config/outgoingfw/outgoingfw.pl

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2005-2010  IPTifre Team                                       #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22
  23 use strict;
  24 # enable only the following on debugging purpose
  25 #use warnings;
  26
  27 require '/var/ipfire/general-functions.pl';
  28
  29 my %outfwsettings = ();
  30 my %checked = ();
  31 my %selected= () ;
  32 my %netsettings = ();
  33 my $errormessage = "";
  34 my $configentry = "";
  35 my @configs = ();
  36 my @configline = ();
  37 my $p2pentry = "";
  38 my @p2ps = ();
  39 my @p2pline = ();
  40 my $CMD = "";
  41 my $P2PSTRING = "";
  42
  43 my $DEBUG = 0;
  44
  45 my $configfile = "/var/ipfire/outgoing/rules";
  46 my $p2pfile = "/var/ipfire/outgoing/p2protocols";
  47
  48 ### Values that have to be initialized
  49 $outfwsettings{'ACTION'} = '';
  50 $outfwsettings{'VALID'} = 'yes';
  51 $outfwsettings{'EDIT'} = 'no';
  52 $outfwsettings{'NAME'} = '';
  53 $outfwsettings{'SNET'} = '';
  54 $outfwsettings{'SIP'} = '';
  55 $outfwsettings{'SPORT'} = '';
  56 $outfwsettings{'SMAC'} = '';
  57 $outfwsettings{'DIP'} = '';
  58 $outfwsettings{'DPORT'} = '';
  59 $outfwsettings{'PROT'} = '';
  60 $outfwsettings{'STATE'} = '';
  61 $outfwsettings{'DISPLAY_DIP'} = '';
  62 $outfwsettings{'DISPLAY_DPORT'} = '';
  63 $outfwsettings{'DISPLAY_SMAC'} = '';
  64 $outfwsettings{'DISPLAY_SIP'} = '';
  65 $outfwsettings{'POLICY'} = 'MODE0';
  66
  67 my @SOURCE = "";
  68 my $SOURCE = "";
  69 my $DESTINATION = "";
  70 my @PROTO = "";
  71 my $PROTO = "";
  72 my $DPORT = "";
  73 my $DEV = "";
  74 my $MAC = "";
  75 my $POLICY = "";
  76 my $DO = "";
  77 my $DAY = "";
  78
  79 # read files
  80 &General::readhash("${General::swroot}/outgoing/settings", \%outfwsettings);
  81 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  82
  83 $netsettings{'RED_DEV'}=`cat /var/ipfire/red/iface`;
  84 $netsettings{'RED_IP'}=`cat /var/ipfire/red/local-ipaddress`;
  85
  86 open( FILE, "< $configfile" ) or die "Unable to read $configfile";
  87 @configs = <FILE>;
  88 close FILE;
  89
  90 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
  91         $outfwsettings{'STATE'} = "ALLOW";
  92         $POLICY = "DROP";
  93         $DO = "ACCEPT";
  94 } elsif ( $outfwsettings{'POLICY'} eq 'MODE2' ) {
  95         $outfwsettings{'STATE'} = "DENY";
  96         $POLICY = "ACCEPT";
  97         $DO = "DROP -m comment --comment 'DROP_OUTGOINGFW'";
  98 }
  99
 100 ### Initialize IPTables
 101 system("/sbin/iptables --flush OUTGOINGFW >/dev/null 2>&1");
 102 system("/sbin/iptables --delete-chain OUTGOINGFW >/dev/null 2>&1");
 103 system("/sbin/iptables -N OUTGOINGFW >/dev/null 2>&1");
 104
 105 if ( $outfwsettings{'POLICY'} eq 'MODE0' ) {
 106         exit 0
 107 }
 108
 109 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
 110         $CMD = "/sbin/iptables -A OUTGOINGFW -m state --state ESTABLISHED,RELATED -j ACCEPT";
 111         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 112                 $CMD = "/sbin/iptables -A OUTGOINGFW -p icmp -j ACCEPT";
 113         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 114 }
 115
 116 foreach $configentry (sort @configs)
 117 {
 118         @SOURCE = "";
 119         $DESTINATION = "";
 120         $PROTO = "";
 121         $DPORT = "";
 122         $DEV = "";
 123         $MAC = "";
 124         @configline = split( /\;/, $configentry );
 125
 126         if ($outfwsettings{'STATE'} eq $configline[0]) {
 127                 if ($configline[2] eq 'green') {
 128                         @SOURCE = ("$netsettings{'GREEN_NETADDRESS'}/$netsettings{'GREEN_NETMASK'}");
 129                         $DEV = $netsettings{'GREEN_DEV'};
 130                 } elsif ($configline[2] eq 'red') {
 131                         @SOURCE = ("$netsettings{'RED_IP'}");
 132                         $DEV = "";
 133                 } elsif ($configline[2] eq 'blue') {
 134                         @SOURCE = ("$netsettings{'BLUE_NETADDRESS'}/$netsettings{'BLUE_NETMASK'}");
 135                         $DEV = $netsettings{'BLUE_DEV'};
 136                 } elsif ($configline[2] eq 'orange') {
 137                         @SOURCE = ("$netsettings{'ORANGE_NETADDRESS'}/$netsettings{'ORANGE_NETMASK'}");
 138                         $DEV = $netsettings{'ORANGE_DEV'};
 139                 } elsif ($configline[2] eq 'ipsec') {
 140                         @SOURCE = "";
 141                         $DEV = "ipsec+";
 142                 } elsif ($configline[2] eq 'ovpn') {
 143                         @SOURCE = "";
 144                         $DEV = "tun+";
 145                 } elsif ($configline[2] eq 'ip') {
 146                         @SOURCE = ("$configline[5]");
 147                         $DEV = "";
 148                 }
 149                 } elsif ($configline[2] eq 'all') {
 150                         @SOURCE = ("0/0");
 151                         $DEV = "";
 152                 } else {
 153                         if ( -e "/var/ipfire/outgoing/groups/ipgroups/$configline[2]" )
 154                         {
 155                                 @SOURCE = `cat /var/ipfire/outgoing/groups/ipgroups/$configline[2]`;
 156                         }
 157                         $DEV = "";
