#!/bin/sh # # This is automatically generated file. DO NOT MODIFY ! # # Firewall Builder fwb_ipt v4.2.0.3498 # # Generated Tue Mar 8 18:56:16 2011 PST by vadim # # files: * firewall20.fw /etc/fw/firewall20.fw # # Compiled for iptables (any version) # # testing firewall_is_part_of_any_and_networks # also testing SNAT and DNAT rules when external interface # has dynamic address # dynamic interface ppp0 has an address object attached to it # (interface used to be static and had an address, then got # converted to dynamic but address object is still there). Compiler # should ignore this address object and issue a warning. # firewall20::: error: Dynamic interface ppp* should not have an IP address object attached to it. This IP address object will be ignored. # firewall20::: warning: Can not add virtual address for object address # firewall20::: warning: Can not add virtual address for object address 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() { : echo "Verifying interfaces: eth0 eth2" for i in eth0 eth2 ; do $IP link show "$i" > /dev/null 2>&1 || { log "Interface $i does not exist" exit 1 } done } 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 "eth0 192.168.1.1/24" "" update_addresses_of_interface "eth2 192.168.2.1/24" "" } script_body() { echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout echo 1800 > /proc/sys/net/ipv4/tcp_keepalive_intvl # ================ IPv4 # ================ Table 'nat', rule set NAT # # Rule 0 (NAT) # echo "Rule 0 (NAT)" # $IPTABLES -t nat -A POSTROUTING -o ppp+ -s 192.168.1.0/24 -j MASQUERADE $IPTABLES -t nat -A POSTROUTING -o eth2 -s 192.168.1.0/24 -j SNAT --to-source 192.168.2.1 # # Rule 1 (NAT) # echo "Rule 1 (NAT)" # $IPTABLES -t nat -A POSTROUTING -o eth+ -s 192.168.1.0/24 -j SNAT --to-source 22.22.22.23 $IPTABLES -t nat -A POSTROUTING -o ppp+ -s 192.168.1.0/24 -j SNAT --to-source 22.22.22.23 # # Rule 2 (NAT) # echo "Rule 2 (NAT)" # $IPTABLES -t nat -A POSTROUTING -o ppp+ -s 192.168.1.0/24 -j MASQUERADE # # Rule 3 (NAT) # echo "Rule 3 (NAT)" # $IPTABLES -t nat -A POSTROUTING -o ppp+ -s 192.168.1.0/24 -j MASQUERADE --random # # Rule 4 (NAT) # echo "Rule 4 (NAT)" # getinterfaces ppp | while read I; do ivar=$(getInterfaceVarName $I) getaddr $I $ivar cmd="$"${ivar}_list eval "addr_list=$cmd" for addr in $addr_list do test -n "$addr" && $IPTABLES -t nat -A POSTROUTING -o ppp+ -s 192.168.1.0/24 -j SNAT --to-source $addr done done # # Rule 5 (NAT) # echo "Rule 5 (NAT)" # getinterfaces ppp | while read I; do ivar=$(getInterfaceVarName $I) getaddr $I $ivar cmd="$"${ivar}_list eval "addr_list=$cmd" for addr in $addr_list do test -n "$addr" && $IPTABLES -t nat -A PREROUTING -p tcp -m tcp -d $addr --dport 22 -j DNAT --to-destination 192.168.1.10:22 done done $IPTABLES -t nat -A PREROUTING -p tcp -m tcp -d 192.168.1.1 --dport 22 -j DNAT --to-destination 192.168.1.10:22 $IPTABLES -t nat -A PREROUTING -p tcp -m tcp -d 192.168.2.1 --dport 22 -j DNAT --to-destination 192.168.1.10:22 # # Rule 6 (NAT) # echo "Rule 6 (NAT)" # $IPTABLES -t nat -A PREROUTING -s 192.168.1.0/24 -d ! 