config/outgoingfw/outgoingfw.pl

   1 ###############################################################################
   2 #                                                                             #
   3 # IPFire.org - A linux based firewall                                         #
   4 # Copyright (C) 2007  Michael Tremer & Christian Schmidt                      #
   5 #                                                                             #
   6 # This program is free software: you can redistribute it and/or modify        #
   7 # it under the terms of the GNU General Public License as published by        #
   8 # the Free Software Foundation, either version 3 of the License, or           #
   9 # (at your option) any later version.                                         #
  10 #                                                                             #
  11 # This program is distributed in the hope that it will be useful,             #
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  14 # GNU General Public License for more details.                                #
  15 #                                                                             #
  16 # You should have received a copy of the GNU General Public License           #
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  18 #                                                                             #
  19 ###############################################################################
  20
  21
  22 use strict;
  23 # enable only the following on debugging purpose
  24 #use warnings;
  25
  26 require '/var/ipfire/general-functions.pl';
  27
  28 my %outfwsettings = ();
  29 my %checked = ();
  30 my %selected= () ;
  31 my %netsettings = ();
  32 my $errormessage = "";
  33 my $configentry = "";
  34 my @configs = ();
  35 my @configline = ();
  36 my $p2pentry = "";
  37 my @p2ps = ();
  38 my @p2pline = ();
  39 my @proto = ();
  40 my $CMD = "";
  41 my $P2PSTRING = "";
  42
  43 my $DEBUG = 0;
  44
  45 my $configfile = "/var/ipfire/outgoing/rules";
  46 my $p2pfile = "/var/ipfire/outgoing/p2protocols";
  47
  48 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  49
  50 ### Values that have to be initialized
  51 $outfwsettings{'ACTION'} = '';
  52 $outfwsettings{'VALID'} = 'yes';
  53 $outfwsettings{'EDIT'} = 'no';
  54 $outfwsettings{'NAME'} = '';
  55 $outfwsettings{'SNET'} = '';
  56 $outfwsettings{'SIP'} = '';
  57 $outfwsettings{'SPORT'} = '';
  58 $outfwsettings{'SMAC'} = '';
  59 $outfwsettings{'DIP'} = '';
  60 $outfwsettings{'DPORT'} = '';
  61 $outfwsettings{'PROT'} = '';
  62 $outfwsettings{'STATE'} = '';
  63 $outfwsettings{'DISPLAY_DIP'} = '';
  64 $outfwsettings{'DISPLAY_DPORT'} = '';
  65 $outfwsettings{'DISPLAY_SMAC'} = '';
  66 $outfwsettings{'DISPLAY_SIP'} = '';
  67 $outfwsettings{'POLICY'} = 'MODE0';
  68 my $SOURCE = "";
  69 my $DESTINATION = "";
  70 my $PROTO = "";
  71 my $DPORT = "";
  72 my $DEV = "";
  73 my $MAC = "";
  74 my $POLICY = "";
  75 my $DO = "";
  76
  77 # read files
  78 &General::readhash("${General::swroot}/outgoing/settings", \%outfwsettings);
  79 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  80
  81 open( FILE, "< $configfile" ) or die "Unable to read $configfile";
  82 @configs = <FILE>;
  83 close FILE;
  84
  85 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
  86         $outfwsettings{'STATE'} = "ALLOW";
  87         $POLICY = "DROP";
  88         $DO = "ACCEPT";
  89 } elsif ( $outfwsettings{'POLICY'} eq 'MODE2' ) {
  90         $outfwsettings{'STATE'} = "DENY";
  91         $POLICY = "ACCEPT";
  92         $DO = "DROP";
  93 }
  94
  95 ### Initialize IPTables
  96 system("/sbin/iptables --flush OUTGOINGFW >/dev/null 2>&1");
  97 system("/sbin/iptables --delete-chain OUTGOINGFW >/dev/null 2>&1");
  98 system("/sbin/iptables -N OUTGOINGFW >/dev/null 2>&1");
  99
 100 if ( $outfwsettings{'POLICY'} eq 'MODE0' ) {
 101         exit 0
 102 }
 103
 104 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
 105         $CMD = "/sbin/iptables -A OUTGOINGFW -m state --state ESTABLISHED,RELATED -j ACCEPT";
 106         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 107                 $CMD = "/sbin/iptables -A OUTGOINGFW -p icmp -j ACCEPT";
 108         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 109 }
 110
 111 foreach $configentry (sort @configs)
 112 {
 113         $SOURCE = "";
 114         $DESTINATION = "";
 115         $PROTO = "";
