#!/bin/sh 
#
#  This is automatically generated file. DO NOT MODIFY !
#
#  Firewall Builder  fwb_ipt v4.2.0.3470
#
#  Generated Thu Feb 10 14:41:02 2011 PST by vadim
#
# files: * firewall11.fw /etc/fw/firewall11.fw
#
# Compiled for iptables (any version)
#
# testing rules with broadcasts and multicasts and action-on-reject 'TCP reset'. 

# This is BRIDGING FIREWALL 
# Firewall is part of any is OFF

# Interfaces eth0 and eth1 are parts of the bridge; Interface eth2 is external interface (doing NAT and routing on this interface) Interface eth3 is connected to protected network and is used to manage firewall. This is rather realistic configuration for the bridging firewall




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 && $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 $PGM &>/dev/null || {
    echo "$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
    }

    $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 "eth3 10.1.1.1/32" ""
    getaddr eth2  i_eth2
    getaddr6 eth2  i_eth2_v6
    getaddr br0  i_br0
    getaddr6 br0  i_br0_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 1 (NAT)
    # 
    echo "Rule 1 (NAT)"
    # 
    $IPTABLES -t nat -A POSTROUTING -o eth2  -s 192.168.1.0/24  -j MASQUERADE
    $IPTABLES -t nat -A POSTROUTING -o br0  -s 192.168.1.0/24  -j MASQUERADE
    $IPTABLES -t nat -A POSTROUTING -o eth3  -s 192.168.1.0/24  -j SNAT --to-source 10.1.1.1
    # 
    # Rule 2 (NAT)
    # 
    echo "Rule 2 (NAT)"
    # 
    # see bug #1693 , SF bug 3048516
    # combination of using SNAT instead of MASQ,
    # source port translation and dynamic interface
    for i_br0 in $i_br0_list
    do
    test -n "$i_br0" && $IPTABLES -t nat -A POSTROUTING -o br0 -p tcp -m tcp  -s 192.168.1.0/24  --sport 1000:1010  -j SNAT --to-source $i_br0:1000-1010 
    done
    # 
    # Rule 3 (NAT)
    # 
    echo "Rule 3 (NAT)"
    # 
    # see SF bug 3057503
    for i_br0 in $i_br0_list
    do
    test -n "$i_br0" && $IPTABLES -t nat -A PREROUTING  -p tcp -m tcp   --dport 80 -j DNAT --to-destination $i_br0:3128 
    done



