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 use Time::Local;
  29 no warnings 'uninitialized';
  30
  31 # enable only the following on debugging purpose
  32 #use warnings;
  33 #use CGI::Carp 'fatalsToBrowser';
  34
  35 my %fwdfwsettings=();
  36 my %defaultNetworks=();
  37 my %configfwdfw=();
  38 my %color=();
  39 my %icmptypes=();
  40 my %ovpnSettings=();
  41 my %customgrp=();
  42 our %sourcehash=();
  43 our %targethash=();
  44 my @timeframe=();
  45 my %configinputfw=();
  46 my %configoutgoingfw=();
  47 my %configdmzfw=();
  48 my %aliases=();
  49 my @DPROT=();
  50 my @p2ps=();
  51 require '/var/ipfire/general-functions.pl';
  52 require "${General::swroot}/lang.pl";
  53 require "${General::swroot}/forward/bin/firewall-lib.pl";
  54
  55 my $configdmz           = "${General::swroot}/forward/dmz";
  56 my $configfwdfw         = "${General::swroot}/forward/config";
  57 my $configinput     = "${General::swroot}/forward/input";
  58 my $configoutgoing  = "${General::swroot}/forward/outgoing";
  59 my $p2pfile                     = "${General::swroot}/forward/p2protocols";
  60 my $configgrp           = "${General::swroot}/fwhosts/customgroups";
  61 my $netsettings         = "${General::swroot}/ethernet/settings";
  62 my $errormessage='';
  63 my $orange;
  64 my $green;
  65 my $blue;
  66 my ($TYPE,$PROT,$SPROT,$DPROT,$SPORT,$DPORT,$TIME,$TIMEFROM,$TIMETILL,$SRC_TGT);
  67 my $CHAIN="FORWARDFW";
  68
  69
  70 &General::readhash("${General::swroot}/forward/settings", \%fwdfwsettings);
  71 &General::readhash("$netsettings", \%defaultNetworks);
  72 &General::readhasharray($configdmz, \%configdmzfw);
  73 &General::readhasharray($configfwdfw, \%configfwdfw);
  74 &General::readhasharray($configinput, \%configinputfw);
  75 &General::readhasharray($configoutgoing, \%configoutgoingfw);
  76 &General::readhasharray($configgrp, \%customgrp);
  77 &General::get_aliases(\%aliases);
  78
  79 ################################
  80 #    DEBUG/TEST                #
  81 ################################
  82 my $MODE=1;     # 0 - normal operation
  83                                 # 1 - print configline and rules to console
  84                                 #
  85 ################################
  86 my $param=shift;
  87
  88 if($param eq 'flush'){
  89         if ($MODE eq '1'){
  90                 print " Flushing chains...\n";
  91         }
  92         &flush;
  93 }else{
  94         if ($MODE eq '1'){
  95                 print " Flushing chains...\n";
  96         }
  97         &flush;
  98         if ($MODE eq '1'){
  99                 print " Preparing rules...\n";
 100         }
 101         &preparerules;
 102         if($MODE eq '0'){
 103                 if ($fwdfwsettings{'POLICY'} eq 'MODE1'){
 104                         &p2pblock;
 105                         system ("/usr/sbin/firewall-policy");
 106                 }elsif($fwdfwsettings{'POLICY'} eq 'MODE2'){
 107                         $defaultNetworks{'GREEN_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'GREEN_NETMASK'});
 108                         $green="$defaultNetworks{'GREEN_ADDRESS'}/$defaultNetworks{'GREEN_NETMASK'}";
 109                         if ($defaultNetworks{'BLUE_DEV'}){
 110                                 $defaultNetworks{'BLUE_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'BLUE_NETMASK'});
 111                                 $blue="$defaultNetworks{'BLUE_ADDRESS'}/$defaultNetworks{'BLUE_NETMASK'}";
 112                                 #set default rules for BLUE
 113                                 system ("iptables -A $CHAIN -s $blue -d $green -j RETURN");
 114                         }
 115                         if ($defaultNetworks{'ORANGE_DEV'}){
 116                                 $defaultNetworks{'ORANGE_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'ORANGE_NETMASK'});
 117                                 $orange="$defaultNetworks{'ORANGE_ADDRESS'}/$defaultNetworks{'ORANGE_NETMASK'}";
 118                                 #set default rules for DMZ
 119                                 system ("iptables -A $CHAIN -s $orange -d $green -j RETURN");
 120                                 if ($defaultNetworks{'BLUE_DEV'}){
 121                                         system ("iptables -A $CHAIN -s $orange -d $blue -j RETURN");
 122                                 }
 123                         }
 124                         &p2pblock;
 125                         system ("iptables -A $CHAIN -m state --state NEW -j ACCEPT");
 126                         system ("/usr/sbin/firewall-policy");
 127                 }
 128         }
 129 }
 130 sub flush
 131 {
 132         system ("iptables -F FORWARDFW");
 133         system ("iptables -F INPUTFW");
 134         system ("iptables -F OUTGOINGFW");
 135 }
 136 sub preparerules
 137 {
 138         if (! -z  "${General::swroot}/forward/dmz"){
