config/forwardfw/rules.pl

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2012                                                                                                              #
   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 # Hi folks! I hope this code is useful for all. I needed something to handle  #
  23 # my VPN Connections in a comfortable way.                                                                #
  24 # This script builds firewallrules from the webinterface                      #
  25 ###############################################################################
  26
  27 use strict;
  28 no warnings 'uninitialized';
  29
  30 # enable only the following on debugging purpose
  31 #use warnings;
  32 #use CGI::Carp 'fatalsToBrowser';
  33
  34 my %fwdfwsettings=();
  35 my %defaultNetworks=();
  36 my %configfwdfw=();
  37 my %color=();
  38 my %icmptypes=();
  39 my %ovpnSettings=();
  40 my %customgrp=();
  41 our %sourcehash=();
  42 our %targethash=();
  43 my @timeframe=();
  44 my %configinputfw=();
  45 my %aliases=();
  46 my @DPROT=();
  47 my @p2ps=();
  48 require '/var/ipfire/general-functions.pl';
  49 require "${General::swroot}/lang.pl";
  50 require "${General::swroot}/forward/bin/firewall-lib.pl";
  51
  52 my $configfwdfw         = "${General::swroot}/forward/config";
  53 my $configinput     = "${General::swroot}/forward/input";
  54 my $p2pfile                     = "${General::swroot}/forward/p2protocols";
  55 my $configgrp           = "${General::swroot}/fwhosts/customgroups";
  56 my $netsettings         = "${General::swroot}/ethernet/settings";
  57 my $errormessage='';
  58 my $orange;
  59 my $green;
  60 my $blue;
  61 my ($TYPE,$PROT,$SPROT,$DPROT,$SPORT,$DPORT,$TIME,$TIMEFROM,$TIMETILL,$SRC_TGT);
  62 my $CHAIN="FORWARDFW";
  63
  64
  65 &General::readhash("${General::swroot}/forward/settings", \%fwdfwsettings);
  66 &General::readhash("$netsettings", \%defaultNetworks);
  67 &General::readhasharray($configfwdfw, \%configfwdfw);
  68 &General::readhasharray($configinput, \%configinputfw);
  69 &General::readhasharray($configgrp, \%customgrp);
  70 &General::get_aliases(\%aliases);
  71
  72 ################################
  73 #    DEBUG/TEST                #
  74 ################################
  75 my $MODE=1;     # 0 - normal operation
  76                                 # 1 - print configline and rules to console
  77                                 #
  78 ################################
  79 my $param=shift;
  80
  81 if($param eq 'flush'){
  82         if ($MODE eq '1'){
  83                 print " Flushing chains...\n";
  84         }
  85         &flush;
  86 }else{
  87         if ($MODE eq '1'){
  88                 print " Flushing chains...\n";
  89         }
  90         &flush;
  91         if ($MODE eq '1'){
  92                 print " Preparing rules...\n";
  93         }
  94         &preparerules;
  95         if($MODE eq '0'){
  96                 if ($fwdfwsettings{'POLICY'} eq 'MODE1'){
  97                         &p2pblock;
  98                         system ("/usr/sbin/firewall-forward-policy");
  99                 }elsif($fwdfwsettings{'POLICY'} eq 'MODE2'){
 100                         $defaultNetworks{'GREEN_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'GREEN_NETMASK'});
 101                         $green="$defaultNetworks{'GREEN_ADDRESS'}/$defaultNetworks{'GREEN_NETMASK'}";
 102                         if ($defaultNetworks{'BLUE_DEV'}){
 103                                 $defaultNetworks{'BLUE_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'BLUE_NETMASK'});
 104                                 $blue="$defaultNetworks{'BLUE_ADDRESS'}/$defaultNetworks{'BLUE_NETMASK'}";
 105                                 #set default rules for BLUE
 106                                 system ("iptables -A $CHAIN -s $blue -d $green -j RETURN");
 107                         }
 108                         if ($defaultNetworks{'ORANGE_DEV'}){
 109                                 $defaultNetworks{'ORANGE_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'ORANGE_NETMASK'});
 110                                 $orange="$defaultNetworks{'ORANGE_ADDRESS'}/$defaultNetworks{'ORANGE_NETMASK'}";
 111                                 #set default rules for DMZ
 112                                 system ("iptables -A $CHAIN -s $orange -d $green -j RETURN");
 113                                 if ($defaultNetworks{'BLUE_DEV'}){
 114                                         system ("iptables -A $CHAIN -s $orange -d $blue -j RETURN");
 115                                 }
 116                         }
 117
 118                         &p2pblock;
 119                         system ("iptables -A $CHAIN -m state --state NEW -j ACCEPT");
 120                         system ("/usr/sbin/firewall-forward-policy");
 121                 }
 122         }
 123 }
 124 sub flush
 125 {
 126         system ("iptables -F FORWARDFW");
 127         system ("iptables -F INPUTFW");
 128 }
 129 sub preparerules
 130 {
 131         if (! -z  "${General::swroot}/forward/config"){
 132                 &buildrules(\%configfwdfw);
