mirror of
https://github.com/fwbuilder/fwbuilder
synced 2026-03-19 17:57:22 +01:00
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
529 lines
12 KiB
Bash
Executable File
529 lines
12 KiB
Bash
Executable File
#!/bin/sh
|
|
#
|
|
# This is automatically generated file. DO NOT MODIFY !
|
|
#
|
|
# Firewall Builder fwb_ipt v4.2.0.3523
|
|
#
|
|
# Generated Sun Apr 10 17:51:53 2011 PDT by vadim
|
|
#
|
|
# files: * firewall21.fw /etc/fw/firewall21.fw
|
|
#
|
|
# Compiled for iptables (any version)
|
|
#
|
|
# two dynamic interfaces in the same policy or NAT rule
|
|
|
|
# firewall21:Policy:: warning: Log prefix has been truncated to 29 characters
|
|
# firewall21:Policy:: warning: Log prefix has been truncated to 29 characters
|
|
|
|
|
|
FWBDEBUG=""
|
|
|
|
PATH="/sbin:/usr/sbin:/bin:/usr/bin:${PATH}"
|
|
export PATH
|
|
|
|
|
|
|
|
LSMOD="/sbin/lsmod"
|
|
MODPROBE="/sbin/modprobe"
|
|
IPTABLES="/sbin/iptables"
|
|
IP6TABLES="/sbin/ip6tables"
|
|
IPTABLES_RESTORE="/sbin/iptables-restore"
|
|
IP6TABLES_RESTORE="/sbin/ip6tables-restore"
|
|
IP="/sbin/ip"
|
|
IFCONFIG="/sbin/ifconfig"
|
|
VCONFIG="/sbin/vconfig"
|
|
BRCTL="/sbin/brctl"
|
|
IFENSLAVE="/sbin/ifenslave"
|
|
IPSET="/usr/sbin/ipset"
|
|
LOGGER="/usr/bin/logger"
|
|
|
|
log() {
|
|
echo "$1"
|
|
command -v "$LOGGER" >/dev/null 2>&1 && $LOGGER -p info "$1"
|
|
}
|
|
|
|
getInterfaceVarName() {
|
|
echo $1 | sed 's/\./_/'
|
|
}
|
|
|
|
getaddr_internal() {
|
|
dev=$1
|
|
name=$2
|
|
af=$3
|
|
L=$($IP $af addr show dev $dev | sed -n '/inet/{s!.*inet6* !!;s!/.*!!p}' | sed 's/peer.*//')
|
|
test -z "$L" && {
|
|
eval "$name=''"
|
|
return
|
|
}
|
|
eval "${name}_list=\"$L\""
|
|
}
|
|
|
|
getaddr() {
|
|
getaddr_internal $1 $2 "-4"
|
|
}
|
|
|
|
getaddr6() {
|
|
getaddr_internal $1 $2 "-6"
|
|
}
|
|
|
|
# function getinterfaces is used to process wildcard interfaces
|
|
getinterfaces() {
|
|
NAME=$1
|
|
$IP link show | grep ": $NAME" | while read L; do
|
|
OIFS=$IFS
|
|
IFS=" :"
|
|
set $L
|
|
IFS=$OIFS
|
|
echo $2
|
|
done
|
|
}
|
|
|
|
diff_intf() {
|
|
func=$1
|
|
list1=$2
|
|
list2=$3
|
|
cmd=$4
|
|
for intf in $list1
|
|
do
|
|
echo $list2 | grep -q $intf || {
|
|
# $vlan is absent in list 2
|
|
$func $intf $cmd
|
|
}
|
|
done
|
|
}
|
|
|
|
find_program() {
|
|
PGM=$1
|
|
command -v $PGM >/dev/null 2>&1 || {
|
|
echo "$PGM not found"
|
|
exit 1
|
|
}
|
|
}
|
|
check_tools() {
|
|
find_program $IPTABLES
|
|
find_program $IP
|
|
}
|
|
reset_iptables_v4() {
|
|
$IPTABLES -P OUTPUT DROP
|
|
$IPTABLES -P INPUT DROP
|
|
$IPTABLES -P FORWARD DROP
|
|
|
|
cat /proc/net/ip_tables_names | while read table; do
|
|
$IPTABLES -t $table -L -n | while read c chain rest; do
|
|
if test "X$c" = "XChain" ; then
|
|
$IPTABLES -t $table -F $chain
|
|
fi
|
|
done
|
|
$IPTABLES -t $table -X
|
|
done
|
|
}
|