 139                 &buildrules(\%configdmzfw);
 140         }
 141         if (! -z  "${General::swroot}/forward/config"){
 142                 &buildrules(\%configfwdfw);
 143         }
 144         if (! -z  "${General::swroot}/forward/input"){
 145                 &buildrules(\%configinputfw);
 146         }
 147         if (! -z  "${General::swroot}/forward/outgoing"){
 148                 &buildrules(\%configoutgoingfw);
 149         }
 150 }
 151 sub buildrules
 152 {
 153         my $hash=shift;
 154         my $STAG;
 155         foreach my $key (sort {$a <=> $b} keys %$hash){
 156                 $STAG='';
 157                 if($$hash{$key}[2] eq 'ON'){
 158                         #get source ip's
 159                         if ($$hash{$key}[3] eq 'cust_grp_src'){
 160                                 foreach my $grp (sort {$a <=> $b} keys %customgrp){
 161                                                 if($customgrp{$grp}[0] eq $$hash{$key}[4]){
 162                                                 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"src");
 163                                         }
 164                                 }
 165                         }else{
 166                                 &get_address($$hash{$key}[3],$$hash{$key}[4],"src");
 167                         }
 168                         #get target ip's
 169                         if ($$hash{$key}[5] eq 'cust_grp_tgt'){
 170                                 foreach my $grp (sort {$a <=> $b} keys %customgrp){
 171                                         if($customgrp{$grp}[0] eq $$hash{$key}[6]){
 172                                                 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"tgt");
 173                                         }
 174                                 }
 175                         }elsif($$hash{$key}[5] eq 'ipfire'){
 176                                 if($$hash{$key}[6] eq 'Default IP'){
 177                                         open(FILE, "/var/ipfire/red/local-ipaddress") or die 'Unable to open config file.';
 178                                         $targethash{$key}[0]= <FILE>;
 179                                         close(FILE);
 180                                 }else{
 181                                         foreach my $alias (sort keys %aliases){
 182                                                 if ($$hash{$key}[6] eq $alias){
 183                                                         $targethash{$key}[0]=$aliases{$alias}{'IPT'};
 184                                                 }
 185                                         }
 186                                 }
 187                         }else{
 188                                 &get_address($$hash{$key}[5],$$hash{$key}[6],"tgt");
 189                         }
 190                         ##get source prot and port
 191                         $SRC_TGT='SRC';
 192                         $SPROT = &get_prot($hash,$key);
 193                         $SPORT = &get_port($hash,$key);
 194                         $SRC_TGT='';
 195
 196                         ##get target prot and port
 197                         $DPROT=&get_prot($hash,$key);
 198
 199                         if ($DPROT eq ''){$DPROT=' ';}
 200                         @DPROT=split(",",$DPROT);
 201
 202                         #get time if defined
 203                         if($$hash{$key}[18] eq 'ON'){
 204                                 my ($time1,$time2,$daylight);
 205                                 my $daylight=$$hash{$key}[28];
 206                                 $time1=&get_time($$hash{$key}[26],$daylight);
 207                                 $time2=&get_time($$hash{$key}[27],$daylight);
 208                                 if($$hash{$key}[19] ne ''){push (@timeframe,"Mon");}
 209                                 if($$hash{$key}[20] ne ''){push (@timeframe,"Tue");}
 210                                 if($$hash{$key}[21] ne ''){push (@timeframe,"Wed");}
 211                                 if($$hash{$key}[22] ne ''){push (@timeframe,"Thu");}
 212                                 if($$hash{$key}[23] ne ''){push (@timeframe,"Fri");}
 213                                 if($$hash{$key}[24] ne ''){push (@timeframe,"Sat");}
 214                                 if($$hash{$key}[25] ne ''){push (@timeframe,"Sun");}
 215                                 $TIME=join(",",@timeframe);
 216
 217                                 $TIMEFROM="--timestart $time1 ";
 218                                 $TIMETILL="--timestop $time2 ";
 219                                 $TIME="-m time --weekdays $TIME $TIMEFROM $TIMETILL";
 220                         }
 221                         if ($MODE eq '1'){
 222                                 print "NR:$key ";
 223                                 foreach my $i (0 .. $#{$$hash{$key}}){
