html/cgi-bin/guardian.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2014  IPFire Team  <info@ipfire.org>                          #
   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 use strict;
  23 use Locale::Country;
  24
  25 # enable only the following on debugging purpose
  26 use warnings;
  27 use CGI::Carp 'fatalsToBrowser';
  28
  29 require '/var/ipfire/general-functions.pl';
  30 require "${General::swroot}/lang.pl";
  31 require "${General::swroot}/header.pl";
  32
  33 #workaround to suppress a warning when a variable is used only once
  34 my @dummy = ( ${Header::colouryellow} );
  35 undef (@dummy);
  36
  37 my $string=();
  38 my $memory=();
  39 my @memory=();
  40 my @pid=();
  41 my @guardian=();
  42
  43 # Path to the guardian.ignore file.
  44 my $ignorefile ='/var/ipfire/guardian/guardian.ignore';
  45
  46 our %netsettings = ();
  47 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  48
  49 our %color = ();
  50 our %mainsettings = ();
  51 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  52 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  53
  54 # Pakfire meta file for owncloud.
  55 # (File exists when the addon is installed.)
  56 my $owncloud_meta = "/opt/pakfire/db/installed/meta-owncloud";
  57
  58 our %settings = ();
  59
  60 $settings{'ACTION'} = '';
  61
  62 $settings{'GUARDIAN_ENABLED'} = 'off';
  63 $settings{'GUARDIAN_ENABLE_SNORT'} = 'on';
  64 $settings{'GUARDIAN_ENABLE_SSH'} = 'on';
  65 $settings{'GUARDIAN_ENABLE_HTTPD'} = 'on';
  66 $settings{'GUARDIAN_LOGLEVEL'} = 'info';
  67 $settings{'GUARDIAN_BLOCKCOUNT'} = '3';
  68 $settings{'GUARDIAN_BLOCKTIME'} = '86400';
  69 $settings{'GUARDIAN_LOGFILE'} = '/var/log/guardian/guardian.log';
  70 $settings{'GUARDIAN_SNORT_ALERTFILE'} = '/var/log/snort/alert';
  71 $settings{'GUARDIAN_PRIORITY_LEVEL'} = '3';
  72
  73 # Default settings for owncloud if installed.
  74 if ( -e "$owncloud_meta") {
  75         $settings{'GUARDIAN_ENABLE_OWNCLOUD'} = 'off';
  76 }
  77
  78 my $errormessage = '';
  79
  80 &Header::showhttpheaders();
  81
  82 # Get GUI values.
  83 &Header::getcgihash(\%settings);
  84
  85 # Check if guardian is running and grab some stats.
  86 &daemonstats();
  87 my $pid = $pid[0];
  88
  89 ## Perform input checks and save settings.
  90 #
  91 if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
  92         # Check for valid blocktime.
  93         unless(($settings{'GUARDIAN_BLOCKTIME'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKTIME'} ne "0")) {
  94                         $errormessage = "$Lang::tr{'guardian invalid blocktime'}";
  95         }
  96
  97         # Check if the bloccount is valid.
  98         unless(($settings{'GUARDIAN_BLOCKCOUNT'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKCOUNT'} ne "0")) {
  99                         $errormessage = "$Lang::tr{'guardian invalid blockcount'}";
 100         }
 101
 102         # Check Logfile.
 103         unless($settings{'GUARDIAN_LOGFILE'} =~ /^[a-zA-Z0-9\.\/]+$/) {
 104                 $errormessage = "$Lang::tr{'guardian invalid logfile'}";
 105         }
 106
 107         # Check input for snort alert file.
 108         unless($settings{'GUARDIAN_SNORT_ALERTFILE'} =~ /^[a-zA-Z0-9\.\/]+$/) {
 109                 $errormessage = "$Lang::tr{'guardian invalid alertfile'}";
 110         }
 111
 112         # Only continue if no error message has been set.
 113         if($errormessage eq '') {
 114                 # Write configuration settings to file.
 115                 &General::writehash("${General::swroot}/guardian/settings", \%settings);
 116
 117                 # Update configuration files.
