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 %configoutgoingfw=();
  46 my %configdmzfw=();
  47 my %aliases=();
  48 my @DPROT=();
  49 my @p2ps=();
  50 require '/var/ipfire/general-functions.pl';
  51 require "${General::swroot}/lang.pl";
  52 require "${General::swroot}/forward/bin/firewall-lib.pl";
  53
  54 my $configdmz           = "${General::swroot}/forward/dmz";
  55 my $configfwdfw         = "${General::swroot}/forward/config";
  56 my $configinput     = "${General::swroot}/forward/input";
  57 my $configoutgoing  = "${General::swroot}/forward/outgoing";
  58 my $p2pfile                     = "${General::swroot}/forward/p2protocols";
  59 my $configgrp           = "${General::swroot}/fwhosts/customgroups";
  60 my $netsettings         = "${General::swroot}/ethernet/settings";
  61 my $errormessage='';
  62 my $orange;
  63 my $green;
  64 my $blue;
  65 my ($TYPE,$PROT,$SPROT,$DPROT,$SPORT,$DPORT,$TIME,$TIMEFROM,$TIMETILL,$SRC_TGT);
  66 my $CHAIN="FORWARDFW";
  67
  68
  69 &General::readhash("${General::swroot}/forward/settings", \%fwdfwsettings);
  70 &General::readhash("$netsettings", \%defaultNetworks);
  71 &General::readhasharray($configdmz, \%configdmzfw);
  72 &General::readhasharray($configfwdfw, \%configfwdfw);
  73 &General::readhasharray($configinput, \%configinputfw);
  74 &General::readhasharray($configoutgoing, \%configoutgoingfw);
  75 &General::readhasharray($configgrp, \%customgrp);
  76 &General::get_aliases(\%aliases);
  77
  78 ################################
  79 #    DEBUG/TEST                #
  80 ################################
  81 my $MODE=1;     # 0 - normal operation
  82                                 # 1 - print configline and rules to console
  83                                 #
  84 ################################
  85 my $param=shift;
  86
  87 if($param eq 'flush'){
  88         if ($MODE eq '1'){
  89                 print " Flushing chains...\n";
  90         }
  91         &flush;
  92 }else{
  93         if ($MODE eq '1'){
  94                 print " Flushing chains...\n";
  95         }
  96         &flush;
  97         if ($MODE eq '1'){
  98                 print " Preparing rules...\n";
  99         }
 100         &preparerules;
 101         if($MODE eq '0'){
 102                 if ($fwdfwsettings{'POLICY'} eq 'MODE1'){
 103                         &p2pblock;
 104                         system ("/usr/sbin/firewall-policy");
 105                 }elsif($fwdfwsettings{'POLICY'} eq 'MODE2'){
 106                         $defaultNetworks{'GREEN_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'GREEN_NETMASK'});
 107                         $green="$defaultNetworks{'GREEN_ADDRESS'}/$defaultNetworks{'GREEN_NETMASK'}";
 108                         if ($defaultNetworks{'BLUE_DEV'}){
 109                                 $defaultNetworks{'BLUE_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'BLUE_NETMASK'});
 110                                 $blue="$defaultNetworks{'BLUE_ADDRESS'}/$defaultNetworks{'BLUE_NETMASK'}";
 111                                 #set default rules for BLUE
 112                                 system ("iptables -A $CHAIN -s $blue -d $green -j RETURN");
 113                         }
 114                         if ($defaultNetworks{'ORANGE_DEV'}){
 115                                 $defaultNetworks{'ORANGE_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'ORANGE_NETMASK'});
 116                                 $orange="$defaultNetworks{'ORANGE_ADDRESS'}/$defaultNetworks{'ORANGE_NETMASK'}";
 117                                 #set default rules for DMZ
 118                                 system ("iptables -A $CHAIN -s $orange -d $green -j RETURN");
 119                                 if ($defaultNetworks{'BLUE_DEV'}){
 120                                         system ("iptables -A $CHAIN -s $orange -d $blue -j RETURN");
 121                                 }
 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($$hash{$key}[18] eq 'ON'){
 204                                 if($$hash{$key}[19] ne ''){push (@timeframe,"Mon");}
 205                                 if($$hash{$key}[20] ne ''){push (@timeframe,"Tue");}
 206                                 if($$hash{$key}[21] ne ''){push (@timeframe,"Wed");}
 207                                 if($$hash{$key}[22] ne ''){push (@timeframe,"Thu");}
 208                                 if($$hash{$key}[23] ne ''){push (@timeframe,"Fri");}
 209                                 if($$hash{$key}[24] ne ''){push (@timeframe,"Sat");}
 210                                 if($$hash{$key}[25] ne ''){push (@timeframe,"Sun");}
 211                                 $TIME=join(",",@timeframe);
 212                                 $TIMEFROM="--timestart $$hash{$key}[26] ";
 213                                 $TIMETILL="--timestop $$hash{$key}[27] ";
 214                                 $TIME="-m time --weekdays $TIME $TIMEFROM $TIMETILL";
 215                         }
 216                         if ($MODE eq '1'){
 217                                 print "NR:$key ";
 218                                 foreach my $i (0 .. $#{$$hash{$key}}){
 219                                         print "$i: $$hash{$key}[$i]  ";
 220                                 }
 221                                 print "\n";
 222                                 print"##################################\n";
 223                                 #print rules to console