 224                                         print "$i: $$hash{$key}[$i]  ";
 225                                 }
 226                                 print "\n";
 227                                 print"##################################\n";
 228                                 #print rules to console
 229                                 foreach my $DPROT (@DPROT){
 230                                         $DPORT = &get_port($hash,$key,$DPROT);
 231                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 232                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 233                                         foreach my $a (sort keys %sourcehash){
 234                                                 foreach my $b (sort keys %targethash){
 235                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none' || $sourcehash{$a}[0] eq '0.0.0.0/0.0.0.0'){
 236                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 237                                                                         if(substr($sourcehash{$a}[0], 3, 3) ne 'mac' && $sourcehash{$a}[0] ne ''){ $STAG="-s";}
 238                                                                         if(substr($DPORT, 2, 4) eq 'icmp'){
 239                                                                                 my @icmprule= split(",",substr($DPORT, 12,));
 240                                                                                 foreach (@icmprule){
 241                                                                                         if ($$hash{$key}[17] eq 'ON'){
 242                                                                                                 print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] --icmp-type $_ $TIME -j LOG\n";
 243                                                                                         }
 244                                                                                         print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] --icmp-type $_ $TIME -j $$hash{$key}[0]\n";
 245                                                                                 }
 246                                                                         }else{
 247                                                                                 if ($$hash{$key}[17] eq 'ON'){
 248                                                                                         print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG\n";
 249                                                                                 }
 250                                                                                 print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]\n";
 251                                                                         }
 252                                                                 }
 253                                                         }
 254                                                 }
 255                                         }
 256                                         print"\n";
 257                                 }
 258                         }elsif($MODE eq '0'){
 259                                 foreach my $DPROT (@DPROT){
 260                                         $DPORT = &get_port($hash,$key,$DPROT);
 261                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 262                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 263                                         foreach my $a (sort keys %sourcehash){
 264                                                 foreach my $b (sort keys %targethash){
 265                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none' || $sourcehash{$a}[0] eq '0.0.0.0/0.0.0.0'){
 266                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 267                                                                         if(substr($sourcehash{$a}[0], 3, 3) ne 'mac' && $sourcehash{$a}[0] ne ''){ $STAG="-s";}
 268                                                                         if(substr($DPORT, 2, 4) eq 'icmp'){
 269                                                                                 my @icmprule= split(",",substr($DPORT, 12,));
 270                                                                                 foreach (@icmprule){
 271                                                                                         if ($$hash{$key}[17] eq 'ON'){
 272                                                                                                 system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] -- icmp-type $_ $TIME -j LOG");
 273                                                                                         }
