mirror of
https://github.com/fwbuilder/fwbuilder
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f366e2dc66
3178186 "Add ND/NS allow rules for the FORWARD chain". Rules that are added automatically to ipv6 Linux firewall to permit neighbor discovery packets should be also added to the FORWARD chain if the firewall is a bridge. see #2323
606 lines
17 KiB
Bash
Executable File
606 lines
17 KiB
Bash
Executable File
#!/bin/sh
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#
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# This is automatically generated file. DO NOT MODIFY !
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#
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# Firewall Builder fwb_ipt v4.2.0.3523
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#
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# Generated Sun Apr 10 17:52:10 2011 PDT by vadim
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#
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# files: * firewall27.fw /etc/fw/firewall27.fw
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#
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# Compiled for iptables 1.4.0
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#
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# this firewall uses iptables-restore format
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# all interfaces have static addresses, script pipes iptables commands straight to iptables-restore
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# firewall27::: warning: Can not add virtual address for object address
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# firewall27::: warning: Can not add virtual address for object address
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FWBDEBUG=""
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PATH="/sbin:/usr/sbin:/bin:/usr/bin:${PATH}"
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export PATH
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LSMOD="/sbin/lsmod"
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MODPROBE="/sbin/modprobe"
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IPTABLES="/sbin/iptables"
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IP6TABLES="/sbin/ip6tables"
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IPTABLES_RESTORE="/sbin/iptables-restore"
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IP6TABLES_RESTORE="/sbin/ip6tables-restore"
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IP="/sbin/ip"
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IFCONFIG="/sbin/ifconfig"
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VCONFIG="/sbin/vconfig"
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BRCTL="/sbin/brctl"
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IFENSLAVE="/sbin/ifenslave"
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IPSET="/usr/sbin/ipset"
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LOGGER="/usr/bin/logger"
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log() {
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echo "$1"
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command -v "$LOGGER" >/dev/null 2>&1 && $LOGGER -p info "$1"
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}
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getInterfaceVarName() {
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echo $1 | sed 's/\./_/'
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}
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getaddr_internal() {
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dev=$1
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name=$2
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af=$3
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L=$($IP $af addr show dev $dev | sed -n '/inet/{s!.*inet6* !!;s!/.*!!p}' | sed 's/peer.*//')
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test -z "$L" && {
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eval "$name=''"
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return
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}
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eval "${name}_list=\"$L\""
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}
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getaddr() {
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getaddr_internal $1 $2 "-4"
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}
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getaddr6() {
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getaddr_internal $1 $2 "-6"
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}
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# function getinterfaces is used to process wildcard interfaces
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getinterfaces() {
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NAME=$1
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$IP link show | grep ": $NAME" | while read L; do
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OIFS=$IFS
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IFS=" :"
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set $L
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IFS=$OIFS
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echo $2
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done
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}
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diff_intf() {
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func=$1
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list1=$2
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list2=$3
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cmd=$4
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for intf in $list1
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do
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echo $list2 | grep -q $intf || {
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# $vlan is absent in list 2
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$func $intf $cmd
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}
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done
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}
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find_program() {
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PGM=$1
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command -v $PGM >/dev/null 2>&1 || {
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echo "$PGM not found"
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exit 1
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}
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}
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check_tools() {
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find_program $IPTABLES
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find_program $IPTABLES_RESTORE
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find_program $IP
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}
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reset_iptables_v4() {
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$IPTABLES -P OUTPUT DROP
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$IPTABLES -P INPUT DROP
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$IPTABLES -P FORWARD DROP
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cat /proc/net/ip_tables_names | while read table; do
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$IPTABLES -t $table -L -n | while read c chain rest; do
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if test "X$c" = "XChain" ; then
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$IPTABLES -t $table -F $chain
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fi
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done
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$IPTABLES -t $table -X
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done
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}
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reset_iptables_v6() {
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$IP6TABLES -P OUTPUT DROP
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$IP6TABLES -P INPUT DROP