 118                 &BuildConfiguration();
 119         }
 120
 121 ## Add a new entry to the ignore file.
 122 #
 123 } elsif ($settings{'ACTION'} eq $Lang::tr{'add'}) {
 124
 125         # Check if any input has been performed.
 126         if ($settings{'NEW_IGNORE_ENTRY'} ne '') {
 127
 128                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 129                 if ((!&General::validip($settings{'NEW_IGNORE_ENTRY'})) && (!&General::validipandmask($settings{'NEW_IGNORE_ENTRY'}))) {
 130                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 131                 }
 132         } else {
 133                 $errormessage = "$Lang::tr{'guardian empty input'}";
 134         }
 135
 136         # Go further if there was no error.
 137         if ($errormessage eq '') {
 138                 my $new_entry = $settings{'NEW_IGNORE_ENTRY'};
 139
 140                 # Open file for appending the new entry.
 141                 open (FILE, ">>$ignorefile") or die "Unable to open $ignorefile for writing";
 142
 143                 # Write the new entry to the ignore file.
 144                 print FILE "$new_entry\n";
 145                 close(FILE);
 146         }
 147
 148         # Check if guardian is running.
 149         if ($pid > 0) {
 150                 # Call guardianctrl to perform a reload.
 151                 system("/usr/local/bin/guardianctrl reload &>/dev/null");
 152         }
 153
 154 ## Remove entry from ignore list.
 155 #
 156 } elsif ($settings{'ACTION'} eq $Lang::tr{'remove'}) {
 157         my $id = 0;
 158
 159         # Open ignorefile and read content.
 160         open(FILE, "<$ignorefile") or die "Unable to open $ignorefile.";
 161         my @current = <FILE>;
 162         close(FILE);
 163
 164         # Re-open ignorefile for writing.
 165         open(FILE, ">$ignorefile") or die "Unable to open $ignorefile for writing";
 166         flock FILE, 2;
 167
 168         # Read line by line from ignorefile and write them back except the line with the given ID.
 169         # So this line is missing in the new file and the entry has been deleted.
 170         foreach my $line (@current) {
 171                 $id++;
 172                 unless ($settings{'ID'} eq $id) {
 173                         print FILE "$line";
 174                 }
 175         }
 176         close(FILE);
 177
 178         # Check if guardian is running.
 179         if ($pid > 0) {
 180                 # Call guardianctrl to perform a reload.
 181                 system("/usr/local/bin/guardianctrl reload &>/dev/null");
 182         }
 183
 184 ## Block a user given address or subnet.
 185 #
 186 } elsif ($settings{'ACTION'} eq $Lang::tr{'block'}) {
 187
 188         # Assign some temporary variables used for input validation.
 189         my $input = $settings{'ADDRESS_BLOCK'};
 190         my $green = $netsettings{'GREEN_ADDRESS'};
 191         my $blue = $netsettings{'BLUE_ADDRESS'};
 192         my $orange = $netsettings{'ORANGE_ADDRESS'};
 193         my $red = $netsettings{'RED_ADDRESS'};
 194
 195         # Get gateway address.
 196         my $gateway = &General::get_gateway();
 197
 198         # Check if any input has been performed.
 199         if ($input eq '') {
 200                 $errormessage = "$Lang::tr{'guardian empty input'}";
 201         }
 202
 203         # Check if the given input is localhost (127.0.0.1).
 204         elsif ($input eq "127.0.0.1") {
 205                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 206         }
 207
 208         # Check if the given input is anywhere (0.0.0.0).
 209         elsif ($input eq "0.0.0.0") {
 210                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 211         }
 212
 213         # Check if the given input is one of the interface addresses or our gateway.
 214         elsif ($input eq "$green" || $input eq "$blue" || $input eq "$orange" || $input eq "$red" || $input eq "$gateway") {
 215                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 216         }
 217
 218         # Check if the given input is a valid IP address.
 219         elsif (!&General::validip($input)) {
 220                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 221         }
 222
 223         # Go further if there was no error.
 224         if ($errormessage eq '') {
 225                 my $block = $settings{'ADDRESS_BLOCK'};
 226
 227                 # Call helper to unblock address.
