config/outgoingfw/outgoingfw.pl

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2009  Michael Tremer & Christian Schmidt                      #
   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 @proto = ();
  41 my $CMD = "";
  42 my $P2PSTRING = "";
  43
  44 my $DEBUG = 0;
  45
  46 my $configfile = "/var/ipfire/outgoing/rules";
  47 my $p2pfile = "/var/ipfire/outgoing/p2protocols";
  48
  49 ### Values that have to be initialized
  50 $outfwsettings{'ACTION'} = '';
  51 $outfwsettings{'VALID'} = 'yes';
  52 $outfwsettings{'EDIT'} = 'no';
  53 $outfwsettings{'NAME'} = '';
  54 $outfwsettings{'SNET'} = '';
  55 $outfwsettings{'SIP'} = '';
  56 $outfwsettings{'SPORT'} = '';
  57 $outfwsettings{'SMAC'} = '';
  58 $outfwsettings{'DIP'} = '';
  59 $outfwsettings{'DPORT'} = '';
  60 $outfwsettings{'PROT'} = '';
  61 $outfwsettings{'STATE'} = '';
  62 $outfwsettings{'DISPLAY_DIP'} = '';
  63 $outfwsettings{'DISPLAY_DPORT'} = '';
  64 $outfwsettings{'DISPLAY_SMAC'} = '';
  65 $outfwsettings{'DISPLAY_SIP'} = '';
  66 $outfwsettings{'POLICY'} = 'MODE0';
  67
  68 my $SOURCE = "";
  69 my $DESTINATION = "";
  70 my $PROTO = "";
  71 my $DPORT = "";
  72 my $DEV = "";
  73 my $MAC = "";
  74 my $POLICY = "";
  75 my $DO = "";
  76 my $DAY = "";
  77
  78 # read files
  79 &General::readhash("${General::swroot}/outgoing/settings", \%outfwsettings);
  80 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  81
  82 $netsettings{'RED_DEV'}=`cat /var/ipfire/red/iface`;
  83 $netsettings{'RED_IP'}=`cat /var/ipfire/red/local-ipaddress`;
  84
  85 open( FILE, "< $configfile" ) or die "Unable to read $configfile";
  86 @configs = <FILE>;
  87 close FILE;
  88
  89 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
  90         $outfwsettings{'STATE'} = "ALLOW";
  91         $POLICY = "DROP";
  92         $DO = "ACCEPT";
  93 } elsif ( $outfwsettings{'POLICY'} eq 'MODE2' ) {
  94         $outfwsettings{'STATE'} = "DENY";
  95         $POLICY = "ACCEPT";
  96         $DO = "DROP -m comment --comment 'DROP_OUTGOINGFW'";
  97 }
  98
  99 ### Initialize IPTables
 100 system("/sbin/iptables --flush OUTGOINGFW >/dev/null 2>&1");
 101 system("/sbin/iptables --delete-chain OUTGOINGFW >/dev/null 2>&1");
 102 system("/sbin/iptables -N OUTGOINGFW >/dev/null 2>&1");
 103
 104 if ( $outfwsettings{'POLICY'} eq 'MODE0' ) {
 105         exit 0
 106 }
 107
 108 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
 109         $CMD = "/sbin/iptables -A OUTGOINGFW -m state --state ESTABLISHED,RELATED -j ACCEPT";
 110         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 111                 $CMD = "/sbin/iptables -A OUTGOINGFW -p icmp -j ACCEPT";
 112         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 113 }
 114
 115 foreach $configentry (sort @configs)
 116 {
 117         $SOURCE = "";
 118         $DESTINATION = "";
 119         $PROTO = "";
 120         $DPORT = "";
 121         $DEV = "";
 122         $MAC = "";
 123         @configline = split( /\;/, $configentry );
 124         if ($outfwsettings{'STATE'} eq $configline[0]) {
 125                 if ($configline[2] eq 'green') {
 126                         $SOURCE = "$netsettings{'GREEN_NETADDRESS'}/$netsettings{'GREEN_NETMASK'}";
 127                         $DEV = $netsettings{'GREEN_DEV'};
 128                 } elsif ($configline[2] eq 'red') {
 129                         $SOURCE = "$netsettings{'RED_IP'}";
 130                         $DEV = "";
 131                 } elsif ($configline[2] eq 'blue') {
 132                         $SOURCE = "$netsettings{'BLUE_NETADDRESS'}/$netsettings{'BLUE_NETMASK'}";
 133                         $DEV = $netsettings{'BLUE_DEV'};
 134                 } elsif ($configline[2] eq 'orange') {
 135                         $SOURCE = "$netsettings{'ORANGE_NETADDRESS'}/$netsettings{'ORANGE_NETMASK'}";
 136                         $DEV = $netsettings{'ORANGE_DEV'};
 137                 } elsif ($configline[2] eq 'ip') {
 138                         $SOURCE = "$configline[5]";
 139                         $DEV = "";
 140                 } else  {
 141                         $SOURCE = "0/0";
 142                         $DEV = "";
 143                 }
 144
 145                 if ($configline[7]) { $DESTINATION = "$configline[7]"; } else { $DESTINATION = "0/0"; }
 146
 147                 if ($configline[3] eq 'tcp') {
 148                         @proto = ("tcp");
 149                 } elsif ($configline[3] eq 'udp') {