|
|
|
reset_iptables_v6() {
|
|
$IP6TABLES -P OUTPUT DROP
|
|
$IP6TABLES -P INPUT DROP
|
|
$IP6TABLES -P FORWARD DROP
|
|
|
|
cat /proc/net/ip6_tables_names | while read table; do
|
|
$IP6TABLES -t $table -L -n | while read c chain rest; do
|
|
if test "X$c" = "XChain" ; then
|
|
$IP6TABLES -t $table -F $chain
|
|
fi
|
|
done
|
|
$IP6TABLES -t $table -X
|
|
done
|
|
}
|
|
|
|
|
|
P2P_INTERFACE_WARNING=""
|
|
|
|
missing_address() {
|
|
address=$1
|
|
cmd=$2
|
|
|
|
oldIFS=$IFS
|
|
IFS="@"
|
|
set $address
|
|
addr=$1
|
|
interface=$2
|
|
IFS=$oldIFS
|
|
|
|
|
|
|
|
$IP addr show dev $interface | grep -q POINTOPOINT && {
|
|
test -z "$P2P_INTERFACE_WARNING" && echo "Warning: Can not update address of interface $interface. fwbuilder can not manage addresses of point-to-point interfaces yet"
|
|
P2P_INTERFACE_WARNING="yes"
|
|
return
|
|
}
|
|
|
|
test "$cmd" = "add" && {
|
|
echo "# Adding ip address: $interface $addr"
|
|
echo $addr | grep -q ':' && {
|
|
$FWBDEBUG $IP addr $cmd $addr dev $interface
|
|
} || {
|
|
$FWBDEBUG $IP addr $cmd $addr broadcast + dev $interface
|
|
}
|
|
}
|
|
|
|
test "$cmd" = "del" && {
|
|
echo "# Removing ip address: $interface $addr"
|
|
$FWBDEBUG $IP addr $cmd $addr dev $interface || exit 1
|
|
}
|
|
|
|
$FWBDEBUG $IP link set $interface up
|
|
}
|
|
|
|
list_addresses_by_scope() {
|
|
interface=$1
|
|
scope=$2
|
|
ignore_list=$3
|
|
$IP addr ls dev $interface | \
|
|
awk -v IGNORED="$ignore_list" -v SCOPE="$scope" \
|
|
'BEGIN {
|
|
split(IGNORED,ignored_arr);
|
|
for (a in ignored_arr) {ignored_dict[ignored_arr[a]]=1;}
|
|
}
|
|
(/inet |inet6 / && $0 ~ SCOPE && !($2 in ignored_dict)) {print $2;}' | \
|
|
while read addr; do
|
|
echo "${addr}@$interface"
|
|
done | sort
|
|
}
|
|
|
|
|
|
update_addresses_of_interface() {
|
|
ignore_list=$2
|
|
set $1
|
|
interface=$1
|
|
shift
|
|
|
|
FWB_ADDRS=$(
|
|
for addr in $*; do
|
|
echo "${addr}@$interface"
|
|
done | sort
|
|
)
|
|
|
|
CURRENT_ADDRS_ALL_SCOPES=""
|
|
CURRENT_ADDRS_GLOBAL_SCOPE=""
|
|
|
|
$IP link show dev $interface >/dev/null 2>&1 && {
|
|
CURRENT_ADDRS_ALL_SCOPES=$(list_addresses_by_scope $interface 'scope .*' "$ignore_list")
|
|
CURRENT_ADDRS_GLOBAL_SCOPE=$(list_addresses_by_scope $interface 'scope global' "$ignore_list")
|
|
} || {
|
|
echo "# Interface $interface does not exist"
|
|
# Stop the script if we are not in test mode
|
|
test -z "$FWBDEBUG" && exit 1
|
|
}
|
|
|
|
diff_intf missing_address "$FWB_ADDRS" "$CURRENT_ADDRS_ALL_SCOPES" add
|
|
diff_intf missing_address "$CURRENT_ADDRS_GLOBAL_SCOPE" "$FWB_ADDRS" del
|
|
}
|
|
|
|
clear_addresses_except_known_interfaces() {
|
|
$IP link show | sed 's/://g' | awk -v IGNORED="$*" \
|
|
'BEGIN {
|
|
split(IGNORED,ignored_arr);
|
|
for (a in ignored_arr) {ignored_dict[ignored_arr[a]]=1;}
|
|
}
|
|