 228                 system("/usr/local/bin/guardianctrl block $block &>/dev/null");
 229         }
 230
 231 ## Unblock address or subnet.
 232 #
 233 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock'}) {
 234
 235         # Check if no empty input has been performed.
 236         if ($settings{'ADDRESS_UNBLOCK'} ne '') {
 237
 238                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 239                 if ((!&General::validip($settings{'ADDRESS_UNBLOCK'})) && (!&General::validipandmask($settings{'ADDRESS_UNBLOCK'}))) {
 240                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 241                 }
 242
 243         } else {
 244                 $errormessage = "$Lang::tr{'guardian empty input'}";
 245         }
 246
 247         # Go further if there was no error.
 248         if ($errormessage eq '') {
 249                 my $unblock = $settings{'ADDRESS_UNBLOCK'};
 250
 251                 # Call helper to unblock address.
 252                 system("/usr/local/bin/guardianctrl unblock $unblock &>/dev/null");
 253         }
 254
 255 ## Unblock all.
 256 #
 257 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock all'}) {
 258
 259         # Call helper to flush iptables chain from guardian.
 260         system("/usr/local/bin/guardianctrl flush-chain &>/dev/null");
 261 }
 262
 263 # Load settings from file.
 264 &General::readhash("${General::swroot}/guardian/settings", \%settings);
 265
 266 # Call functions to generate whole page.
 267 &showMainBox();
 268 &showIgnoreBox();
 269
 270 # Display area only if guardian is running.
 271 if ( ($memory != 0) && ($pid > 0) ) {
 272         &showBlockedBox();
 273 }
 274
 275 # Function to display the status of guardian and allow base configuration.
 276 sub showMainBox() {
 277         my %checked = ();
 278         my %selected = ();
 279
 280         $checked{'GUARDIAN_ENABLED'}{'on'} = '';
 281         $checked{'GUARDIAN_ENABLED'}{'off'} = '';
 282         $checked{'GUARDIAN_ENABLED'}{$settings{'GUARDIAN_ENABLED'}} = 'checked';
 283         $checked{'GUARDIAN_ENABLE_SNORT'}{'off'} = '';
 284         $checked{'GUARDIAN_ENABLE_SNORT'}{'on'} = '';
 285         $checked{'GUARDIAN_ENABLE_SNORT'}{$settings{'GUARDIAN_ENABLE_SNORT'}} = "checked='checked'";
 286         $checked{'GUARDIAN_ENABLE_SSH'}{'off'} = '';
 287         $checked{'GUARDIAN_ENABLE_SSH'}{'on'} = '';
 288         $checked{'GUARDIAN_ENABLE_SSH'}{$settings{'GUARDIAN_ENABLE_SSH'}} = "checked='checked'";
 289         $checked{'GUARDIAN_ENABLE_HTTPD'}{'off'} = '';
 290         $checked{'GUARDIAN_ENABLE_HTTPD'}{'on'} = '';
 291         $checked{'GUARDIAN_ENABLE_HTTPD'}{$settings{'GUARDIAN_ENABLE_HTTPD'}} = "checked='checked'";
 292         $checked{'GUARDIAN_ENABLE_OWNCLOUD'}{'off'} = '';
 293         $checked{'GUARDIAN_ENABLE_OWNCLOUD'}{'on'} = '';
 294         $checked{'GUARDIAN_ENABLE_OWNCLOUD'}{$settings{'GUARDIAN_ENABLE_OWNCLOUD'}} = "checked='checked'";
 295
 296         $selected{'GUARDIAN_LOGLEVEL'}{$settings{'GUARDIAN_LOGLEVEL'}} = 'selected';
 297         $selected{'GUARDIAN_PRIORITY_LEVEL'}{$settings{'GUARDIAN_PRIORITY_LEVEL'}} = 'selected';
 298
 299         &Header::openpage($Lang::tr{'guardian configuration'}, 1, '');
 300         &Header::openbigbox('100%', 'left', '', $errormessage);
 301
 302         # Print errormessage if there is one.
 303         if ($errormessage) {
 304                 &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 305                 print "<font class='base'>$errormessage&nbsp;</font>\n";
 306                 &Header::closebox();
 307         }
 308
 309
 310         # Draw current guardian state.