 133         }
 134         if (! -z  "${General::swroot}/forward/input"){
 135                 &buildrules(\%configinputfw);
 136         }
 137 }
 138 sub buildrules
 139 {
 140         my $hash=shift;
 141         my $STAG;
 142         foreach my $key (sort {$a <=> $b} keys %$hash){
 143                 $STAG='';
 144                 if($$hash{$key}[2] eq 'ON'){
 145                         #get source ip's
 146                         if ($$hash{$key}[3] eq 'cust_grp_src'){
 147                                 foreach my $grp (sort {$a <=> $b} keys %customgrp){
 148                                                 if($customgrp{$grp}[0] eq $$hash{$key}[4]){
 149                                                 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"src");
 150                                         }
 151                                 }
 152                         }else{
 153                                 &get_address($$hash{$key}[3],$$hash{$key}[4],"src");
 154                         }
 155                         #get target ip's
 156                         if ($$hash{$key}[5] eq 'cust_grp_tgt'){
 157                                 foreach my $grp (sort {$a <=> $b} keys %customgrp){
 158                                         if($customgrp{$grp}[0] eq $$hash{$key}[6]){
 159                                                 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"tgt");
 160                                         }
 161                                 }
 162                         }elsif($$hash{$key}[5] eq 'ipfire'){
 163
 164                                 if($$hash{$key}[6] eq 'Default IP'){
 165                                         open(FILE, "/var/ipfire/red/local-ipaddress") or die 'Unable to open config file.';
 166                                         $targethash{$key}[0]= <FILE>;
 167                                         close(FILE);
 168                                 }else{
 169                                         foreach my $alias (sort keys %aliases){
 170                                                 if ($$hash{$key}[6] eq $alias){
 171                                                         $targethash{$key}[0]=$aliases{$alias}{'IPT'};
 172                                                 }
 173                                         }
 174                                 }
 175                         }else{
 176                                 &get_address($$hash{$key}[5],$$hash{$key}[6],"tgt");
 177                         }
 178                         ##get source prot and port
 179                         $SRC_TGT='SRC';
 180                         $SPROT = &get_prot($hash,$key);
 181                         $SPORT = &get_port($hash,$key);
 182                         $SRC_TGT='';
 183
 184                         ##get target prot and port
 185                         $DPROT=&get_prot($hash,$key);
 186
 187                         if ($DPROT eq ''){$DPROT=' ';}
 188                         @DPROT=split(",",$DPROT);
 189
 190                         #get time if defined
 191                         if($$hash{$key}[18] eq 'ON'){
 192                                 if($$hash{$key}[19] ne ''){push (@timeframe,"Mon");}
 193                                 if($$hash{$key}[20] ne ''){push (@timeframe,"Tue");}
 194                                 if($$hash{$key}[21] ne ''){push (@timeframe,"Wed");}
 195                                 if($$hash{$key}[22] ne ''){push (@timeframe,"Thu");}
 196                                 if($$hash{$key}[23] ne ''){push (@timeframe,"Fri");}
 197                                 if($$hash{$key}[24] ne ''){push (@timeframe,"Sat");}
 198                                 if($$hash{$key}[25] ne ''){push (@timeframe,"Sun");}
 199                                 $TIME=join(",",@timeframe);
 200                                 $TIMEFROM="--timestart $$hash{$key}[26] ";
 201                                 $TIMETILL="--timestop $$hash{$key}[27] ";
 202                                 $TIME="-m time --weekdays $TIME $TIMEFROM $TIMETILL";
 203                         }
 204                         if ($MODE eq '1'){
 205                                 print "NR:$key ";
 206                                 foreach my $i (0 .. $#{$$hash{$key}}){
 207                                         print "$i: $$hash{$key}[$i]  ";
 208                                 }
 209                                 print "\n";
 210                                 print"##################################\n";
 211                                 #print rules to console
 212                                 foreach my $DPROT (@DPROT){
 213                                         $DPORT = &get_port($hash,$key,$DPROT);
 214                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 215                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 216                                         foreach my $a (sort keys %sourcehash){
 217                                                 foreach my $b (sort keys %targethash){
 218                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none' || $sourcehash{$a}[0] eq '0.0.0.0/0.0.0.0'){