(/state/ && !($2 in ignored_dict)) {print $2;}' | \
|
|
while read intf; do
|
|
echo "# Removing addresses not configured in fwbuilder from interface $intf"
|
|
$FWBDEBUG $IP addr flush dev $intf scope global
|
|
$FWBDEBUG $IP link set $intf down
|
|
done
|
|
}
|
|
|
|
check_file() {
|
|
test -r "$2" || {
|
|
echo "Can not find file $2 referenced by address table object $1"
|
|
exit 1
|
|
}
|
|
}
|
|
|
|
check_run_time_address_table_files() {
|
|
:
|
|
|
|
}
|
|
|
|
load_modules() {
|
|
:
|
|
|
|
}
|
|
|
|
verify_interfaces() {
|
|
:
|
|
|
|
}
|
|
|
|
prolog_commands() {
|
|
echo "Running prolog script"
|
|
|
|
}
|
|
|
|
epilog_commands() {
|
|
echo "Running epilog script"
|
|
|
|
}
|
|
|
|
run_epilog_and_exit() {
|
|
epilog_commands
|
|
exit $1
|
|
}
|
|
|
|
configure_interfaces() {
|
|
:
|
|
# Configure interfaces
|
|
update_addresses_of_interface "lo 127.0.0.1/8" ""
|
|
update_addresses_of_interface "eth2 192.168.1.100/24" ""
|
|
getaddr eth0 i_eth0
|
|
getaddr6 eth0 i_eth0_v6
|
|
getaddr eth1 i_eth1
|
|
getaddr6 eth1 i_eth1_v6
|
|
}
|
|
|
|
script_body() {
|
|
echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout
|
|
echo 1800 > /proc/sys/net/ipv4/tcp_keepalive_intvl
|
|
|
|
|
|
# ================ IPv4
|
|
|
|
|
|
# ================ Table 'filter', automatic rules
|
|
# accept established sessions
|
|
$IPTABLES -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
|
|
$IPTABLES -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
|
|
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
|
|
|
|
|
|
# ================ Table 'nat', rule set NAT
|
|
#
|
|
# Rule 0 (NAT)
|
|
#
|
|
echo "Rule 0 (NAT)"
|
|
#
|
|
for i_eth0 in $i_eth0_list
|
|
do
|
|
test -n "$i_eth0" && $IPTABLES -t nat -A PREROUTING -d $i_eth0 -j DNAT --to-destination 192.168.1.10
|
|
done
|
|
for i_eth1 in $i_eth1_list
|
|
do
|
|
test -n "$i_eth1" && $IPTABLES -t nat -A PREROUTING -d $i_eth1 -j DNAT --to-destination 192.168.1.10
|
|
done
|
|
#
|
|
# Rule 1 (NAT)
|
|
#
|
|
echo "Rule 1 (NAT)"
|
|
#
|
|
for i_eth0 in $i_eth0_list
|
|
do
|
|
test -n "$i_eth0" && $IPTABLES -t nat -A PREROUTING -d $i_eth0 -j DNAT --to-destination 192.168.1.10 --random
|
|
done
|
|
for i_eth1 in $i_eth1_list
|
|
do
|
|
test -n "$i_eth1" && $IPTABLES -t nat -A PREROUTING -d $i_eth1 -j DNAT --to-destination 192.168.1.10 --random
|
|
done
|
|
#
|
|
# Rule 2 (NAT)
|
|
#
|
|
echo "Rule 2 (NAT)"
|
|
#
|
|
$IPTABLES -t nat -A POSTROUTING -o eth0 -s 192.168.1.0/24 -j MASQUERADE
|
|
#
|
|
# Rule 3 (NAT)
|
|
#
|
|
echo "Rule 3 (NAT)"
|
|
#
|
|
$IPTABLES -t nat -A POSTROUTING -o eth0 -s 192.168.1.0/24 -j MASQUERADE --random
|
|
#
|
|
# Rule 4 (NAT)
|
|
#
|
|
echo "Rule 4 (NAT)"
|
|
#
|
|
for i_eth0 in $i_eth0_list
|
|
do
|
|
test -n "$i_eth0" && $IPTABLES -t nat -A POSTROUTING -o eth0 -s 192.168.1.0/24 -j SNAT --to-source $i_eth0