 311         &Header::openbox('100%', 'center', $Lang::tr{'guardian'});
 312
 313         # Get current status of guardian.
 314         &daemonstats();
 315         $pid = $pid[0];
 316
 317         # Display some useful information related to guardian, if daemon is running.
 318         if ( ($memory != 0) && ($pid > 0) ){
 319                 print <<END;
 320                         <table width='95%' cellspacing='0' class='tbl'>
 321                                 <tr>
 322                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 323                                 </tr>
 324                                 <tr>
 325                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 326                                         <td align='center' colspan='2' width='75%' bgcolor='${Header::colourgreen}'><font color='white'><strong>$Lang::tr{'running'}</strong></font></td>
 327                                 </tr>
 328                                 <tr>
 329                                         <td class='base'></td>
 330                                         <td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
 331                                         <td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
 332                                 </tr>
 333                                 <tr>
 334                                         <td class='base'></td>
 335                                         <td bgcolor='$color{'color22'}' align='center'>$pid</td>
 336                                         <td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
 337                                 </tr>
 338                         </table>
 339 END
 340         } else {
 341                 # Otherwise display a hint that the service is not launched.
 342                 print <<END;
 343                         <table width='95%' cellspacing='0' class='tbl'>
 344                                 <tr>
 345                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 346                                 </tr>
 347                                 <tr>
 348                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 349                                         <td align='center' width='75%' bgcolor='${Header::colourred}'><font color='white'><strong>$Lang::tr{'stopped'}</strong></font></td>
 350                                 </tr>
 351                         </table>
 352 END
 353         }
 354
 355         &Header::closebox();
 356
 357         # Draw elements for guardian configuration.
 358         &Header::openbox('100%', 'center', $Lang::tr{'guardian configuration'});
 359
 360         print <<END;
 361                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 362
 363                 <table width='95%'>
 364                         <tr>
 365                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian common settings'}</b></td>
 366                         </tr>
 367                         <tr>
 368                                 <td width='20%' class='base'>$Lang::tr{'guardian enabled'}:</td>
 369                                 <td><input type='checkbox' name='GUARDIAN_ENABLED' $checked{'GUARDIAN_ENABLED'}{'on'} /></td>
 370                         </tr>
 371                         <tr>
 372                                 <td colspan='2'><br></td>
 373                         </tr>
 374                         <tr>
 375                                 <td width='20%' class='base'>$Lang::tr{'guardian watch snort alertfile'}</td>
 376                                 <td align='left'>on <input type='radio' name='GUARDIAN_ENABLE_SNORT' value='on' $checked{'GUARDIAN_ENABLE_SNORT'}{'on'} /> /
 377                                 <input type='radio' name='GUARDIAN_ENABLE_SNORT' value='off' $checked{'GUARDIAN_ENABLE_SNORT'}{'off'} /> off</td>
 378                         </tr>
 379                         <tr>
 380                                 <td width='20%' class='base'>$Lang::tr{'guardian block ssh brute-force'}</td>
 381                                 <td align='left'>on <input type='radio' name='GUARDIAN_ENABLE_SSH' value='on' $checked{'GUARDIAN_ENABLE_SSH'}{'on'} /> /
 382                                 <input type='radio' name='GUARDIAN_ENABLE_SSH' value='off' $checked{'GUARDIAN_ENABLE_SSH'}{'off'} /> off</td>
 383                         </tr>
 384                         <tr>
 385                                 <td width='20%' class='base'>$Lang::tr{'guardian block httpd brute-force'}</td>
 386                                 <td align='left'>on <input type='radio' name='GUARDIAN_ENABLE_HTTPD' value='on' $checked{'GUARDIAN_ENABLE_HTTPD'}{'on'} /> /
 387                                 <input type='radio' name='GUARDIAN_ENABLE_HTTPD' value='off' $checked{'GUARDIAN_ENABLE_HTTPD'}{'off'} /> off</td>
 388                         </tr>
 389 END
 390                         # Display owncloud checkbox when the addon is installed.