    # ================ Table 'filter', rule set Policy
    # 
    # Rule 0 (eth0)
    # 
    echo "Rule 0 (eth0)"
    # 
    $IPTABLES -A FORWARD  -i eth0   -d 192.168.1.255   -m state --state NEW  -j ACCEPT
    # 
    # Rule 1 (eth0)
    # 
    echo "Rule 1 (eth0)"
    # 
    $IPTABLES -A FORWARD  -i eth0   -d 255.255.255.255   -m state --state NEW  -j ACCEPT
    # 
    # Rule 2 (eth0)
    # 
    echo "Rule 2 (eth0)"
    # 
    $IPTABLES -A FORWARD  -o eth0   -d 255.255.255.255   -m state --state NEW  -j ACCEPT
    # 
    # Rule 3 (eth0)
    # 
    echo "Rule 3 (eth0)"
    # 
    $IPTABLES -A FORWARD  -i eth0   -d 255.255.255.255   -m state --state NEW  -j ACCEPT
    $IPTABLES -A FORWARD  -o eth0   -d 255.255.255.255   -m state --state NEW  -j ACCEPT
    # 
    # Rule 4 (eth0)
    # 
    echo "Rule 4 (eth0)"
    # 
    $IPTABLES -A FORWARD  -i eth0   -d 224.0.1.141   -m state --state NEW  -j ACCEPT
    # 
    # Rule 5 (eth0)
    # 
    echo "Rule 5 (eth0)"
    # 
    $IPTABLES -A FORWARD  -i eth0   -d 192.168.1.0/24   -m state --state NEW  -j ACCEPT
    # 
    # Rule 6 (eth0)
    # 
    echo "Rule 6 (eth0)"
    # 
    $IPTABLES -A FORWARD  -i eth0   -d ! 192.168.1.0/24   -m state --state NEW  -j ACCEPT
    # 
    # Rule 7 (br0)
    # 
    echo "Rule 7 (br0)"
    # 
    $IPTABLES -A INPUT  -i br0  -p tcp -m tcp  --dport 22  -m state --state NEW  -j ACCEPT
    # 
    # Rule 8 (br0)
    # 
    echo "Rule 8 (br0)"
    # 
    $IPTABLES -A INPUT  -i br0  -p tcp -m tcp  --dport 22  -m state --state NEW  -j ACCEPT
    # 
    # Rule 9 (br0)
    # 
    echo "Rule 9 (br0)"
    # 
    for i_br0 in $i_br0_list
    do
    test -n "$i_br0" && $IPTABLES -A INPUT  -i br0  -p tcp -m tcp  -d $i_br0   --dport 22  -m state --state NEW  -j ACCEPT 
    done
    # 
    # Rule 10 (br0)
    # 
    echo "Rule 10 (br0)"
    # 
    $IPTABLES -N In_RULE_10
    $IPTABLES -A INPUT  -i br0   -j In_RULE_10
    $IPTABLES -A FORWARD  -i br0   -j In_RULE_10
    $IPTABLES -A In_RULE_10  -j LOG  --log-level debug
    $IPTABLES -A In_RULE_10  -j DROP
    $IPTABLES -N Out_RULE_10
    $IPTABLES -A OUTPUT  -o br0   -j Out_RULE_10
    $IPTABLES -A FORWARD  -o br0   -j Out_RULE_10
    $IPTABLES -A Out_RULE_10  -j LOG  --log-level debug
    $IPTABLES -A Out_RULE_10  -j DROP
    # 
    # Rule 11 (global)
    # 
    echo "Rule 11 (global)"
    # 
    $IPTABLES -A FORWARD -p udp -m udp  -d 255.255.255.255   --dport 68  -m state --state NEW  -j ACCEPT
    $IPTABLES -A INPUT -p udp -m udp  -d 255.255.255.255   --dport 68  -m state --state NEW  -j ACCEPT
    # 
    # Rule 12 (global)
    # 
    echo "Rule 12 (global)"
    # 
    $IPTABLES -N Cid3D94D513.0
    $IPTABLES -A FORWARD -p udp -m udp  --dport 68  -m state --state NEW  -j Cid3D94D513.0
    $IPTABLES -A Cid3D94D513.0  -d 192.168.1.10   -j ACCEPT
    $IPTABLES -A Cid3D94D513.0  -d 192.168.1.255   -j ACCEPT
    # 
    # Rule 13 (global)
    # 
    echo "Rule 13 (global)"
    # 
    $IPTABLES -A FORWARD -p udp -m udp  -d 192.168.1.0   --dport 68  -m state --state NEW  -j ACCEPT
    # 
    # Rule 14 (global)
    # 
    echo "Rule 14 (global)"
    # 