 116         $DPORT = "";
 117         $DEV = "";
 118         $MAC = "";
 119         @configline = split( /\;/, $configentry );
 120         if ($outfwsettings{'STATE'} eq $configline[0]) {
 121                 if ($configline[2] eq 'green') {
 122                         $SOURCE = "$netsettings{'GREEN_NETADDRESS'}/$netsettings{'GREEN_NETMASK'}";
 123                         $DEV = $netsettings{'GREEN_DEV'};
 124                 } elsif ($configline[2] eq 'blue') {
 125                         $SOURCE = "$netsettings{'BLUE_NETADDRESS'}/$netsettings{'BLUE_NETMASK'}";
 126                         $DEV = $netsettings{'BLUE_DEV'};
 127                 } elsif ($configline[2] eq 'orange') {
 128                         $SOURCE = "$netsettings{'ORANGE_NETADDRESS'}/$netsettings{'ORANGE_NETMASK'}";
 129                         $DEV = $netsettings{'ORANGE_DEV'};
 130                 } elsif ($configline[2] eq 'ip') {
 131                         $SOURCE = "$configline[5]";
 132                         $DEV = "";
 133                 } else  {
 134                         $SOURCE = "0/0";
 135                         $DEV = "";
 136                 }
 137
 138                 if ($configline[7]) { $DESTINATION = "$configline[7]"; } else { $DESTINATION = "0/0"; }
 139
 140                 if ($configline[3] eq 'tcp') {
 141                         @proto = ("tcp");
 142                 } elsif ($configline[3] eq 'udp') {
 143                         @proto = ("udp");
 144                 } else {
 145                         @proto = ("tcp", "udp");
 146                 }
 147
 148                 foreach $PROTO (@proto) {
 149                         $CMD = "/sbin/iptables -A OUTGOINGFW -s $SOURCE -d $DESTINATION -p $PROTO";
 150
 151                         if ($configline[8]) {
 152                                 $DPORT = "$configline[8]";
 153                                 $CMD = "$CMD --dport $DPORT";
 154                         }
 155
 156                         if ($DEV) {
 157                                 $CMD = "$CMD -i $DEV";
 158                         }
 159
 160                         if ($configline[6]) {
 161                                 $MAC = "$configline[6]";
 162                                 $CMD = "$CMD -m mac --mac-source $MAC";
 163                         }
 164
 165                         $CMD = "$CMD -o $netsettings{'RED_DEV'}";
 166
 167                         if ($configline[9] eq "aktiv") {
 168                                 if ($DEBUG) {
 169                                         print "$CMD -m state --state NEW -m limit --limit 10/minute -j LOG --log-prefix 'OUTGOINGFW '\n";
 170                                 } else {
 171                                         system("$CMD -m state --state NEW -m limit --limit 10/minute -j LOG --log-prefix 'OUTGOINGFW '");
 172                                 }
 173                         }
 174
 175                         if ($DEBUG) {
 176                                 print "$CMD -j $DO\n";
 177                         } else {
 178                                 system("$CMD -j $DO");
 179                         }
 180     }
 181         }
 182 }
 183
 184 ### Do the P2P-Stuff here
 185 open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile";
 186 @p2ps = <FILE>;
 187 close FILE;
 188
 189 $CMD = "/sbin/iptables -A OUTGOINGFW -m ipp2p";
 190
 191 foreach $p2pentry (sort @p2ps)
 192 {
 193         @p2pline = split( /\;/, $p2pentry );
 194         if ( $outfwsettings{'POLICY'} eq 'MODE2' ) {
 195                 $DO = "DROP";
 196                 if ("$p2pline[2]" eq "off") {
 197                         $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 198                 }
 199         } else {
 200                 $DO = "ACCEPT";
 201                 if ("$p2pline[2]" eq "on") {
 202                         $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 203                 }
 204         }
 205 }
 206 if ($P2PSTRING) {
 207         if ($DEBUG) {
 208                 print "$CMD $P2PSTRING -j $DO\n";
 209         } else {
 210                 system("$CMD $P2PSTRING -j $DO");
 211         }
 212 }
 213
 214 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
 215         $CMD = "/sbin/iptables -A OUTGOINGFW -o $netsettings{'RED_DEV'} -j DROP";
 216         if ($DEBUG) {
 217                 print "$CMD\n";
 218         } else {
 219                 system("$CMD");
 220         }
 221 }