 391                         if ( -e "$owncloud_meta" ) {
 392                                 print"<tr>\n";
 393                                 print"<td width='20%' class='base'>$Lang::tr{'guardian block owncloud brute-force'}</td>\n";
 394                                 print"<td align='left'>on <input type='radio' name='GUARDIAN_ENABLE_OWNCLOUD' value='on' $checked{'GUARDIAN_ENABLE_OWNCLOUD'}{'on'} /> /\n";
 395                                 print"<input type='radio' name='GUARDIAN_ENABLE_OWNCLOUD' value='off' $checked{'GUARDIAN_ENABLE_OWNCLOUD'}{'off'} /> off</td>\n";
 396                                 print"</tr>\n";
 397                         }
 398         print <<END;
 399                         <tr>
 400                                 <td colspan='2'><br></td>
 401                         </tr>
 402                         <tr>
 403                                 <td align='left' width='20%'>$Lang::tr{'guardian loglevel'}:</td>
 404                                 <td><select name='GUARDIAN_LOGLEVEL'>
 405                                         <option value='off' $selected{'GUARDIAN_LOGLEVEL'}{'off'}>off</option>
 406                                         <option value='info' $selected{'GUARDIAN_LOGLEVEL'}{'info'}>info</option>
 407                                         <option value='debug' $selected{'GUARDIAN_LOGLEVEL'}{'debug'}>debug</option>
 408                                 </select></td>
 409                         </tr>
 410                         <tr>
 411                                 <td colspan='2'><br></td>
 412                         </tr>
 413                         <tr>
 414                                 <td align='left' width='20%'>$Lang::tr{'guardian priority level'}:</td>
 415                                 <td><select name='GUARDIAN_PRIORITY_LEVEL'>
 416                                         <option value='1' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'1'}>1</option>
 417                                         <option value='2' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'2'}>2</option>
 418                                         <option value='3' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'3'}>3</option>
 419                                         <option value='4' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'4'}>4</option>
 420                                 </select></td>
 421                         </tr>
 422                         <tr>
 423                                 <td colspan='2'><br></td>
 424                         </tr>
 425                         <tr>
 426                                 <td width='20%' class='base'>$Lang::tr{'guardian blockcount'}:</td>
 427                                 <td><input type='text' name='GUARDIAN_BLOCKCOUNT' value='$settings{'GUARDIAN_BLOCKCOUNT'}' size='5' /></td>
 428                         </tr>
 429                         <tr>
 430                                 <td width='20%' class='base'>$Lang::tr{'guardian blocktime'}:</td>
 431                                 <td><input type='text' name='GUARDIAN_BLOCKTIME' value='$settings{'GUARDIAN_BLOCKTIME'}' size='10' /></td>
 432                         </tr>
 433                         <tr>
 434                                 <td width='20%' class='base'>$Lang::tr{'guardian logfile'}:</td>
 435                                 <td><input type='text' name='GUARDIAN_LOGFILE' value='$settings{'GUARDIAN_LOGFILE'}' size='30' /></td>
 436                         </tr>
 437                         <tr>
 438                                 <td width='20%' class='base'>$Lang::tr{'guardian snort alertfile'}:</td>
 439                                 <td><input type='text' name='GUARDIAN_SNORT_ALERTFILE' value='$settings{'GUARDIAN_SNORT_ALERTFILE'}' size='30' /></td>
 440                         </tr>
 441                 </table>
 442 END
 443
 444         print <<END;
 445                 <hr>
 446
 447                 <table width='95%'>
 448                         <tr>
 449                                 <td>&nbsp;</td>
 450                                 <td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 451                                 <td>&nbsp;</td>
 452                         </tr>
 453                 </table>
 454         </form>
 455 END
 456
 457         &Header::closebox();
 458 }
 459
 460 # Function to show elements of the guardian ignorefile and allow to add or remove single members of it.
 461 sub showIgnoreBox() {
 462         &Header::openbox('100%', 'center', $Lang::tr{'guardian ignored hosts'});
 463
 464         print <<END;
 465                 <table width='60%'>
 466                         <tr>
 467                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian ignored hosts'}</b></td>
 468                         </tr>
 469 END
 470                         # Check if the guardian ignore file contains any content.
