config/outgoingfw/outgoingfw.pl

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2007-2011  IPFire 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 require "${General::swroot}/lang.pl";
  29
  30 my %outfwsettings = ();
  31 my %checked = ();
  32 my %selected= () ;
  33 my %netsettings = ();
  34 my $errormessage = "";
  35 my $configentry = "";
  36 my @configs = ();
  37 my @configline = ();
  38 my $p2pentry = "";
  39 my @p2ps = ();
  40 my @p2pline = ();
  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 $SOURCE = "";
  70 my $DESTINATION = "";
  71 my @PROTO = "";
  72 my $PROTO = "";
  73 my $DPORT = "";
  74 my $DEV = "";
  75 my $MAC = "";
  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         $DO = "RETURN";
  93 } elsif ( $outfwsettings{'POLICY'} eq 'MODE2' ) {
  94         $outfwsettings{'STATE'} = "DENY";
  95         $DO = "DROP -m comment --comment 'DROP_OUTGOINGFW '";
  96 }
  97
  98 ### Initialize IPTables
  99 system("/sbin/iptables --flush OUTGOINGFW >/dev/null 2>&1");
 100 system("/sbin/iptables --delete-chain OUTGOINGFW >/dev/null 2>&1");
 101 system("/sbin/iptables -N OUTGOINGFW >/dev/null 2>&1");
 102
 103 system("/sbin/iptables --flush OUTGOINGFWMAC >/dev/null 2>&1");
 104 system("/sbin/iptables --delete-chain OUTGOINGFWMAC >/dev/null 2>&1");
 105 system("/sbin/iptables -N OUTGOINGFWMAC >/dev/null 2>&1");
 106
 107 if ( $outfwsettings{'POLICY'} eq 'MODE0' ) {
 108         &firewall_local_reload();
 109         exit 0
 110 }
 111
 112 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
 113         $CMD = "/sbin/iptables -A OUTGOINGFW -m state --state ESTABLISHED,RELATED -j RETURN";
 114         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 115         $CMD = "/sbin/iptables -A OUTGOINGFWMAC -m state --state ESTABLISHED,RELATED -j RETURN";
 116         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 117                 $CMD = "/sbin/iptables -A OUTGOINGFW -p icmp -j RETURN";
 118         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 119                 $CMD = "/sbin/iptables -A OUTGOINGFWMAC -p icmp -j RETURN";
 120         if ($DEBUG) { print "$CMD\n"; } else { system("$CMD"); }
 121 }
 122
 123 foreach $configentry (sort @configs)
 124 {
 125         @SOURCE = "";
 126         $DESTINATION = "";
 127         $PROTO = "";
 128         $DPORT = "";
 129         $DEV = "";
 130         $MAC = "";
 131         @configline = split( /\;/, $configentry );
 132
 133         if ($outfwsettings{'STATE'} eq $configline[0]) {
 134                 if ($configline[2] eq 'green') {
 135                         @SOURCE = ("$netsettings{'GREEN_NETADDRESS'}/$netsettings{'GREEN_NETMASK'}");
 136                         $DEV = $netsettings{'GREEN_DEV'};
 137                 } elsif ($configline[2] eq 'red') {
 138                         @SOURCE = ("$netsettings{'RED_IP'}");
 139                         $DEV = "";
 140                 } elsif ($configline[2] eq 'blue') {
 141                         @SOURCE = ("$netsettings{'BLUE_NETADDRESS'}/$netsettings{'BLUE_NETMASK'}");
 142                         $DEV = $netsettings{'BLUE_DEV'};
 143                 } elsif ($configline[2] eq 'orange') {
 144                         @SOURCE = ("$netsettings{'ORANGE_NETADDRESS'}/$netsettings{'ORANGE_NETMASK'}");
 145                         $DEV = $netsettings{'ORANGE_DEV'};
 146                 } elsif ($configline[2] eq 'ipsec') {
 147                         @SOURCE = "";
 148                         $DEV = "ipsec+";
 149                 } elsif ($configline[2] eq 'ovpn') {
 150                         @SOURCE = "";
 151                         $DEV = "tun+";
 152                 } elsif ($configline[2] eq 'ip') {
 153                         @SOURCE = ("$configline[5]");
 154                         $DEV = "";
 155                 } elsif ($configline[2] eq 'mac') {
 156                         @SOURCE = ("$configline[6]");
 157                         $DEV = "";
 158                 } elsif ($configline[2] eq 'all') {
 159                         @SOURCE = ("0/0");
 160                         $DEV = "";
 161                 } else {
 162                         if ( -e "/var/ipfire/outgoing/groups/ipgroups/$configline[2]" ) {
 163                                 @SOURCE = `cat /var/ipfire/outgoing/groups/ipgroups/$configline[2]`;
 164                         } elsif ( -e "/var/ipfire/outgoing/groups/macgroups/$configline[2]" ) {
 165                                 @SOURCE = `cat /var/ipfire/outgoing/groups/macgroups/$configline[2]`;
 166                                 $configline[2] = "mac";
 167                         }
 168                         $DEV = "";
 169                 }
 170
 171                 if ($configline[7]) { $DESTINATION = "$configline[7]"; } else { $DESTINATION = "0/0"; }
 172
 173                 if ($configline[3] eq 'tcp') {
 174                         @PROTO = ("tcp");
 175                 } elsif ($configline[3] eq 'udp') {
 176                         @PROTO  = ("udp");
 177                 } elsif ($configline[3] eq 'esp') {