 274                                                                                         system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] --icmp-type $_ $TIME -j $$hash{$key}[0]");
 275                                                                                 }
 276                                                                         }else{
 277                                                                                 if ($$hash{$key}[17] eq 'ON'){
 278                                                                                         system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG");
 279                                                                                 }
 280                                                                                 system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]");
 281                                                                         }
 282                                                                 }
 283                                                         }
 284                                                 }
 285                                         }
 286                                 }
 287                         }
 288                 }
 289                 %sourcehash=();
 290                 %targethash=();
 291                 undef $TIME;
 292                 undef $TIMEFROM;
 293                 undef $TIMETILL;
 294         }
 295 }
 296 sub get_time
 297 {
 298         my $val=shift;
 299         my $val1=shift;
 300         my $time;
 301         my $minutes;
 302         my $ruletime;
 303         $minutes = &utcmin($val);
 304         $ruletime = $minutes + &time_get_utc($val);
 305         if ($ruletime < 0){$ruletime +=1440;}
 306         if ($ruletime > 1440){$ruletime -=1440;}
 307         $time=sprintf "%02d:%02d", $ruletime / 60, $ruletime % 60;
 308         return $time;
 309 }
 310 sub time_get_utc
 311 {
 312         # Calculates the UTCtime from a given time
 313         my $val=shift;
 314         my @localtime=localtime(time);
 315         my @gmtime=gmtime(time);
 316         my $diff = ($gmtime[2]*60+$gmtime[1]%60)-($localtime[2]*60+$localtime[1]%60);
 317         return $diff;
 318 }
 319 sub utcmin
 320 {
 321         my $ruletime=shift;
 322         my ($hrs,$min) = split(":",$ruletime);
 323         my $newtime = $hrs*60+$min;
 324         return $newtime;
 325 }
 326 sub p2pblock
 327 {
 328         my $P2PSTRING;
 329         my $DO;
 330         open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile";
 331         @p2ps = <FILE>;
 332         close FILE;
 333         my $CMD = "-m ipp2p";
 334         foreach my $p2pentry (sort @p2ps) {
 335                 my @p2pline = split( /\;/, $p2pentry );
 336                 if ( $fwdfwsettings{'POLICY'} eq 'MODE1' ) {
 337                         $DO = "ACCEPT";
 338                         if ("$p2pline[2]" eq "on") {
 339                                 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 340                         }
 341                 }else {
 342                         $DO = "RETURN";
 343                         if ("$p2pline[2]" eq "off") {
 344                                 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 345                         }
 346                 }
 347         }
 348         if ($MODE eq 1){
 349                 if($P2PSTRING){
 350                         print"/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO\n";
 351                 }
 352         }else{
 353                 if($P2PSTRING){
 354                         system("/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO");
 355                 }
 356         }
 357 }
 358
 359 sub get_address
 360 {
 361         my $base=shift; #source of checking ($configfwdfw{$key}[x] or groupkey
 362         my $base2=shift;
 363         my $type=shift; #src or tgt
 364         my $hash;
 365         if ($type eq 'src'){
 366                 $hash=\%sourcehash;
 367         }else{
 368                 $hash=\%targethash;
 369         }
 370         my $key = &General::findhasharraykey($hash);
 371         if($base eq 'src_addr' || $base eq 'tgt_addr' ){
 372                 if (&General::validmac($base2)){
 373                         $$hash{$key}[0] = "-m mac --mac-source $base2";
 374                 }else{
 375                         $$hash{$key}[0] = $base2;
 376                 }
 377         }elsif($base eq 'std_net_src' || $base eq 'std_net_tgt' || $base eq 'Standard Network'){
 378                 $$hash{$key}[0]=&fwlib::get_std_net_ip($base2);
 379         }elsif($base eq 'cust_net_src' || $base eq 'cust_net_tgt' || $base eq 'Custom Network'){
 380                 $$hash{$key}[0]=&fwlib::get_net_ip($base2);
 381         }elsif($base eq 'cust_host_src' || $base eq 'cust_host_tgt' || $base eq 'Custom Host'){
 382                 $$hash{$key}[0]=&fwlib::get_host_ip($base2,$type);