 471                         if (-s $ignorefile) {
 472
 473                                 # Open file and print contents.
 474                                 open FILE, $ignorefile or die "Could not open $ignorefile";
 475
 476                                 my $id = 0;
 477                                 my $col = "";
 478
 479                                 # Read file line by line and print out the elements.
 480                                 while( my $ignored_element = <FILE> )  {
 481
 482                                         # Increase id number for each element in the ignore file.
 483                                         $id++;
 484
 485                                         # Check if the id number is even or not.
 486                                         if ($id % 2) {
 487                                                 $col="bgcolor='$color{'color22'}'";
 488                                         } else {
 489                                                 $col="bgcolor='$color{'color20'}'";
 490                                         }
 491
 492                                         print <<END;
 493                                         <tr>
 494                                                 <td width='80%' class='base' $col>$ignored_element</td>
 495                                                 <td width='20%' align='center' $col>
 496                                                         <form method='post' name='$id' action='$ENV{'SCRIPT_NAME'}'>
 497                                                                 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}'>
 498                                                                 <input type='hidden' name='ID' value='$id'>
 499                                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}'>
 500                                                         </form>
 501                                                 </td>
 502                                         </tr>
 503 END
 504                                 }
 505                         close (FILE);
 506                         } else {
 507                                 # Print notice that currently no elements are stored in the ignore file.
 508                                 print "<tr>\n";
 509                                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 510                                 print "</tr>\n";
 511                         }
 512
 513                 print "</table>\n";
 514
 515         # Section to add new elements to the ignore list.
 516         print <<END;
 517         <br>
 518         <div align='center'>
 519                 <table width='60%'>
 520                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 521                         <tr>
 522                                 <td width='30%'>$Lang::tr{'dnsforward add a new entry'}: </td>
 523                                 <td width='50%'><input type='text' name='NEW_IGNORE_ENTRY' value='' size='24' /></td>
 524                                 <td align='center' width='20%'><input type='submit' name='ACTION' value='$Lang::tr{'add'}' /></td>
 525                         </tr>
 526                         </form>
 527                 </table>
 528         </div>
 529 END
 530
 531         &Header::closebox();
 532 }
 533
 534 # Function to list currently bocked addresses from guardian and unblock them or add custom entries to block.
 535 sub showBlockedBox() {
 536         &Header::openbox('100%', 'center', $Lang::tr{'guardian blocked hosts'});
 537
 538         print <<END;
 539         <table width='60%'>
 540                 <tr>
 541                         <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian blocked hosts'}</b></td>
 542                 </tr>
 543 END
 544
 545                 # Lauch function to get the currently blocked hosts.
 546                 my @blocked_hosts = &GetBlockedHosts();
 547
 548                 my $id = 0;
 549                 my $col = "";
 550
 551                 # Loop through our blocked hosts array.
 552                 foreach my $blocked_host (@blocked_hosts) {
 553
 554                         # Increase id number for each element in the ignore file.
 555                         $id++;
 556
 557                         # Check if the id number is even or not.
 558                         if ($id % 2) {
 559                                 $col="bgcolor='$color{'color22'}'";
 560                         } else {
 561                                 $col="bgcolor='$color{'color20'}'";
 562                         }
 563
 564                         print <<END;
 565                         <tr>
 566                                 <td width='80%' class='base' $col><a href='/cgi-bin/ipinfo.cgi?ip=$blocked_host'>$blocked_host</a></td>
 567                                 <td width='20%' align='center' $col>
 568                                         <form method='post' name='frmb$id' action='$ENV{'SCRIPT_NAME'}'>
 569                                                 <input type='image' name='$Lang::tr{'unblock'}' src='/images/delete.gif' title='$Lang::tr{'unblock'}' alt='$Lang::tr{'unblock'}'>
 570                                                 <input type='hidden' name='ADDRESS_UNBLOCK' value='$blocked_host'>
 571                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'unblock'}'>
 572                                         </form>
 573                                 </td>
 574                         </tr>
 575 END
 576                 }
 577
 578         # If the loop only has been runs once the id still is "0", which means there are no
 579         # additional entries (blocked hosts) in the iptables chain.