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$IP6TABLES -P FORWARD DROP
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cat /proc/net/ip6_tables_names | while read table; do
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$IP6TABLES -t $table -L -n | while read c chain rest; do
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if test "X$c" = "XChain" ; then
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$IP6TABLES -t $table -F $chain
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fi
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done
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$IP6TABLES -t $table -X
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done
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}
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P2P_INTERFACE_WARNING=""
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missing_address() {
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address=$1
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cmd=$2
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oldIFS=$IFS
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IFS="@"
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set $address
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addr=$1
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interface=$2
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IFS=$oldIFS
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$IP addr show dev $interface | grep -q POINTOPOINT && {
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test -z "$P2P_INTERFACE_WARNING" && echo "Warning: Can not update address of interface $interface. fwbuilder can not manage addresses of point-to-point interfaces yet"
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P2P_INTERFACE_WARNING="yes"
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return
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}
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test "$cmd" = "add" && {
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echo "# Adding ip address: $interface $addr"
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echo $addr | grep -q ':' && {
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$FWBDEBUG $IP addr $cmd $addr dev $interface
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} || {
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$FWBDEBUG $IP addr $cmd $addr broadcast + dev $interface
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}
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}
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test "$cmd" = "del" && {
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echo "# Removing ip address: $interface $addr"
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$FWBDEBUG $IP addr $cmd $addr dev $interface || exit 1
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}
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$FWBDEBUG $IP link set $interface up
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}
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list_addresses_by_scope() {
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interface=$1
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scope=$2
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ignore_list=$3
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$IP addr ls dev $interface | \
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awk -v IGNORED="$ignore_list" -v SCOPE="$scope" \
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'BEGIN {
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split(IGNORED,ignored_arr);
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for (a in ignored_arr) {ignored_dict[ignored_arr[a]]=1;}
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}
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(/inet |inet6 / && $0 ~ SCOPE && !($2 in ignored_dict)) {print $2;}' | \
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while read addr; do
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echo "${addr}@$interface"
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done | sort
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}
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update_addresses_of_interface() {
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ignore_list=$2
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set $1
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interface=$1
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shift
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FWB_ADDRS=$(
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for addr in $*; do
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echo "${addr}@$interface"
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done | sort
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)
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CURRENT_ADDRS_ALL_SCOPES=""
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CURRENT_ADDRS_GLOBAL_SCOPE=""
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$IP link show dev $interface >/dev/null 2>&1 && {
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CURRENT_ADDRS_ALL_SCOPES=$(list_addresses_by_scope $interface 'scope .*' "$ignore_list")
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CURRENT_ADDRS_GLOBAL_SCOPE=$(list_addresses_by_scope $interface 'scope global' "$ignore_list")
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} || {
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echo "# Interface $interface does not exist"
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# Stop the script if we are not in test mode
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test -z "$FWBDEBUG" && exit 1
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}
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diff_intf missing_address "$FWB_ADDRS" "$CURRENT_ADDRS_ALL_SCOPES" add
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diff_intf missing_address "$CURRENT_ADDRS_GLOBAL_SCOPE" "$FWB_ADDRS" del
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}
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clear_addresses_except_known_interfaces() {
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$IP link show | sed 's/://g' | awk -v IGNORED="$*" \
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'BEGIN {
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split(IGNORED,ignored_arr);
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for (a in ignored_arr) {ignored_dict[ignored_arr[a]]=1;}
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}
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(/state/ && !($2 in ignored_dict)) {print $2;}' | \
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while read intf; do
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echo "# Removing addresses not configured in fwbuilder from interface $intf"
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$FWBDEBUG $IP addr flush dev $intf scope global
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$FWBDEBUG $IP link set $intf down
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done
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}
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check_file() {
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test -r "$2" || {
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echo "Can not find file $2 referenced by address table object $1"
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exit 1
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}
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}
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check_run_time_address_table_files() {
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:
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}
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load_modules() {
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:
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}
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verify_interfaces() {
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:
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echo "Verifying interfaces: ppp eth0 eth2"
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for i in ppp eth0 eth2 ; do