 219                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 220                                                                         if(substr($sourcehash{$a}[0], 3, 3) ne 'mac'){ $STAG="-s";}
 221                                                                         if ($$hash{$key}[17] eq 'ON'){
 222                                                                                 print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG\n";
 223                                                                         }
 224                                                                         print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]\n";
 225                                                                 }
 226                                                         }
 227                                                 }
 228                                         }
 229                                         print"\n";
 230                                 }
 231                         }elsif($MODE eq '0'){
 232                                 foreach my $DPROT (@DPROT){
 233                                         $DPORT = &get_port($hash,$key,$DPROT);
 234                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 235                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 236                                         foreach my $a (sort keys %sourcehash){
 237                                                 foreach my $b (sort keys %targethash){
 238                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none' || $sourcehash{$a}[0] eq '0.0.0.0/0.0.0.0'){
 239                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 240                                                                         if(substr($sourcehash{$a}[0], 3, 3) ne 'mac'){ $STAG="-s";}
 241                                                                         if ($$hash{$key}[17] eq 'ON'){
 242                                                                                 system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG");
 243                                                                         }
 244                                                                         system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]");
 245                                                                 }
 246                                                         }
 247                                                 }
 248                                         }
 249                                 }
 250                         }
 251                 }
 252                 %sourcehash=();
 253                 %targethash=();
 254                 undef $TIME;
 255                 undef $TIMEFROM;
 256                 undef $TIMETILL;
 257         }
 258 }
 259 sub p2pblock
 260 {
 261         my $P2PSTRING;
 262         my $DO;
 263         open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile";
 264         @p2ps = <FILE>;
 265         close FILE;
 266         my $CMD = "-m ipp2p";
 267         foreach my $p2pentry (sort @p2ps) {
 268                 my @p2pline = split( /\;/, $p2pentry );
 269                 if ( $fwdfwsettings{'POLICY'} eq 'MODE1' ) {
 270                         $DO = "ACCEPT";
 271                         if ("$p2pline[2]" eq "on") {
 272                                 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 273                         }
 274                 }else {
 275                         $DO = "RETURN";
 276                         if ("$p2pline[2]" eq "off") {
 277                                 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 278                         }
 279                 }
 280         }
 281         if ($MODE eq 1){
 282                 if($P2PSTRING){
 283                         print"/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO\n";
 284                 }
 285         }else{
 286                 if($P2PSTRING){
 287                         system("/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO");
 288                 }
 289         }
 290 }
 291
 292 sub get_address
 293 {
 294         my $base=shift; #source of checking ($configfwdfw{$key}[x] or groupkey
 295         my $base2=shift;
 296         my $type=shift; #src or tgt
 297         my $hash;
 298         if ($type eq 'src'){
 299                 $hash=\%sourcehash;
 300         }else{
 301                 $hash=\%targethash;
 302         }
 303         my $key = &General::findhasharraykey($hash);
 304         if($base eq 'src_addr' || $base eq 'tgt_addr' ){
 305                 if (&General::validmac($base2)){
 306                         $$hash{$key}[0] = "-m mac --mac-source $base2";
 307                 }else{
 308                         $$hash{$key}[0] = $base2;
 309                 }
 310         }elsif($base eq 'std_net_src' || $base eq 'std_net_tgt' || $base eq 'Standard Network'){
 311                 $$hash{$key}[0]=&fwlib::get_std_net_ip($base2);
