
$IPTABLES -A INPUT -p udp -j DROP
fi
#================[IPv6]================
if [ $IPV6 ]; then
iptables_rules_flush ipv6
if [ -s "$BASEDIR/include/ipv6_custom_flush" ]; then
display_c YELLOW "Loading custom IPv6 flush rules..."
. "$BASEDIR/include/ipv6_custom_flush"
fi
display_c YELLOW "Adding trusted IPv6: " N
$IP6TABLES -A INPUT -i lo -j ACCEPT
$IP6TABLES -A OUTPUT -o lo -j ACCEPT
if [ -s "$BASEDIR/include/ipv6_custom_trust" ]; then
display_c YELLOW "Loading custom IPv6 trust rules..."
. "$BASEDIR/include/ipv6_custom_trust"
fi
if [ "$IPV6_TRUSTED" ]; then
for i in $IPV6_TRUSTED; do
echo -n "$i "
$IP6TABLES -A INPUT -s $i -j ACCEPT
$IP6TABLES -A OUTPUT -d $i -j ACCEPT
done
fi
reset_color
if [ -s "$BASEDIR/include/ipv6_custom_blockip" ]; then
display_c YELLOW "Loading custom ip block rules..."
. "$BASEDIR/include/ipv6_custom_blockip"
fi
if [ "$IPV6_DNS_REQUESTS_OUT" ]; then
display_c YELLOW "Adding IPv6 DNS reply allows for trusted DNS servers.."
for i in $DNS_REQUESTS_OUT; do
if [[ "$i" =~ "|" ]]; then
IFS_OLD=${IFS};IFS=\|
DNSREQ=($i)
IFS=${IFS_OLD}
SRCIF=${DNSREQ[0]}
DNSIP_NUM=${#DNSREQ[@]}
DNSIP_COUNT_CURR=1
for ((i=$DNSIP_COUNT_CURR; i <= $DNSIP_NUM; i++)); do
if [ ${DNSREQ[$i]} ]; then
${IP6TABLES} -A INPUT -i ${SRCIF} -p udp --sport 53 -s ${DNSREQ[$i]} --destination-port 1024:65535 -j ACCEPT
fi
done
else
${IP6TABLES} -A INPUT -i $i -p udp --sport 53 --destination-port 1024:65535 -j ACCEPT
fi
done
fi
if [ -s "$BASEDIR/include/ipv6_custom_blockoutports" ]; then
display_c YELLOW "Loading custom IPv6 blocked outbound port rules..."
. "$BASEDIR/include/ipv6_custom_blockoutports"
fi
if [ "$IPV6_BLOCKEDIP" ]; then
display_c YELLOW "Adding blocked IPv6 addresses... "
for i in `grep -v "\#" $IPV6_BLOCKEDIP`; do
if [[ "$i" =~ "|" ]]; then
IFS_OLD=${IFS};IFS=\|
ADVBLKIP=($i)
IFS=${IFS_OLD}
SRCIF=${ADVBLKIP[0]}
SRCIP=${ADVBLKIP[1]}
SRCPORT=${ADVBLKIP[2]}
DSTIF=${ADVBLKIP[3]}
DSTIP=${ADVBLKIP[4]}
DSTPORT=${ADVBLKIP[5]}
DIRECTION=${ADVBLKIP[6]}
PROTO=${ADVBLKIP[7]}
if [ "$SRCIF" ]; then
SRCIF="-i ${SRCIF} "
fi
if [ "$SRCIP" ]; then
SRCIP="-s ${SRCIP} "
fi
if [ "$SRCPORT" ]; then
SRCPORT="--sport ${SRCPORT/-/:} "
fi
if [ "$DSTIF" ]; then
DSTIF="-o ${DSTIF} "
fi
if [ "$DSTIP" ]; then
DSTIP="-d ${DSTIP} "
fi
if [ "$DSTPORT" ]; then
DSTPORT="--dport ${DSTPORT/-/:} "
fi
if [ "$PROTO" ]; then
case $PROTO in
TCP|tcp) PROTO="-p tcp";;
UDP|udp) PROTO="-p udp";;
*) PROTO="-p ${PROTO}";;
esac
fi
case $DIRECTION in
IN) DIRECTION="INPUT" ;;
OUT) DIRECTION="OUTPUT" ;;
FWD) DIRECTION="FORWARD" ;;
*) DIRECTION="INPUT" ;;
esac
${IP6TABLES} -A ${DIRECTION} ${PROTO} ${SRCIF} ${SRCIP} ${SRCPORT} ${DSTIF} ${DSTIP} ${DSTPORT} -j DROP
else
$IP6TABLES -A INPUT -s $i -j DROP
$IP6TABLES -A OUTPUT -d $i -j DROP
fi
done
fi
if [ -s "$BASEDIR/include/ipv6_custom_mssclamp" ]; then
display_c YELLOW "Loading custom IPv6 MSS Clamp rules..."