 158                 }
 159
 160                 if ($configline[7]) { $DESTINATION = "$configline[7]"; } else { $DESTINATION = "0/0"; }
 161
 162                 if ($configline[3] eq 'tcp') {
 163                         @PROTO = ("tcp");
 164                 } elsif ($configline[3] eq 'udp') {
 165                         @PROTO  = ("udp");
 166                 } elsif ($configline[3] eq 'esp') {
 167                         @PROTO = ("esp");
 168                 } elsif ($configline[3] eq 'gre') {
 169                         @PROTO = ("gre");
 170                 } else {
 171                         @PROTO = ("tcp","udp");
 172                 }
 173
 174                 foreach $PROTO (@PROTO){
 175                         foreach $SOURCE (@SOURCE) {
 176                                 $SOURCE =~ s/\s//gi;
 177
 178                                  if ( $SOURCE eq "" ){next;}
 179
 180                                 $CMD = "/sbin/iptables -A OUTGOINGFW -s $SOURCE -d $DESTINATION -p $PROTO";
 181
 182                                  if ($configline[8] && ( $configline[3] ne 'esp' || $configline[3] ne 'gre') ) {
 183                                         $DPORT = "$configline[8]";
 184                                         $CMD = "$CMD -m multiport --destination-port $DPORT";
 185                                  }
 186
 187                                  if ($DEV) {
 188                                         $CMD = "$CMD -i $DEV";
 189                                 }
 190
 191                                 if ($configline[6]) {
 192                                         $MAC = "$configline[6]";
 193                                         $CMD = "$CMD -m mac --mac-source $MAC";
 194                                 }
 195
 196                                 if ($configline[17] && $configline[18]) {
 197                                         if ($configline[10]){$DAY = "Mon,"}
 198                                         if ($configline[11]){$DAY .= "Tue,"}
 199                                         if ($configline[12]){$DAY .= "Wed,"}
 200                                         if ($configline[13]){$DAY .= "Thu,"}
 201                                         if ($configline[14]){$DAY .= "Fri,"}
 202                                         if ($configline[15]){$DAY .= "Sat,"}
 203                                         if ($configline[16]){$DAY .= "Sun"}
 204                                         $CMD = "$CMD -m time --timestart $configline[17] --timestop $configline[18] --weekdays $DAY";
 205                                 }
 206
 207                                 $CMD = "$CMD -o $netsettings{'RED_DEV'}";
 208
 209                                 if ($configline[9] eq "aktiv") {
 210                                         if ($DEBUG) {
 211                                                 print "$CMD -m limit --limit 10/minute -j LOG --log-prefix 'DROP_OUTGOINGFW'\n";
 212                                         } else {
 213                                                 system("$CMD -m limit --limit 10/minute -j LOG --log-prefix 'DROP_OUTGOINGFW'");
 214                                         }
 215                                 }
 216
 217                                 if ($DEBUG) {
 218                                         print "$CMD -j $DO\n";
 219                                 } else {
 220                                         system("$CMD -j $DO");
 221                                 }
 222                         }
 223                 }
 224         }
 225 }
 226
 227 ### Do the P2P-Stuff here
 228 open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile";
 229 @p2ps = <FILE>;
 230 close FILE;
 231
 232 $CMD = "/sbin/iptables -A OUTGOINGFW -m ipp2p";
 233
 234 foreach $p2pentry (sort @p2ps)
 235 {
 236         @p2pline = split( /\;/, $p2pentry );
 237         if ( $outfwsettings{'POLICY'} eq 'MODE2' ) {
 238                 $DO = "DROP";
 239                 if ("$p2pline[2]" eq "off") {
 240                         $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 241                 }
 242         } else {
 243                 $DO = "ACCEPT";
 244                 if ("$p2pline[2]" eq "on") {
 245                         $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 246                 }
 247         }
 248 }
 249 if ($P2PSTRING) {
 250         if ($DEBUG) {
 251                 print "$CMD $P2PSTRING -j $DO\n";
 252         } else {
 253                 system("$CMD $P2PSTRING -j $DO");
 254         }
 255 }
 256
 257 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
 258          if ( $outfwsettings{'MODE1LOG'} eq 'on' ) {
 259                         $CMD = "/sbin/iptables -A OUTGOINGFW -o $netsettings{'RED_DEV'} -m limit --limit 10/minute -j LOG --log-prefix 'DROP_OUTGOINGFW'";
 260                 if ($DEBUG) {
 261                         print "$CMD\n";
 262                 } else {
 263                         system("$CMD");
 264                 }
 265          }
 266
 267         $CMD = "/sbin/iptables -A OUTGOINGFW -o $netsettings{'RED_DEV'} -j DROP -m comment --comment 'DROP_OUTGOINGFW'";
 268         if ($DEBUG) {
 269                 print "$CMD\n";
 270         } else {
 271                 system("$CMD");
 272         }
 273 }