200.200.200.200 -j DNAT --to-destination 192.168.2.10 $IPTABLES -t nat -A POSTROUTING -o eth2 -s 192.168.1.0/24 -d 192.168.2.10 -j SNAT --to-source 192.168.2.1 # # Rule 7 (NAT) # echo "Rule 7 (NAT)" # $IPTABLES -t nat -A PREROUTING -p tcp -m tcp -d 192.168.2.1 --dport 22 -j DNAT --to-destination 192.168.1.10 getinterfaces ppp | while read I; do ivar=$(getInterfaceVarName $I) getaddr $I $ivar cmd="$"${ivar}_list eval "addr_list=$cmd" for addr in $addr_list do test -n "$addr" && $IPTABLES -t nat -A PREROUTING -p tcp -m tcp -d $addr --dport 22 -j DNAT --to-destination 192.168.1.10 done done # ================ Table 'filter', rule set Policy # # Rule 0 (ppp*) # echo "Rule 0 (ppp*)" # # ppp clients get addresses on 10.1.1.0 $IPTABLES -N In_RULE_0 $IPTABLES -A INPUT -i ppp+ -s ! 10.1.1.0/24 -j In_RULE_0 $IPTABLES -A FORWARD -i ppp+ -s ! 10.1.1.0/24 -j In_RULE_0 $IPTABLES -A In_RULE_0 -j LOG $IPTABLES -A In_RULE_0 -j DROP # # Rule 1 (ppp*) # echo "Rule 1 (ppp*)" # # ppp clients can not connect to the firewall $IPTABLES -N In_RULE_1 getinterfaces ppp | while read I; do ivar=$(getInterfaceVarName $I) getaddr $I $ivar cmd="$"${ivar}_list eval "addr_list=$cmd" for addr in $addr_list do test -n "$addr" && $IPTABLES -A INPUT -i ppp+ -d $addr -j In_RULE_1 done done $IPTABLES -A In_RULE_1 -j LOG $IPTABLES -A In_RULE_1 -j DROP # # Rule 2 (ppp*) # echo "Rule 2 (ppp*)" # $IPTABLES -N In_RULE_2 $IPTABLES -A INPUT -i ppp+ -j In_RULE_2 $IPTABLES -A In_RULE_2 -j LOG $IPTABLES -A In_RULE_2 -j DROP # # Rule 3 (ppp*) # echo "Rule 3 (ppp*)" # # ppp clients can only connect to the mail # server and web proxy on DMZ $IPTABLES -A FORWARD -i ppp+ -p tcp -m tcp -m multiport -d 192.168.2.10 --dports 25,3128 -m state --state NEW -j ACCEPT # # Rule 4 (ppp*) # echo "Rule 4 (ppp*)" # # ppp clients can not connect to # anything else on DMZ and # internal net $IPTABLES -N In_RULE_4 $IPTABLES -A INPUT -i ppp+ -d 192.168.1.0/24 -j In_RULE_4 $IPTABLES -A INPUT -i ppp+ -d 192.168.2.0/24 -j In_RULE_4 $IPTABLES -A FORWARD -i ppp+ -d 192.168.1.0/24 -j In_RULE_4 $IPTABLES -A FORWARD -i ppp+ -d 192.168.2.0/24 -j In_RULE_4 $IPTABLES -A In_RULE_4 -j LOG $IPTABLES -A In_RULE_4 -j DROP # # Rule 5 (ppp*) # echo "Rule 5 (ppp*)" # $IPTABLES -A INPUT -i ppp+ -s ! 33.33.33.0/24 -m state --state NEW -j ACCEPT $IPTABLES -A FORWARD -i ppp+ -s ! 