. "$BASEDIR/include/ipv6_custom_mssclamp"
fi
if [ "$IPV6_CLAMPMSS" ]; then
display_c YELLOW "Clamping IPV6 MSS to PMTU..."
for i in $IPV6_CLAMPMSS; do
$IP6TABLES -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
-j TCPMSS --clamp-mss-to-pmtu -o $i -m tcpmss \
--mss 1280:1536
$IP6TABLES -A OUTPUT -p tcp --tcp-flags SYN,RST SYN \
-j TCPMSS --clamp-mss-to-pmtu -o $i -m tcpmss \
--mss 1280:1536
# This is necessary to make sure that PMTU works
$IP6TABLES -A OUTPUT -p icmpv6 --icmpv6-type time-exceeded \
-o $i -j ACCEPT
$IP6TABLES -A INPUT -p icmpv6 --icmpv6-type time-exceeded \
-i $i -j ACCEPT
$IP6TABLES -A OUTPUT -p icmpv6 --icmpv6-type packet-too-big \
-o $i -j ACCEPT
$IP6TABLES -A INPUT -p icmpv6 --icmpv6-type packet-too-big \
-i $i -j ACCEPT
done
fi
if [ -s "$BASEDIR/include/ipv6_custom_allowedports" ]; then
display_c YELLOW "Loading custom IPv6 allowed port rules..."
. "$BASEDIR/include/ipv6_custom_allowedports"
fi
if [ "$IPV6_TCPPORTS" ] || [ "$IPV6_UDPPORTS" ]; then
display_c YELLOW "Adding allowed IPv6 port: " N
if [ "$IPV6_TCPPORTS" ]; then
if [ "$IPTABLES_MULTIPORT" == "yes" ] && [ "$NF_MULTIPORT_MAX_PORTS" ]; then
IPV6_TCPPORTS=($IPV6_TCPPORTS)
PORTS_COUNT=${#IPV6_TCPPORTS[@]}
PORTS_COUNT_CURR=0
while (( "$PORTS_COUNT_CURR" < "$PORTS_COUNT" )); do
for ((i=$PORTS_COUNT_CURR; i <=(($PORTS_COUNT_CURR+(($NF_MULTIPORT_MAX_PORTS-1)))); i++)); do
if [ ${IPV6_TCPPORTS[$i]} ]; then
PORTS="${PORTS},${IPV6_TCPPORTS[$i]}"
fi
done
echo -en "${PURPLE}Multiport-TCP${DEFAULT_COLOR}/${GREEN}${PORTS#,} "
$IP6TABLES -A INPUT -p tcp -m multiport --dports ${PORTS#,} -j ACCEPT
unset PORTS
PORTS_COUNT_CURR=$i
done
unset i PORTS PORTS_COUNT_CURR PORTS_COUNT
else
for i in $IPV6_TCPPORTS; do
echo -en "${PURPLE}TCP${DEFAULT_COLOR}/${GREEN}$i "
$IP6TABLES -A INPUT -p tcp --dport $i -j ACCEPT
done
fi
fi
if [ "$IPV6_UDPPORTS" ]; then
for i in $IPV6_UDPPORTS; do
echo -en "${BLUE}UDP${DEFAULT_COLOR}/${GREEN}$i "
$IP6TABLES -A OUTPUT -p udp --sport 1:65535 --dport $i -j ACCEPT
$IP6TABLES -A INPUT -p udp --dport $i --sport 1:65535 -j ACCEPT
$IP6TABLES -A INPUT -p udp --sport $i --dport 1:65535 -j ACCEPT
done
fi
reset_color
fi
fi
if [ -s "$BASEDIR/include/ipv6_custom_mark" ]; then
display_c YELLOW "Loading custom IPv6 mark rules..."