|
|
done
|
|
#
|
|
# Rule 5 (NAT)
|
|
#
|
|
echo "Rule 5 (NAT)"
|
|
#
|
|
for i_eth0 in $i_eth0_list
|
|
do
|
|
test -n "$i_eth0" && $IPTABLES -t nat -A POSTROUTING -o eth0 -s 192.168.1.0/24 -j SNAT --to-source $i_eth0 --random
|
|
done
|
|
|
|
|
|
|
|
# ================ Table 'filter', rule set Policy
|
|
#
|
|
# Rule 0 (eth0)
|
|
#
|
|
echo "Rule 0 (eth0)"
|
|
#
|
|
for i_eth0 in $i_eth0_list
|
|
do
|
|
test -n "$i_eth0" && $IPTABLES -A OUTPUT -o eth0 -s $i_eth0 -m state --state NEW -j ACCEPT
|
|
done
|
|
#
|
|
# Rule 1 (global)
|
|
#
|
|
echo "Rule 1 (global)"
|
|
#
|
|
for i_eth0 in $i_eth0_list
|
|
do
|
|
test -n "$i_eth0" && $IPTABLES -A INPUT -s $i_eth0 -m state --state NEW -j ACCEPT
|
|
done
|
|
for i_eth1 in $i_eth1_list
|
|
do
|
|
test -n "$i_eth1" && $IPTABLES -A INPUT -s $i_eth1 -m state --state NEW -j ACCEPT
|
|
done
|
|
$IPTABLES -A INPUT -s 192.168.1.0/24 -m state --state NEW -j ACCEPT
|
|
for i_eth0 in $i_eth0_list
|
|
do
|
|
test -n "$i_eth0" && $IPTABLES -A OUTPUT -s $i_eth0 -m state --state NEW -j ACCEPT
|
|
done
|
|
for i_eth1 in $i_eth1_list
|
|
do
|
|
test -n "$i_eth1" && $IPTABLES -A OUTPUT -s $i_eth1 -m state --state NEW -j ACCEPT
|
|
done
|
|
$IPTABLES -A OUTPUT -s 192.168.1.0/24 -m state --state NEW -j ACCEPT
|
|
$IPTABLES -A FORWARD -s 192.168.1.0/24 -m state --state NEW -j ACCEPT
|
|
#
|
|
# Rule 2 (global)
|
|
#
|
|
echo "Rule 2 (global)"
|
|
#
|
|
$IPTABLES -A OUTPUT -p udp -m udp -m multiport -d 255.255.255.255 --dports 68,67 -m state --state NEW -j ACCEPT
|
|
for i_eth0 in $i_eth0_list
|
|
do
|
|
test -n "$i_eth0" && $IPTABLES -A OUTPUT -p udp -m udp -m multiport -d $i_eth0 --dports 68,67 -m state --state NEW -j ACCEPT
|
|
done
|
|
$IPTABLES -A INPUT -p udp -m udp -m multiport -d 255.255.255.255 --dports 68,67 -m state --state NEW -j ACCEPT
|
|
for i_eth0 in $i_eth0_list
|
|
do
|
|
test -n "$i_eth0" && $IPTABLES -A INPUT -p udp -m udp -m multiport -d $i_eth0 --dports 68,67 -m state --state NEW -j ACCEPT
|
|
done
|
|
#
|
|
# Rule 3 (global)
|
|
#
|
|
echo "Rule 3 (global)"
|
|
#
|
|
$IPTABLES -N RULE_3
|
|
$IPTABLES -A OUTPUT -j RULE_3
|
|
$IPTABLES -A INPUT -j RULE_3
|
|
$IPTABLES -A FORWARD -j RULE_3
|
|
$IPTABLES -A RULE_3 -j LOG --log-level debug --log-prefix "RULE 3 -- DENY on interface g"
|
|
$IPTABLES -A RULE_3 -j DROP
|
|
}
|
|
|
|
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 "$cmd" in
|
|
start)
|
|
log "Activating firewall script generated Sun Apr 10 17:51:53 2011 by vadim"
|
|
check_tools
|
|
prolog_commands
|
|
check_run_time_address_table_files
|
|
|
|
load_modules "nat "
|
|
configure_interfaces
|
|
verify_interfaces
|
|
|
|
reset_all
|
|
|
|
script_body
|
|
ip_forward
|
|
epilog_commands
|
|
RETVAL=$?
|
|
;;
|
|
|
|
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 |