 224                                 foreach my $DPROT (@DPROT){
 225                                         $DPORT = &get_port($hash,$key,$DPROT);
 226                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 227                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 228                                         foreach my $a (sort keys %sourcehash){
 229                                                 foreach my $b (sort keys %targethash){
 230                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none' || $sourcehash{$a}[0] eq '0.0.0.0/0.0.0.0'){
 231                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 232                                                                         if(substr($sourcehash{$a}[0], 3, 3) ne 'mac' && $sourcehash{$a}[0] ne ''){ $STAG="-s";}
 233                                                                         if ($$hash{$key}[17] eq 'ON'){
 234                                                                                 print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG\n";
 235                                                                         }
 236                                                                         print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]\n";
 237                                                                 }
 238                                                         }
 239                                                 }
 240                                         }
 241                                         print"\n";
 242                                 }
 243                         }elsif($MODE eq '0'){
 244                                 foreach my $DPROT (@DPROT){
 245                                         $DPORT = &get_port($hash,$key,$DPROT);
 246                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 247                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 248                                         foreach my $a (sort keys %sourcehash){
 249                                                 foreach my $b (sort keys %targethash){
 250                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none' || $sourcehash{$a}[0] eq '0.0.0.0/0.0.0.0'){
 251                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 252                                                                         if(substr($sourcehash{$a}[0], 3, 3) ne 'mac' && $sourcehash{$a}[0] ne ''){ $STAG="-s";}
 253                                                                         if ($$hash{$key}[17] eq 'ON'){
 254                                                                                 system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG");
 255                                                                         }
 256                                                                         system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]");
 257                                                                 }
 258                                                         }
 259                                                 }
 260                                         }
 261                                 }
 262                         }
 263                 }
 264                 %sourcehash=();
 265                 %targethash=();
 266                 undef $TIME;
 267                 undef $TIMEFROM;
 268                 undef $TIMETILL;
 269         }
 270 }
 271 sub p2pblock
 272 {
 273         my $P2PSTRING;
 274         my $DO;
 275         open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile";
 276         @p2ps = <FILE>;
 277         close FILE;
 278         my $CMD = "-m ipp2p";
 279         foreach my $p2pentry (sort @p2ps) {
 280                 my @p2pline = split( /\;/, $p2pentry );
 281                 if ( $fwdfwsettings{'POLICY'} eq 'MODE1' ) {
 282                         $DO = "ACCEPT";
 283                         if ("$p2pline[2]" eq "on") {
 284                                 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 285                         }
 286                 }else {
 287                         $DO = "RETURN";
 288                         if ("$p2pline[2]" eq "off") {
 289                                 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 290                         }
 291                 }
 292         }
 293         if ($MODE eq 1){
 294                 if($P2PSTRING){
 295                         print"/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO\n";
 296                 }
 297         }else{
 298                 if($P2PSTRING){
 299                         system("/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO");
 300                 }
 301         }
 302 }
 303
 304 sub get_address
 305 {
 306         my $base=shift; #source of checking ($configfwdfw{$key}[x] or groupkey
 307         my $base2=shift;
 308         my $type=shift; #src or tgt
 309         my $hash;
 310         if ($type eq 'src'){
 311                 $hash=\%sourcehash;
 312         }else{
 313                 $hash=\%targethash;
 314         }
 315         my $key = &General::findhasharraykey($hash);
 316         if($base eq 'src_addr' || $base eq 'tgt_addr' ){
 317                 if (&General::validmac($base2)){
 318                         $$hash{$key}[0] = "-m mac --mac-source $base2";
 319                 }else{