    $IPTABLES -A FORWARD  -d 224.0.1.141   -m state --state NEW  -j ACCEPT
    $IPTABLES -A INPUT  -d 224.0.1.141   -m state --state NEW  -j ACCEPT
    $IPTABLES -A FORWARD  -d 192.168.1.20   -m state --state NEW  -j ACCEPT
    # 
    # Rule 15 (global)
    # 
    echo "Rule 15 (global)"
    # 
    $IPTABLES -A FORWARD  -d 224.0.0.5   -m state --state NEW  -j ACCEPT
    $IPTABLES -A INPUT  -d 224.0.0.5   -m state --state NEW  -j ACCEPT
    # 
    # Rule 16 (global)
    # 
    echo "Rule 16 (global)"
    # 
    $IPTABLES -A FORWARD  -d 224.0.0.18   -m state --state NEW  -j ACCEPT
    $IPTABLES -A INPUT  -d 224.0.0.18   -m state --state NEW  -j ACCEPT
    # 
    # Rule 17 (global)
    # 
    echo "Rule 17 (global)"
    # 
    $IPTABLES -A FORWARD -p tcp -m tcp  -d 192.168.1.10   --dport 6667  -m state --state NEW  -j ACCEPT
    # 
    # Rule 18 (global)
    # 
    echo "Rule 18 (global)"
    # 
    $IPTABLES -N RULE_18
    $IPTABLES -A FORWARD  -d 192.168.1.10   -j RULE_18
    $IPTABLES -A RULE_18  -j LOG  --log-level debug
    $IPTABLES -A RULE_18  -j DROP
    # 
    # Rule 19 (global)
    # 
    echo "Rule 19 (global)"
    # 
    # this rule should generate commands
    # in both INPUT and FORWARD chains
    # because this is a bridging firewall
    # see bug #811860
    $IPTABLES -N Cid3DD4BBC7.0
    $IPTABLES -A FORWARD -p tcp -m tcp  -s 192.168.1.0/24   --dport 22  -m state --state NEW  -j Cid3DD4BBC7.0
    for i_br0 in $i_br0_list
    do
    test -n "$i_br0" && $IPTABLES -A Cid3DD4BBC7.0  -d $i_br0   -j ACCEPT 
    done
    for i_eth2 in $i_eth2_list
    do
    test -n "$i_eth2" && $IPTABLES -A Cid3DD4BBC7.0  -d $i_eth2   -j ACCEPT 
    done
    $IPTABLES -A Cid3DD4BBC7.0  -d 10.1.1.1   -j ACCEPT
    $IPTABLES -A INPUT -p tcp -m tcp  -s 192.168.1.0/24   --dport 22  -m state --state NEW  -j ACCEPT
    # 
    # Rule 20 (global)
    # 
    echo "Rule 20 (global)"
    # 
    for i_br0 in $i_br0_list
    do
    test -n "$i_br0" && $IPTABLES -A FORWARD  -d $i_br0   -m state --state NEW  -j ACCEPT 
    done
    for i_eth2 in $i_eth2_list
    do
    test -n "$i_eth2" && $IPTABLES -A FORWARD  -d $i_eth2   -m state --state NEW  -j ACCEPT 
    done
    $IPTABLES -A FORWARD  -d 10.1.1.1   -m state --state NEW  -j ACCEPT
    $IPTABLES -A INPUT  -m state --state NEW  -j ACCEPT
    # 
    # Rule 21 (global)
    # 
    echo "Rule 21 (global)"
    # 
    $IPTABLES -A FORWARD  -d 10.1.1.1   -m state --state NEW  -j ACCEPT
    $IPTABLES -A INPUT  -d 10.1.1.1   -m state --state NEW  -j ACCEPT
    # 
    # Rule 23 (global)
    # 
    echo "Rule 23 (global)"
    # 
    $IPTABLES -N RULE_23
    $IPTABLES -A FORWARD  -j RULE_23
    $IPTABLES -A RULE_23  -j LOG  --log-level debug
    $IPTABLES -A RULE_23  -j DROP
    # 
    # Rule 24 (global)
    # 
    echo "Rule 24 (global)"
    # 
    $IPTABLES -N RULE_24
    $IPTABLES -A OUTPUT  -j RULE_24
    $IPTABLES -A INPUT  -j RULE_24
    $IPTABLES -A FORWARD  -j RULE_24
    $IPTABLES -A RULE_24  -j LOG  --log-level debug
    $IPTABLES -A RULE_24  -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 Thu Feb 10 14:41:02 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