 178                         @PROTO = ("esp");
 179                 } elsif ($configline[3] eq 'gre') {
 180                         @PROTO = ("gre");
 181                 } else {
 182                         @PROTO = ("tcp","udp");
 183                 }
 184
 185                 my $macrule = 0;
 186                 foreach $PROTO (@PROTO){
 187                         foreach $SOURCE (@SOURCE) {
 188                                 $SOURCE =~ s/\s//gi;
 189
 190                                 if ( $SOURCE eq "" || $configline[1] eq "" ){next;}
 191
 192                                 if ( ( $configline[6] ne "" || $configline[2] eq 'mac' ) && $configline[2] ne 'all'){
 193                                         $SOURCE =~ s/[^a-zA-Z0-9]/:/gi;
 194                                         $CMD = "-m mac --mac-source $SOURCE -d $DESTINATION -p $PROTO";
 195                                         $macrule = 1;
 196                                 } else {
 197                                         $CMD = "-s $SOURCE -d $DESTINATION -p $PROTO";
 198                                 }
 199
 200                                  if ($configline[8] && ( $configline[3] ne 'esp' || $configline[3] ne 'gre') ) {
 201                                         $DPORT = "$configline[8]";
 202                                         $CMD = "$CMD -m multiport --destination-port $DPORT";
 203                                  }
 204
 205                                  if ($DEV) {
 206                                         $CMD = "$CMD -i $DEV";
 207                                 }
 208
 209                                 if ($configline[17] && $configline[18]) {
 210                                         $DAY = "";
 211                                         if ($configline[10]){$DAY = "Mon,"}
 212                                         if ($configline[11]){$DAY .= "Tue,"}
 213                                         if ($configline[12]){$DAY .= "Wed,"}
 214                                         if ($configline[13]){$DAY .= "Thu,"}
 215                                         if ($configline[14]){$DAY .= "Fri,"}
 216                                         if ($configline[15]){$DAY .= "Sat,"}
 217                                         if ($configline[16]){$DAY .= "Sun"}
 218                                         $CMD = "$CMD -m time --timestart $configline[17] --timestop $configline[18] --weekdays $DAY";
 219                                 }
 220
 221                                 $CMD = "$CMD -o $netsettings{'RED_DEV'}";
 222
 223                                 if ( $configline[9] eq $Lang::tr{'aktiv'} && $outfwsettings{'POLICY'} eq 'MODE1' ) {
 224                                         applyrule("$CMD -m limit --limit 10/minute -j LOG --log-prefix 'LOG_OUTGOINGFW '", $macrule);
 225                                 } elsif ( $configline[9] eq $Lang::tr{'aktiv'} && $outfwsettings{'POLICY'} eq 'MODE2' ) {
 226                                         applyrule("$CMD -m limit --limit 10/minute -j LOG --log-prefix 'DROP_OUTGOINGFW '", $macrule);
 227                                 }
 228
 229                                 applyrule("$CMD -j $DO", $macrule);
 230                         }
 231                 }
 232         }
 233 }
 234
 235 ### Do the P2P-Stuff here
 236 open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile";
 237 @p2ps = <FILE>;
 238 close FILE;
 239
 240 $CMD = "-m ipp2p";
 241
 242 foreach $p2pentry (sort @p2ps) {
 243         @p2pline = split( /\;/, $p2pentry );
 244         if ( $outfwsettings{'POLICY'} eq 'MODE2' ) {
 245                 $DO = "DROP";
 246                 if ("$p2pline[2]" eq "off") {
 247                         $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 248                 }
 249         } else {
 250                 $DO = "RETURN";
 251                 if ("$p2pline[2]" eq "on") {
 252                         $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 253                 }
 254         }
 255 }
 256 if ($P2PSTRING) {
 257         applyrule("$CMD $P2PSTRING -j $DO", 0);
 258 }
 259
 260 if ( $outfwsettings{'POLICY'} eq 'MODE1' ) {
 261         if ( $outfwsettings{'MODE1LOG'} eq 'on' ) {
 262                 applyrule("-o $netsettings{'RED_DEV'} -m limit --limit 10/minute -j LOG --log-prefix 'DROP_OUTGOINGFW '", 0);
 263         }
 264
 265         applyrule("-o $netsettings{'RED_DEV'} -j DROP -m comment --comment 'DROP_OUTGOINGFW '", 0);
 266 }
 267
 268 &firewall_local_reload();
 269
 270 sub applyrule($$) {
 271         my $cmd = shift;
 272         my $macrule = shift;
 273
 274         system("/sbin/iptables -A OUTGOINGFWMAC $cmd");
 275         if ($macrule == 0) {
 276                 system("/sbin/iptables -A OUTGOINGFW $cmd");
 277         }
 278 }
 279
 280 sub firewall_local_reload() {
 281         my $script = "/etc/sysconfig/firewall.local";
 282
 283         if ( -x $script ) {
 284                 system("$script reload >/dev/null 2>&1");
 285         }
 286 }