. "$BASEDIR/include/ipv6_custom_mark"
fi
if [ -r "$IPV6_MARK" ]; then
display_c YELLOW "Adding IPv6 mark: "
for i in `grep -v "\#" $IPV6_MARK`; do
MARK=( ${i//|/ } )
INIF=${MARK[0]}
INIP=${MARK[1]}
DSTIP=${MARK[2]}
IPMARK=${MARK[3]}
case $INIP in
!*) INNEG="!"
INIP=${INIP#\!};;
esac
case $DSTIP in
!*) DSTNEG="!"
DSTIP=${DSTIP#\!};;
esac
${IP6TABLES} -t mangle -A PREROUTING -i ${INIF} ${INNEG} -s ${INIP} \
${DSTNEG} -d ${DSTIP} -j MARK --set-mark=${IPMARK}
display_c DEFAULT "\t${GREEN}${INNEG}${INIF};${PURPLE}${INIP}${AQUA}->${BLUE}${DSTNEG}${DSTIP};${RED}${IPMARK}"
unset INNEG DSTNEG
done
echo -ne "\n"
fi
if [ -s "$BASEDIR/include/ipv6_custom_conntrack" ]; then
display_c YELLOW "Loading custom IPv6 conntrack rules..."
. "$BASEDIR/include/ipv6_custom_conntrack"
fi
if [ "$IPV6_CONNTRACK" ]; then
$IP6TABLES -A INPUT ${M_STATE} ${C_STATE} NEW -j ACCEPT
$IP6TABLES -A INPUT ${M_STATE} ${C_STATE} RELATED,ESTABLISHED -j ACCEPT
$IP6TABLES -A FORWARD ${M_STATE} ${C_STATE} RELATED,ESTABLISHED -j ACCEPT
#$IP6TABLES -A FORWARD ${M_STATE} ${C_STATE} NEW -j ACCEPT
$IP6TABLES -A OUTPUT ${M_STATE} ${C_STATE} RELATED,ESTABLISHED -j ACCEPT
$IP6TABLES -A OUTPUT ${M_STATE} ${C_STATE} NEW -j ACCEPT
$IP6TABLES -A INPUT ${M_STATE} ${C_STATE} INVALID -j DROP
$IP6TABLES -A OUTPUT ${M_STATE} ${C_STATE} INVALID -j DROP
$IP6TABLES -A FORWARD ${M_STATE} ${C_STATE} INVALID -j DROP
fi
if [ $IPV6_ROUTEDCLIENTBLOCK ]; then
$IP6TABLES -A FORWARD -i $IPV6_INT -o $IPV6_LAN -p tcp --syn -j DROP
$IP6TABLES -A INPUT -i $IPV6_INT -p tcp --syn -j DROP
$IP6TABLES -A INPUT -i $IPV6_INT -p udp ! --dport 32768:65535 -j DROP
$IP6TABLES -A FORWARD -i $IPV6_INT -o $IPV6_LAN -p udp ! --dport 32768:65535 -j DROP
fi
if [ -s "$BASEDIR/include/ipv6_custom_routing" ]; then
display_c YELLOW "Loading custom IPv6 routing rules..."
. "$BASEDIR/include/ipv6_custom_routing"
fi
if [ "$IPV6_FORWARDRANGE" ]; then
for i in $IPV6_FORWARDRANGE; do
$IP6TABLES -A FORWARD -s $i -j ACCEPT
$IP6TABLES -A FORWARD -d $i -j ACCEPT
done
fi
if [ -s "$BASEDIR/include/ipv6_custom_blockincoming" ]; then
display_c YELLOW "Loading custom IPv6 incoming blocked port rules..."
. "$BASEDIR/include/ipv6_custom_blockincoming"
fi
if [ $IPV6_BLOCKINCOMING ]; then
$IP6TABLES -A INPUT -p tcp --syn -j DROP
$IP6TABLES -A INPUT -p udp -j DROP
fi
if [ $TWEAKS ]; then
for i in `grep -v "\#" $TWEAKS`; do
PROCOPT=( ${i//=/ } )
echo ${PROCOPT[1]} > /proc/sys/net/${PROCOPT[0]} &>/dev/null
done
fi
if [ -x $POSTRUN ]; then
$POSTRUN
fi