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$IP link show "$i" > /dev/null 2>&1 || {
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log "Interface $i does not exist"
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exit 1
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}
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done
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}
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prolog_commands() {
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echo "Running prolog script"
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}
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epilog_commands() {
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echo "Running epilog script"
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}
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run_epilog_and_exit() {
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epilog_commands
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exit $1
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}
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configure_interfaces() {
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:
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# Configure interfaces
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update_addresses_of_interface "ppp 192.0.2.1/24" ""
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update_addresses_of_interface "eth0 192.168.1.1/24" ""
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update_addresses_of_interface "eth2 192.168.2.1/24" ""
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}
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script_body() {
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echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout
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echo 1800 > /proc/sys/net/ipv4/tcp_keepalive_intvl
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# ================ IPv4
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(
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echo '*filter'
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# ================ Table 'filter', automatic rules
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echo :INPUT DROP [0:0]
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echo :FORWARD DROP [0:0]
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echo :OUTPUT DROP [0:0]
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# accept established sessions
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echo "-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT "
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echo "-A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT "
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echo "-A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT "
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# backup ssh access
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echo "-A INPUT -p tcp -m tcp -s 192.168.1.1/255.255.255.255 --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT "
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echo "-A OUTPUT -p tcp -m tcp -d 192.168.1.1/255.255.255.255 --sport 22 -m state --state ESTABLISHED,RELATED -j ACCEPT "
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# drop TCP sessions opened prior firewall restart
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echo "-A INPUT -p tcp -m tcp ! --tcp-flags SYN,RST,ACK SYN -m state --state NEW -j DROP "
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echo "-A OUTPUT -p tcp -m tcp ! --tcp-flags SYN,RST,ACK SYN -m state --state NEW -j DROP "
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echo "-A FORWARD -p tcp -m tcp ! --tcp-flags SYN,RST,ACK SYN -m state --state NEW -j DROP "
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# drop packets that do not match any valid state
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echo "-A OUTPUT -m state --state INVALID -j DROP "
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echo "-A INPUT -m state --state INVALID -j DROP "
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echo "-A FORWARD -m state --state INVALID -j DROP "
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# ================ Table 'filter', rule set Policy
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#
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# Rule 0 (ppp)
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# ppp clients get addresses on 10.1.1.0
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echo ":In_RULE_0 - [0:0]"
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echo "-A INPUT -i ppp -s ! 10.1.1.0/24 -j In_RULE_0 "
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echo "-A FORWARD -i ppp -s ! 10.1.1.0/24 -j In_RULE_0 "
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echo "-A In_RULE_0 -j LOG "
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echo "-A In_RULE_0 -j DROP "
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#
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# Rule 1 (ppp)
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# ppp clients can not connect to the firewall
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echo ":In_RULE_1 - [0:0]"
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echo "-A INPUT -i ppp -d 192.0.2.1 -j In_RULE_1 "
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echo "-A In_RULE_1 -j LOG "
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echo "-A In_RULE_1 -j DROP "
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#
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# Rule 2 (ppp)
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echo ":In_RULE_2 - [0:0]"
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echo "-A INPUT -i ppp -j In_RULE_2 "
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echo "-A In_RULE_2 -j LOG "
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echo "-A In_RULE_2 -j DROP "
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#
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# Rule 3 (ppp)
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# ppp clients can only connect to the mail
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# server and web proxy on DMZ
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echo "-A FORWARD -i ppp -p tcp -m tcp -m multiport -d 192.168.2.10 --dports 25,3128 -m state --state NEW -j ACCEPT "
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#
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# Rule 4 (ppp)
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# ppp clients can not connect to
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# anything else on DMZ and
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# internal net
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echo ":In_RULE_4 - [0:0]"
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echo "-A INPUT -i ppp -d 192.168.1.0/24 -j In_RULE_4 "
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echo "-A INPUT -i ppp -d 192.168.2.0/24 -j In_RULE_4 "
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echo "-A FORWARD -i ppp -d 192.168.1.0/24 -j In_RULE_4 "
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echo "-A FORWARD -i ppp -d 192.168.2.0/24 -j In_RULE_4 "
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echo "-A In_RULE_4 -j LOG "
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echo "-A In_RULE_4 -j DROP "
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#
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# Rule 5 (eth2)
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echo ":In_RULE_5 - [0:0]"
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echo "-A INPUT -i eth2 -s ! 192.168.2.0/24 -j In_RULE_5 "
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echo "-A FORWARD -i eth2 -s ! 192.168.2.0/24 -j In_RULE_5 "
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echo "-A In_RULE_5 -j LOG "
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echo "-A In_RULE_5 -j DROP "
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#
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# Rule 6 (global)
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# hostF has the same IP address as firewal.
