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