 383         }elsif($base eq 'ovpn_net_src' || $base eq 'ovpn_net_tgt' || $base eq 'OpenVPN static network'){
 384                 $$hash{$key}[0]=&fwlib::get_ovpn_net_ip($base2,1);
 385         }elsif($base eq 'ovpn_host_src' ||$base eq 'ovpn_host_tgt' || $base eq 'OpenVPN static host'){
 386                 $$hash{$key}[0]=&fwlib::get_ovpn_host_ip($base2,33);
 387         }elsif($base eq 'ovpn_n2n_src' ||$base eq 'ovpn_n2n_tgt' || $base eq 'OpenVPN N-2-N'){
 388                 $$hash{$key}[0]=&fwlib::get_ovpn_n2n_ip($base2,27);
 389         }elsif($base eq 'ipsec_net_src' || $base eq 'ipsec_net_tgt' || $base eq 'IpSec Network'){
 390                 $$hash{$key}[0]=&fwlib::get_ipsec_net_ip($base2,11);
 391         }
 392 }
 393 sub get_prot
 394 {
 395         my $hash=shift;
 396         my $key=shift;
 397         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 398                 if ($$hash{$key}[10] ne ''){
 399                         return"$$hash{$key}[8]";
 400                 }elsif($$hash{$key}[9] ne ''){
 401                         return"$$hash{$key}[8]";
 402                 }else{
 403                         return "$$hash{$key}[8]";
 404                 }
 405         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 406                 if ($$hash{$key}[14] eq 'TGT_PORT'){
 407                         if ($$hash{$key}[15] ne ''){
 408                                 return "$$hash{$key}[12]";
 409                         }elsif($$hash{$key}[13] ne ''){
 410                                 return "$$hash{$key}[12]";
 411                         }else{
 412                                 return "$$hash{$key}[12]";
 413                         }
 414                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 415                         return &fwlib::get_srv_prot($$hash{$key}[15]);
 416
 417                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 418                         return &fwlib::get_srvgrp_prot($$hash{$key}[15]);
 419                 }
 420         }
 421 }
 422 sub get_port
 423 {
 424         my $hash=shift;
 425         my $key=shift;
 426         my $prot=shift;
 427         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 428                 if ($$hash{$key}[10] ne ''){
 429                         $$hash{$key}[10] =~ s/\|/,/g;
 430                         if(index($$hash{$key}[10],",") > 0){
 431                                 return "-m multiport --sport $$hash{$key}[10] ";
 432                         }else{
 433                                 return "--sport $$hash{$key}[10] ";
 434                         }
 435                 }elsif($$hash{$key}[9] ne '' && $$hash{$key}[9] ne 'All ICMP-Types'){
 436                         return "--icmp-type $$hash{$key}[9] ";
 437                 }elsif($$hash{$key}[9] eq 'All ICMP-Types'){
 438                         return;
 439                 }
 440         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 441
 442                 if($$hash{$key}[14] eq 'TGT_PORT'){
 443                         if ($$hash{$key}[15] ne ''){
 444                                 $$hash{$key}[15] =~ s/\|/,/g;
 445                                 if(index($$hash{$key}[15],",") > 0){
 446                                         return "-m multiport --dport $$hash{$key}[15] ";
 447                                 }else{
 448                                         return "--dport $$hash{$key}[15] ";
 449                                 }
 450                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] ne 'All ICMP-Types'){
 451                                 return "--icmp-type $$hash{$key}[13] ";
 452                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] eq 'All ICMP-Types'){
 453                                 return;
 454                         }
 455                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 456                         if ($prot ne 'ICMP'){
 457                                 return "--dport ".&fwlib::get_srv_port($$hash{$key}[15],1,$prot);
 458                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] ne 'All ICMP-Types'){
 459                                 return "--icmp-type ".&fwlib::get_srv_port($$hash{$key}[15],3,$prot);
 460                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] eq 'All ICMP-Types'){
 461                                 return;
 462                         }
 463                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 464                         if      ($prot ne 'ICMP'){
 465                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 466                         }
 467                         elsif($prot eq 'ICMP'){
 468                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 469                         }
 470                 }
 471         }
 472 }