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echo ":RULE_6 - [0:0]"
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echo "-A OUTPUT -p icmp -m icmp -d 192.168.1.1 --icmp-type 8/0 -m state --state NEW -j RULE_6 "
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echo "-A INPUT -p icmp -m icmp -d 192.168.1.1 --icmp-type 8/0 -m state --state NEW -j RULE_6 "
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echo "-A RULE_6 -j LOG "
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echo "-A RULE_6 -j ACCEPT "
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#
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# Rule 7 (global)
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echo ":Cid4183D051.0 - [0:0]"
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echo "-A OUTPUT -p tcp -m tcp --dport 22 -m state --state NEW -j Cid4183D051.0 "
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echo "-A Cid4183D051.0 -d 192.0.2.1 -j ACCEPT "
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echo "-A Cid4183D051.0 -d 192.168.1.1 -j ACCEPT "
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echo "-A Cid4183D051.0 -d 192.168.2.1 -j ACCEPT "
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echo "-A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -j ACCEPT "
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#
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# Rule 8 (global)
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echo "-A OUTPUT -p tcp -m tcp -d 192.0.2.1 --dport 22 -m state --state NEW -j ACCEPT "
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echo "-A INPUT -p tcp -m tcp -d 192.0.2.1 --dport 22 -m state --state NEW -j ACCEPT "
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#
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# Rule 9 (global)
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echo "-A OUTPUT -p tcp -m tcp -d 192.168.1.1 --dport 22 -m state --state NEW -j ACCEPT "
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echo "-A INPUT -p tcp -m tcp -d 192.168.1.1 --dport 22 -m state --state NEW -j ACCEPT "
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#
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# Rule 10 (global)
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echo "-A OUTPUT -p tcp -m tcp -m multiport -d 192.168.1.1 --dports 22,23 -m state --state NEW -j ACCEPT "
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echo "-A INPUT -p tcp -m tcp -m multiport -d 192.168.1.1 --dports 22,23 -m state --state NEW -j ACCEPT "
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#
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# Rule 11 (global)
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echo ":Cid4183D07A.0 - [0:0]"
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echo "-A OUTPUT -p tcp -m tcp -m multiport --dports 22,23 -m state --state NEW -j Cid4183D07A.0 "
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echo "-A Cid4183D07A.0 -d 192.168.1.1 -j ACCEPT "
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echo "-A Cid4183D07A.0 -d 192.168.2.1 -j ACCEPT "
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echo ":Cid4183D07A.1 - [0:0]"
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echo "-A INPUT -p tcp -m tcp -m multiport --dports 22,23 -m state --state NEW -j Cid4183D07A.1 "
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echo "-A Cid4183D07A.1 -d 192.168.1.1 -j ACCEPT "
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echo "-A Cid4183D07A.1 -d 192.168.2.1 -j ACCEPT "
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#
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# Rule 12 (global)
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echo ":Cid4183D085.0 - [0:0]"
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echo "-A OUTPUT -p tcp -m tcp -m multiport --dports 22,23 -m state --state NEW -j Cid4183D085.0 "
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echo ":RULE_12 - [0:0]"
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echo "-A Cid4183D085.0 -d 192.168.1.1 -j RULE_12 "
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echo "-A Cid4183D085.0 -d 192.168.2.1 -j RULE_12 "
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echo ":Cid4183D085.1 - [0:0]"
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echo "-A INPUT -p tcp -m tcp -m multiport --dports 22,23 -m state --state NEW -j Cid4183D085.1 "
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echo "-A Cid4183D085.1 -d 192.168.1.1 -j RULE_12 "
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echo "-A Cid4183D085.1 -d 192.168.2.1 -j RULE_12 "
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echo "-A RULE_12 -j LOG "
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echo "-A RULE_12 -j ACCEPT "
