config/outgoingfw/outgoingfw.pl

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2007  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 my $SOURCE = "";
  68 my $DESTINATION = "";
  69 my $PROTO = "";
  70 my $DPORT = "";
  71 my $DEV = "";
  72 my $MAC = "";
  73 my $POLICY = "";
  74 my $DO = "";
  75
  76 # read files
  77 &General::readhash("${General::swroot}/outgoing/settings", \%outfwsettings);
  78 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  79
  80 $netsettings{'RED_DEV'}=`cat /var/ipfire/red/iface`;
  81
  82 open( FILE, "< $configfile" ) or die "Unable to read $configfile";
  83 @configs = <FILE>;
  84 close FILE;
  85
  86 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
  87         $outfwsettings{'STATE'} = "ALLOW";
  88         $POLICY = "DROP";
  89         $DO = "ACCEPT";
  90 } elsif ( $outfwsettings{'POLICY'} eq 'MODE2' ) {
  91         $outfwsettings{'STATE'} = "DENY";
  92         $POLICY = "ACCEPT";
  93         $DO = "DROP -m comment --comment 'DROP_OUTGOINGFW'";
  94 }
  95
  96 ### Initialize IPTables
  97 system("/sbin/iptables --flush OUTGOINGFW >/dev/null 2>&1");
  98 system("/sbin/iptables --delete-chain OUTGOINGFW >/dev/null 2>&1");
  99 system("/sbin/iptables -N OUTGOINGFW >/dev/null 2>&1");
 100
 101 if ( $outfwsettings{'POLICY'} eq 'MODE0' ) {
 102         exit 0
 103 }
 104
 105 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
 106         $CMD = "/sbin/iptables -A OUTGOINGFW -m state --state ESTABLISHED,RELATED -j ACCEPT";
 107         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 108                 $CMD = "/sbin/iptables -A OUTGOINGFW -p icmp -j ACCEPT";
 109         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 110 }
 111
 112 foreach $configentry (sort @configs)
 113 {
 114         $SOURCE = "";
 115         $DESTINATION = "";
 116         $PROTO = "";
 117         $DPORT = "";
 118         $DEV = "";
 119         $MAC = "";
 120         @configline = split( /\;/, $configentry );
 121         if ($outfwsettings{'STATE'} eq $configline[0]) {
 122                 if ($configline[2] eq 'green') {
 123                         $SOURCE = "$netsettings{'GREEN_NETADDRESS'}/$netsettings{'GREEN_NETMASK'}";
 124                         $DEV = $netsettings{'GREEN_DEV'};
 125                 } elsif ($configline[2] eq 'blue') {
 126                         $SOURCE = "$netsettings{'BLUE_NETADDRESS'}/$netsettings{'BLUE_NETMASK'}";
 127                         $DEV = $netsettings{'BLUE_DEV'};
 128                 } elsif ($configline[2] eq 'orange') {
 129                         $SOURCE = "$netsettings{'ORANGE_NETADDRESS'}/$netsettings{'ORANGE_NETMASK'}";
 130                         $DEV = $netsettings{'ORANGE_DEV'};
 131                 } elsif ($configline[2] eq 'ip') {
 132                         $SOURCE = "$configline[5]";
 133                         $DEV = "";
 134                 } else  {
 135                         $SOURCE = "0/0";
 136                         $DEV = "";
 137                 }
 138
 139                 if ($configline[7]) { $DESTINATION = "$configline[7]"; } else { $DESTINATION = "0/0"; }
 140
 141                 if ($configline[3] eq 'tcp') {
 142                         @proto = ("tcp");
 143                 } elsif ($configline[3] eq 'udp') {
 144                         @proto = ("udp");
 145                 } else {
 146                         @proto = ("tcp", "udp");
 147                 }
 148
 149                 foreach $PROTO (@proto) {
 150                         $CMD = "/sbin/iptables -A OUTGOINGFW -s $SOURCE -d $DESTINATION -p $PROTO";
 151
 152                         if ($configline[8]) {
 153                                 $DPORT = "$configline[8]";
 154                                 $CMD = "$CMD --dport $DPORT";
 155                         }
 156
 157                         if ($DEV) {
 158                                 $CMD = "$CMD -i $DEV";
 159                         }
 160
 161                         if ($configline[6]) {
 162                                 $MAC = "$configline[6]";
 163                                 $CMD = "$CMD -m mac --mac-source $MAC";
 164                         }
 165
 166                         $CMD = "$CMD -o $netsettings{'RED_DEV'}";
 167
 168                         if ($configline[9] eq "aktiv") {
 169                                 if ($DEBUG) {
 170                                         print "$CMD -m limit --limit 10/minute -j LOG --log-prefix 'DROP_OUTGOINGFW'\n";
 171                                 } else {
 172                                         system("$CMD -m limit --limit 10/minute -j LOG --log-prefix 'DROP_OUTGOINGFW'");
 173                                 }
 174                         }
 175
 176                         if ($DEBUG) {
 177                                 print "$CMD -j $DO\n";
 178                         } else {
 179                                 system("$CMD -j $DO");
 180                         }
 181     }
 182         }
 183 }
 184
 185 ### Do the P2P-Stuff here
 186 open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile";
 187 @p2ps = <FILE>;
 188 close FILE;
 189
 190 $CMD = "/sbin/iptables -A OUTGOINGFW -m ipp2p";
 191
 192 foreach $p2pentry (sort @p2ps)
 193 {
 194         @p2pline = split( /\;/, $p2pentry );
 195         if ( $outfwsettings{'POLICY'} eq 'MODE2' ) {
 196                 $DO = "DROP";
 197                 if ("$p2pline[2]" eq "off") {
 198                         $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 199                 }
 200         } else {
 201                 $DO = "ACCEPT";
 202                 if ("$p2pline[2]" eq "on") {
 203                         $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 204                 }
 205         }
 206 }
 207 if ($P2PSTRING) {
 208         if ($DEBUG) {
 209                 print "$CMD $P2PSTRING -j $DO\n";
 210         } else {
 211                 system("$CMD $P2PSTRING -j $DO");
 212         }
 213 }
 214
 215 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
 216          if ( $outfwsettings{'MODE1LOG'} eq 'on' ) {
 217                         $CMD = "/sbin/iptables -A OUTGOINGFW -o $netsettings{'RED_DEV'} -m limit --limit 10/minute -j LOG --log-prefix 'DROP_OUTGOINGFW'";
 218                 if ($DEBUG) {
 219                         print "$CMD\n";
 220                 } else {
 221                         system("$CMD");
 222                 }
 223          }
 224
 225         $CMD = "/sbin/iptables -A OUTGOINGFW -o $netsettings{'RED_DEV'} -j DROP -m comment --comment 'DROP_OUTGOINGFW'";
 226         if ($DEBUG) {
 227                 print "$CMD\n";
 228         } else {
 229                 system("$CMD");
 230         }
 231 }