 312         }elsif($base eq 'cust_net_src' || $base eq 'cust_net_tgt' || $base eq 'Custom Network'){
 313                 $$hash{$key}[0]=&fwlib::get_net_ip($base2);
 314         }elsif($base eq 'cust_host_src' || $base eq 'cust_host_tgt' || $base eq 'Custom Host'){
 315                 $$hash{$key}[0]=&fwlib::get_host_ip($base2,$type);
 316         }elsif($base eq 'ovpn_net_src' || $base eq 'ovpn_net_tgt' || $base eq 'OpenVPN static network'){
 317                 $$hash{$key}[0]=&fwlib::get_ovpn_net_ip($base2,1);
 318         }elsif($base eq 'ovpn_host_src' ||$base eq 'ovpn_host_tgt' || $base eq 'OpenVPN static host'){
 319                 $$hash{$key}[0]=&fwlib::get_ovpn_host_ip($base2,33);
 320         }elsif($base eq 'ovpn_n2n_src' ||$base eq 'ovpn_n2n_tgt' || $base eq 'OpenVPN N-2-N'){
 321                 $$hash{$key}[0]=&fwlib::get_ovpn_n2n_ip($base2,27);
 322         }elsif($base eq 'ipsec_net_src' || $base eq 'ipsec_net_tgt' || $base eq 'IpSec Network'){
 323                 $$hash{$key}[0]=&fwlib::get_ipsec_net_ip($base2,11);
 324         }
 325 }
 326 sub get_prot
 327 {
 328         my $hash=shift;
 329         my $key=shift;
 330         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 331                 if ($$hash{$key}[10] ne ''){
 332                         return"$$hash{$key}[8]";
 333                 }elsif($$hash{$key}[9] ne ''){
 334                         return"$$hash{$key}[8]";
 335                 }else{
 336                         return "$$hash{$key}[8]";
 337                 }
 338         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 339                 if ($$hash{$key}[14] eq 'TGT_PORT'){
 340                         if ($$hash{$key}[15] ne ''){
 341                                 return "$$hash{$key}[12]";
 342                         }elsif($$hash{$key}[13] ne ''){
 343                                 return "$$hash{$key}[12]";
 344                         }else{
 345                                 return "$$hash{$key}[12]";
 346                         }
 347                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 348                         return &fwlib::get_srv_prot($$hash{$key}[15]);
 349
 350                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 351                         return &fwlib::get_srvgrp_prot($$hash{$key}[15]);
 352                 }
 353         }
 354 }
 355 sub get_port
 356 {
 357         my $hash=shift;
 358         my $key=shift;
 359         my $prot=shift;
 360         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 361                 if ($$hash{$key}[10] ne ''){
 362                         $$hash{$key}[10] =~ s/\|/,/g;
 363                         if(index($$hash{$key}[10],",") > 0){
 364                                 return "-m multiport --sport $$hash{$key}[10] ";
 365                         }else{
 366                                 return "--sport $$hash{$key}[10] ";
 367                         }
 368                 }elsif($$hash{$key}[9] ne '' && $$hash{$key}[9] ne 'All ICMP-Types'){
 369                         return "--icmp-type $$hash{$key}[9] ";
 370                 }elsif($$hash{$key}[9] eq 'All ICMP-Types'){
 371                         return;
 372                 }
 373         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 374
 375                 if($$hash{$key}[14] eq 'TGT_PORT'){
 376                         if ($$hash{$key}[15] ne ''){
 377                                 $$hash{$key}[15] =~ s/\|/,/g;
 378                                 if(index($$hash{$key}[15],",") > 0){
 379                                         return "-m multiport --dport $$hash{$key}[15] ";
 380                                 }else{
 381                                         return "--dport $$hash{$key}[15] ";
 382                                 }
 383                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] ne 'All ICMP-Types'){
 384                                 return "--icmp-type $$hash{$key}[13] ";
 385                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] eq 'All ICMP-Types'){
 386                                 return;
 387                         }
 388                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 389                         if ($prot ne 'ICMP'){
 390                                 return "--dport ".&fwlib::get_srv_port($$hash{$key}[15],1,$prot);
 391                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] ne 'All ICMP-Types'){
 392                                 return "--icmp-type ".&fwlib::get_srv_port($$hash{$key}[15],3,$prot);
 393                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] eq 'All ICMP-Types'){
 394                                 return;
 395                         }
 396                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 397                         if      ($prot ne 'ICMP'){
 398                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 399                         }
 400                         elsif($prot eq 'ICMP'){
 401                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 402                         }
 403                 }
 404         }
 405 }