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#
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# Rule 13 (global)
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# firewall is part of Any, so compiler should
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# generate code in both FORWARD and
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# OUTPUT chains
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echo "-A OUTPUT -d 200.200.200.200 -m state --state NEW -j ACCEPT "
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echo "-A FORWARD -d 200.200.200.200 -m state --state NEW -j ACCEPT "
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#
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# Rule 14 (global)
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# firewall is part of Any, compiler should
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# generate code for both FORWARD and
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# INPUT chains
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echo "-A INPUT -s 200.200.200.200 -m state --state NEW -j ACCEPT "
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echo "-A FORWARD -s 200.200.200.200 -m state --state NEW -j ACCEPT "
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#
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# Rule 15 (global)
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# because firewall has interface on network
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# internal_net, compiler should generate code
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# for both FORWARD and INPUT chains
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echo "-A INPUT -s 192.168.1.10 -d 192.168.1.0/24 -m state --state NEW -j ACCEPT "
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echo "-A FORWARD -s 192.168.1.10 -d 192.168.1.0/24 -m state --state NEW -j ACCEPT "
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#
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# Rule 16 (global)
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echo ":Cid4183D0AE.0 - [0:0]"
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echo "-A OUTPUT -d 200.200.200.200 -m state --state NEW -j Cid4183D0AE.0 "
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echo "-A Cid4183D0AE.0 -s 192.168.1.0/24 -j ACCEPT "
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echo "-A Cid4183D0AE.0 -s 192.168.2.0/24 -j ACCEPT "
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echo ":Cid4183D0AE.1 - [0:0]"
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echo "-A FORWARD -d 200.200.200.200 -m state --state NEW -j Cid4183D0AE.1 "
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echo "-A Cid4183D0AE.1 -s 192.168.1.0/24 -j ACCEPT "
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echo "-A Cid4183D0AE.1 -s 192.168.2.0/24 -j ACCEPT "
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#
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# Rule 17 (global)
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# Automatically generated 'catch all' rule
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echo ":RULE_17 - [0:0]"
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echo "-A OUTPUT -j RULE_17 "
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echo "-A INPUT -j RULE_17 "
|
|
echo "-A FORWARD -j RULE_17 "
|
|
echo "-A RULE_17 -j LOG "
|
|
echo "-A RULE_17 -j DROP "
|
|
#
|
|
echo COMMIT
|
|
|
|
|
|
echo '*mangle'
|
|
# ================ Table 'mangle', automatic rules
|
|
echo "-A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu"
|
|
|
|
echo COMMIT
|
|
|
|
|
|
echo '*nat'
|
|
# ================ Table 'nat', rule set NAT
|
|
echo :PREROUTING ACCEPT [0:0]
|
|
echo :POSTROUTING ACCEPT [0:0]
|
|
echo :OUTPUT ACCEPT [0:0]
|
|
#
|
|
# Rule 0 (NAT)
|
|
echo "-A POSTROUTING -o ppp -s 192.168.1.0/24 -j SNAT --to-source 192.0.2.1 "
|
|
echo "-A POSTROUTING -o eth2 -s 192.168.1.0/24 -j SNAT --to-source 192.168.2.1 "
|
|
#
|
|
# Rule 1 (NAT)
|
|
echo "-A POSTROUTING -o eth+ -s 192.168.1.0/24 -j SNAT --to-source 22.22.22.23 "
|
|
echo "-A POSTROUTING -o ppp -s 192.168.1.0/24 -j SNAT --to-source 22.22.22.23 "
|
|
#
|
|
# Rule 2 (NAT)
|
|
echo "-A PREROUTING -p tcp -m tcp -d 192.0.2.1 --dport 22 -j DNAT --to-destination 192.168.1.10:22 "
|
|
echo "-A PREROUTING -p tcp -m tcp -d 192.168.1.1 --dport 22 -j DNAT --to-destination 192.168.1.10:22 "
|
|
echo "-A PREROUTING -p tcp -m tcp -d 192.168.2.1 --dport 22 -j DNAT --to-destination 192.168.1.10:22 "
|
|
#
|
|
# Rule 3 (NAT)
|
|
echo "-A PREROUTING -s 192.168.1.0/24 -d ! 200.200.200.200 -j DNAT --to-destination 192.168.2.10 "
|
|
echo "-A POSTROUTING -o eth2 -s 192.168.1.0/24 -d 192.168.2.10 -j SNAT --to-source 192.168.2.1 "
|
|
#
|
|
echo COMMIT
|
|
|
|
|
|
) | $IPTABLES_RESTORE; IPTABLES_RESTORE_RES=$?