 150                         @proto = ("udp");
 151                 } elsif ($configline[3] eq 'esp') {
 152                         @proto = ("esp");
 153                 } elsif ($configline[3] eq 'gre') {
 154                         @proto = ("gre");
 155                 } else {
 156                         @proto = ("tcp","udp");
 157                 }
 158
 159
 160                 foreach $PROTO (@proto) {
 161                         $CMD = "/sbin/iptables -A OUTGOINGFW -s $SOURCE -d $DESTINATION -p $PROTO";
 162
 163                          if ($configline[8] && $configline[3] ne 'esp' && $configline[3] ne 'gre') {
 164                                 $DPORT = "$configline[8]";
 165                                 $CMD = "$CMD --dport $DPORT";
 166                          }
 167
 168                         if ($DEV) {
 169                                 $CMD = "$CMD -i $DEV";
 170                         }
 171
 172                         if ($configline[6]) {
 173                                 $MAC = "$configline[6]";
 174                                 $CMD = "$CMD -m mac --mac-source $MAC";
 175                         }
 176
 177                         if ($configline[17] && $configline[18]) {
 178                                 if ($configline[10]){$DAY = "Mon,"}
 179                                 if ($configline[11]){$DAY .= "Tue,"}
 180                                 if ($configline[12]){$DAY .= "Wed,"}
 181                                 if ($configline[13]){$DAY .= "Thu,"}
 182                                 if ($configline[14]){$DAY .= "Fri,"}
 183                                 if ($configline[15]){$DAY .= "Sat,"}
 184                                 if ($configline[16]){$DAY .= "Sun"}
 185                                 $CMD = "$CMD -m time --timestart $configline[17] --timestop $configline[18] --weekdays $DAY";
 186                         }
 187
 188                         $CMD = "$CMD -o $netsettings{'RED_DEV'}";
 189
 190                         if ($configline[9] eq "aktiv") {
 191                                 if ($DEBUG) {
 192                                         print "$CMD -m limit --limit 10/minute -j LOG --log-prefix 'DROP_OUTGOINGFW'\n";
 193                                 } else {
 194                                         system("$CMD -m limit --limit 10/minute -j LOG --log-prefix 'DROP_OUTGOINGFW'");
 195                                 }
 196                         }
 197
 198                         if ($DEBUG) {
 199                                 print "$CMD -j $DO\n";
 200                         } else {
 201                                 system("$CMD -j $DO");
 202                         }
 203     }
 204         }
 205 }
 206
 207 ### Do the P2P-Stuff here
 208 open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile";
 209 @p2ps = <FILE>;
 210 close FILE;
 211
 212 $CMD = "/sbin/iptables -A OUTGOINGFW -m ipp2p";
 213
 214 foreach $p2pentry (sort @p2ps)
 215 {
 216         @p2pline = split( /\;/, $p2pentry );
 217         if ( $outfwsettings{'POLICY'} eq 'MODE2' ) {
 218                 $DO = "DROP";
 219                 if ("$p2pline[2]" eq "off") {
 220                         $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 221                 }
 222         } else {
 223                 $DO = "ACCEPT";
 224                 if ("$p2pline[2]" eq "on") {
 225                         $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 226                 }
 227         }
 228 }
 229 if ($P2PSTRING) {
 230         if ($DEBUG) {
 231                 print "$CMD $P2PSTRING -j $DO\n";
 232         } else {
 233                 system("$CMD $P2PSTRING -j $DO");
 234         }
 235 }
 236
 237 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
 238          if ( $outfwsettings{'MODE1LOG'} eq 'on' ) {
 239                         $CMD = "/sbin/iptables -A OUTGOINGFW -o $netsettings{'RED_DEV'} -m limit --limit 10/minute -j LOG --log-prefix 'DROP_OUTGOINGFW'";
 240                 if ($DEBUG) {
 241                         print "$CMD\n";
 242                 } else {
 243                         system("$CMD");
 244                 }
 245          }
 246
 247         $CMD = "/sbin/iptables -A OUTGOINGFW -o $netsettings{'RED_DEV'} -j DROP -m comment --comment 'DROP_OUTGOINGFW'";
 248         if ($DEBUG) {
 249                 print "$CMD\n";
 250         } else {
 251                 system("$CMD");
 252         }
 253 }