 320                         $$hash{$key}[0] = $base2;
 321                 }
 322         }elsif($base eq 'std_net_src' || $base eq 'std_net_tgt' || $base eq 'Standard Network'){
 323                 $$hash{$key}[0]=&fwlib::get_std_net_ip($base2);
 324         }elsif($base eq 'cust_net_src' || $base eq 'cust_net_tgt' || $base eq 'Custom Network'){
 325                 $$hash{$key}[0]=&fwlib::get_net_ip($base2);
 326         }elsif($base eq 'cust_host_src' || $base eq 'cust_host_tgt' || $base eq 'Custom Host'){
 327                 $$hash{$key}[0]=&fwlib::get_host_ip($base2,$type);
 328         }elsif($base eq 'ovpn_net_src' || $base eq 'ovpn_net_tgt' || $base eq 'OpenVPN static network'){
 329                 $$hash{$key}[0]=&fwlib::get_ovpn_net_ip($base2,1);
 330         }elsif($base eq 'ovpn_host_src' ||$base eq 'ovpn_host_tgt' || $base eq 'OpenVPN static host'){
 331                 $$hash{$key}[0]=&fwlib::get_ovpn_host_ip($base2,33);
 332         }elsif($base eq 'ovpn_n2n_src' ||$base eq 'ovpn_n2n_tgt' || $base eq 'OpenVPN N-2-N'){
 333                 $$hash{$key}[0]=&fwlib::get_ovpn_n2n_ip($base2,27);
 334         }elsif($base eq 'ipsec_net_src' || $base eq 'ipsec_net_tgt' || $base eq 'IpSec Network'){
 335                 $$hash{$key}[0]=&fwlib::get_ipsec_net_ip($base2,11);
 336         }
 337 }
 338 sub get_prot
 339 {
 340         my $hash=shift;
 341         my $key=shift;
 342         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 343                 if ($$hash{$key}[10] ne ''){
 344                         return"$$hash{$key}[8]";
 345                 }elsif($$hash{$key}[9] ne ''){
 346                         return"$$hash{$key}[8]";
 347                 }else{
 348                         return "$$hash{$key}[8]";
 349                 }
 350         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 351                 if ($$hash{$key}[14] eq 'TGT_PORT'){
 352                         if ($$hash{$key}[15] ne ''){
 353                                 return "$$hash{$key}[12]";
 354                         }elsif($$hash{$key}[13] ne ''){
 355                                 return "$$hash{$key}[12]";
 356                         }else{
 357                                 return "$$hash{$key}[12]";
 358                         }
 359                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 360                         return &fwlib::get_srv_prot($$hash{$key}[15]);
 361
 362                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 363                         return &fwlib::get_srvgrp_prot($$hash{$key}[15]);
 364                 }
 365         }
 366 }
 367 sub get_port
 368 {
 369         my $hash=shift;
 370         my $key=shift;
 371         my $prot=shift;
 372         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 373                 if ($$hash{$key}[10] ne ''){
 374                         $$hash{$key}[10] =~ s/\|/,/g;
 375                         if(index($$hash{$key}[10],",") > 0){
 376                                 return "-m multiport --sport $$hash{$key}[10] ";
 377                         }else{
 378                                 return "--sport $$hash{$key}[10] ";
 379                         }
 380                 }elsif($$hash{$key}[9] ne '' && $$hash{$key}[9] ne 'All ICMP-Types'){
 381                         return "--icmp-type $$hash{$key}[9] ";
 382                 }elsif($$hash{$key}[9] eq 'All ICMP-Types'){
 383                         return;
 384                 }
 385         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 386
 387                 if($$hash{$key}[14] eq 'TGT_PORT'){
 388                         if ($$hash{$key}[15] ne ''){
 389                                 $$hash{$key}[15] =~ s/\|/,/g;
 390                                 if(index($$hash{$key}[15],",") > 0){
 391                                         return "-m multiport --dport $$hash{$key}[15] ";
 392                                 }else{
 393                                         return "--dport $$hash{$key}[15] ";
 394                                 }
 395                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] ne 'All ICMP-Types'){
 396                                 return "--icmp-type $$hash{$key}[13] ";
 397                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] eq 'All ICMP-Types'){
 398                                 return;
 399                         }
 400                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 401                         if ($prot ne 'ICMP'){
 402                                 return "--dport ".&fwlib::get_srv_port($$hash{$key}[15],1,$prot);
 403                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] ne 'All ICMP-Types'){
 404                                 return "--icmp-type ".&fwlib::get_srv_port($$hash{$key}[15],3,$prot);
 405                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] eq 'All ICMP-Types'){
 406                                 return;
 407                         }
 408                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 409                         if      ($prot ne 'ICMP'){
 410                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 411                         }
 412                         elsif($prot eq 'ICMP'){
 413                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 414                         }
 415                 }
 416         }
 417 }