|
|
test $IPTABLES_RESTORE_RES != 0 && run_epilog_and_exit $IPTABLES_RESTORE_RES
|
|
}
|
|
|
|
ip_forward() {
|
|
:
|
|
|
|
}
|
|
|
|
reset_all() {
|
|
:
|
|
reset_iptables_v4
|
|
}
|
|
|
|
block_action() {
|
|
reset_all
|
|
}
|
|
|
|
stop_action() {
|
|
reset_all
|
|
$IPTABLES -P OUTPUT ACCEPT
|
|
$IPTABLES -P INPUT ACCEPT
|
|
$IPTABLES -P FORWARD ACCEPT
|
|
}
|
|
|
|
check_iptables() {
|
|
IP_TABLES="$1"
|
|
[ ! -e $IP_TABLES ] && return 151
|
|
NF_TABLES=$(cat $IP_TABLES 2>/dev/null)
|
|
[ -z "$NF_TABLES" ] && return 152
|
|
return 0
|
|
}
|
|
status_action() {
|
|
check_iptables "/proc/net/ip_tables_names"
|
|
ret_ipv4=$?
|
|
check_iptables "/proc/net/ip6_tables_names"
|
|
ret_ipv6=$?
|
|
[ $ret_ipv4 -eq 0 -o $ret_ipv6 -eq 0 ] && return 0
|
|
[ $ret_ipv4 -eq 151 -o $ret_ipv6 -eq 151 ] && {
|
|
echo "iptables modules are not loaded"
|
|
}
|
|
[ $ret_ipv4 -eq 152 -o $ret_ipv6 -eq 152 ] && {
|
|
echo "Firewall is not configured"
|
|
}
|
|
exit 3
|
|
}
|
|
|
|
# See how we were called.
|
|
# For backwards compatibility missing argument is equivalent to 'start'
|
|
|
|
cmd=$1
|
|
test -z "$cmd" && {
|
|
cmd="start"
|
|
}
|
|
|
|
case "$cmd" in
|
|
start)
|
|
log "Activating firewall script generated Sun Apr 10 17:52:10 2011 by vadim"
|
|
check_tools
|
|
prolog_commands
|
|
check_run_time_address_table_files
|
|
|
|
load_modules "nat "
|
|
configure_interfaces
|
|
verify_interfaces
|
|
|
|
|
|
|
|
script_body
|
|
ip_forward
|
|
epilog_commands
|
|
RETVAL=$?
|
|
;;
|
|
|
|
stop)
|
|
stop_action
|
|
RETVAL=$?
|
|
;;
|
|
|
|
status)
|
|
status_action
|
|
RETVAL=$?
|
|
;;
|
|
|
|
block)
|
|
block_action
|
|
RETVAL=$?
|
|
;;
|
|
|
|
reload)
|
|
$0 stop
|
|
$0 start
|
|
RETVAL=$?
|
|
;;
|
|
|
|
interfaces)
|
|
configure_interfaces
|
|
RETVAL=$?
|
|
;;
|
|
|
|
test_interfaces)
|
|
FWBDEBUG="echo"
|
|
configure_interfaces
|
|
RETVAL=$?
|
|
;;
|
|
|
|
|
|
|
|
*)
|
|
echo "Usage $0 [start|stop|status|block|reload|interfaces|test_interfaces]"
|
|
;;
|
|
|
|
esac
|
|
|
|
exit $RETVAL |