33.33.33.0/24 -m state --state NEW -j ACCEPT # # Rule 6 (eth2) # echo "Rule 6 (eth2)" # $IPTABLES -N In_RULE_6 $IPTABLES -A INPUT -i eth2 -s ! 192.168.2.0/24 -j In_RULE_6 $IPTABLES -A FORWARD -i eth2 -s ! 192.168.2.0/24 -j In_RULE_6 $IPTABLES -A In_RULE_6 -j LOG $IPTABLES -A In_RULE_6 -j DROP # # Rule 7 (global) # echo "Rule 7 (global)" # # hostF has the same IP address as firewal. $IPTABLES -N RULE_7 $IPTABLES -A OUTPUT -p icmp -m icmp -d 192.168.1.1 --icmp-type 8/0 -m state --state NEW -j RULE_7 $IPTABLES -A INPUT -p icmp -m icmp -d 192.168.1.1 --icmp-type 8/0 -m state --state NEW -j RULE_7 $IPTABLES -A RULE_7 -j LOG $IPTABLES -A RULE_7 -j ACCEPT # # Rule 8 (global) # echo "Rule 8 (global)" # $IPTABLES -N Cid3EFBC67F.0 $IPTABLES -A OUTPUT -p tcp -m tcp --dport 22 -m state --state NEW -j Cid3EFBC67F.0 getinterfaces ppp | while read I; do ivar=$(getInterfaceVarName $I) getaddr $I $ivar cmd="$"${ivar}_list eval "addr_list=$cmd" for addr in $addr_list do test -n "$addr" && $IPTABLES -A Cid3EFBC67F.0 -d $addr -j ACCEPT done done $IPTABLES -A Cid3EFBC67F.0 -d 192.168.1.1 -j ACCEPT $IPTABLES -A Cid3EFBC67F.0 -d 192.168.2.1 -j ACCEPT $IPTABLES -A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -j ACCEPT # # Rule 9 (global) # echo "Rule 9 (global)" # getinterfaces ppp | while read I; do ivar=$(getInterfaceVarName $I) getaddr $I $ivar cmd="$"${ivar}_list eval "addr_list=$cmd" for addr in $addr_list do test -n "$addr" && $IPTABLES -A OUTPUT -p tcp -m tcp -d $addr --dport 22 -m state --state NEW -j ACCEPT done done getinterfaces ppp | while read I; do ivar=$(getInterfaceVarName $I) getaddr $I $ivar cmd="$"${ivar}_list eval "addr_list=$cmd" for addr in $addr_list do test -n "$addr" && $IPTABLES -A INPUT -p tcp -m tcp -d $addr --dport 22 -m state --state NEW -j ACCEPT done done # # Rule 10 (global) # echo "Rule 10 (global)" # $IPTABLES -A OUTPUT -p tcp -m tcp -d 192.168.1.1 --dport 22 -m state --state NEW -j ACCEPT $IPTABLES -A INPUT -p tcp -m tcp -d 192.168.1.1 --dport 22 -m state --state NEW -j ACCEPT # # Rule 11 (global) # echo "Rule 11 (global)" # $IPTABLES -A OUTPUT -p tcp -m tcp -m multiport -d 192.168.1.1 --dports 22,23 -m state --state NEW -j ACCEPT $IPTABLES -A INPUT -p tcp -m tcp -m multiport -d 192.168.1.1 --dports 22,23 -m state --state NEW -j ACCEPT # # Rule 12 (global) # echo "Rule 12 (global)" # $IPTABLES -N Cid3EFBC6A8.0 $IPTABLES -A OUTPUT -p tcp -m tcp -m multiport --dports 22,23 -m state --state NEW -j Cid3EFBC6A8.0 $IPTABLES -A Cid3EFBC6A8.0 -d 192.168.1.1 -j ACCEPT $IPTABLES -A Cid3EFBC6A8.0 -d 192.168.2.1 -j ACCEPT $IPTABLES -N Cid3EFBC6A8.1 $IPTABLES -A INPUT -p tcp -m tcp -m multiport --dports 22,23 -m state --state NEW -j Cid3EFBC6A8.1 $IPTABLES -A Cid3EFBC6A8.1 -d 192.168.1.1 -j ACCEPT $IPTABLES -A Cid3EFBC6A8.1 -d 192.168.2.1 -j ACCEPT # # Rule 13 (global) # echo "Rule 13 (global)" # $IPTABLES -N Cid3EFBC6B3.0 $IPTABLES -A OUTPUT -p tcp -m tcp -m multiport --dports 22,23 -m state --state NEW -j Cid3EFBC6B3.0 $IPTABLES -N RULE_13 $IPTABLES -A Cid3EFBC6B3.0 -d 192.168.1.1 -j RULE_13 $IPTABLES -A Cid3EFBC6B3.0 -d 192.168.2.1 -j RULE_13 $IPTABLES -N Cid3EFBC6B3.1 $IPTABLES -A INPUT -p tcp -m tcp -m multiport --dports 22,23 -m state --state NEW -j Cid3EFBC6B3.1 $IPTABLES -A Cid3EFBC6B3.1 -d 192.168.1.1 -j RULE_13 $IPTABLES -A Cid3EFBC6B3.1 -d 192.168.2.1 -j RULE_13 $IPTABLES -A RULE_13 -j LOG $IPTABLES -A RULE_13 -j ACCEPT # # Rule 14 (global) # echo "Rule 14 (global)" # # firewall is part of Any, so compiler should # generate code in both FORWARD and # OUTPUT chains $IPTABLES -A OUTPUT -d 200.200.200.200 -m state --state NEW -j ACCEPT $IPTABLES -A FORWARD -d 200.200.200.200 -m state --state NEW -j ACCEPT # # Rule 15 (global) # echo "Rule 15 (global)" # # firewall is part of Any, compiler should # generate code for both FORWARD and # INPUT chains $IPTABLES -A INPUT -s 200.200.200.200 -m state --state NEW -j ACCEPT $IPTABLES -A FORWARD -s 200.200.200.200 -m state --state NEW -j ACCEPT # # Rule 16 (global) # echo "Rule 16 (global)" # # because firewall has interface on network # internal_net, compiler should generate code # for both FORWARD and INPUT chains $IPTABLES -A INPUT -s 192.168.1.10 -d 192.168.1.0/24 -m state --state NEW -j ACCEPT $IPTABLES -A FORWARD -s 192.168.1.10 -d 192.168.1.0/24 -m state --state NEW -j ACCEPT # # Rule 17 (global) # echo "Rule 17 (global)" # $IPTABLES -N Cid3EFBC6DC.0 $IPTABLES -A OUTPUT -d 200.200.200.200 -m state --state NEW -j Cid3EFBC6DC.0 $IPTABLES -A Cid3EFBC6DC.0 -s 192.168.1.0/24 -j ACCEPT $IPTABLES -A Cid3EFBC6DC.0 -s 192.168.2.0/24 -j ACCEPT $IPTABLES -N Cid3EFBC6DC.1 $IPTABLES -A FORWARD -d 200.200.200.200 -m state --state NEW -j Cid3EFBC6DC.1 $IPTABLES -A Cid3EFBC6DC.1 -s 192.168.1.0/24 -j ACCEPT $IPTABLES -A Cid3EFBC6DC.1 -s 192.168.2.0/24 -j ACCEPT # # Rule 19 (global) # echo "Rule 19 (global)" # # Automatically generated 'catch all' rule $IPTABLES -N RULE_19 $IPTABLES -A OUTPUT -j RULE_19 $IPTABLES -A INPUT -j RULE_19 $IPTABLES -A FORWARD -j RULE_19 $IPTABLES -A RULE_19 -j LOG $IPTABLES -A RULE_19 -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 "$cmd" in start) log "Activating firewall script generated Tue Mar 8 18:56:16 2011 by vadim" check_tools prolog_commands check_run_time_address_table_files load_modules "nat " configure_interfaces verify_interfaces reset_all script_body ip_forward epilog_commands RETVAL=$? ;; 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