 580         if ($id == 0) {
 581
 582                 # Print notice that currently no hosts are blocked.
 583                 print "<tr>\n";
 584                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 585                 print "</tr>\n";
 586         }
 587
 588         print "</table>\n";
 589
 590         # Section for a manual block of an IP-address.
 591         print <<END;
 592         <br>
 593         <div align='center'>
 594                 <table width='60%' border='0'>
 595                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 596                         <tr>
 597                                 <td width='30%'>$Lang::tr{'guardian block a host'}: </td>
 598                                 <td width='40%'><input type='text' name='ADDRESS_BLOCK' value='' size='24' /></td>
 599                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'block'}'></td>
 600                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'unblock all'}'></td>
 601                         </tr>
 602                         </form>
 603                 </table>
 604         </div>
 605 END
 606
 607         &Header::closebox();
 608 }
 609
 610 &Header::closebigbox();
 611 &Header::closepage();
 612
 613 # Function to check if guardian has been started.
 614 # Grab process id and consumed memory if the daemon is running.
 615 sub daemonstats() {
 616         $memory = 0;
 617         # for pid and memory
 618         open(FILE, '/usr/local/bin/addonctrl guardian status | ');
 619         @guardian = <FILE>;
 620         close(FILE);
 621         $string = join("", @guardian);
 622         $string =~ s/[a-z_]//gi;
 623         $string =~ s/\[[0-1]\;[0-9]+//gi;
 624         $string =~ s/[\(\)\.]//gi;
 625         $string =~ s/  //gi;
 626         $string =~ s/\e//gi;
 627         @pid = split(/\s/,$string);
 628         if (open(FILE, "/proc/$pid[0]/statm")){
 629                 my $temp = <FILE>;
 630                 @memory = split(/ /,$temp);
 631                 close(FILE);
 632         }
 633         $memory+=$memory[0];
 634 }
 635
 636 sub GetBlockedHosts() {
 637
 638         # Create new, empty array.
 639         my @hosts;
 640
 641         # Lauch helper to get chains from iptables.
 642         open(FILE, "/usr/local/bin/guardianctrl get-chain |");
 643
 644         # Read file line by line and print out the elements.
 645         foreach my $line (<FILE>) {
 646
 647                 # Skip descriptive lines.
 648                 next if ($line =~ /^Chain/);
 649                 next if ($line =~ /^ pkts/);
 650
 651                 # Generate array, based on the line content (seperator is a single or multiple space's)
 652                 my @comps = split(/\s{1,}/, $line);
 653                 my ($lead, $pkts, $bytes, $target, $prot, $opt, $in, $out, $source, $destination) = @comps;
 654
 655                 # Assign different variable names.
 656                 my $blocked_host = $source;
 657
 658                 # Add host to our hosts array.
 659                 push(@hosts, $blocked_host);
 660         }
 661
 662         # Convert entries, sort them, write back and store the sorted entries into new array.
 663         my @sorted = map  { $_->[0] }
 664              sort { $a->[1] <=> $b->[1] }
 665              map  { [$_, int sprintf("%03.f%03.f%03.f%03.f", split(/\./, $_))] }
 666              @hosts;
 667
 668         # Return our sorted list.
 669         return @sorted
 670 }
 671
 672 sub BuildConfiguration() {
 673         my %settings = ();
 674         &General::readhash("${General::swroot}/guardian/settings", \%settings);
 675
 676         my $configfile = "${General::swroot}/guardian/guardian.conf";
 677
 678         # We set this to 1 (enabled) to prevent guardian from blocking the ISP gateway.
 679         my $HostGatewayByte = "1";
 680
 681         # Open configfile for writing.
 682         open(FILE, ">$configfile");
 683
 684         print FILE "EnableSnortMonitoring\t\t$settings{'GUARDIAN_ENABLE_SNORT'}\n";
 685         print FILE "EnableSSHMonitoring\t\t$settings{'GUARDIAN_ENABLE_SSH'}\n";
 686         print FILE "EnableHTTPDMonitoring\t\t$settings{'GUARDIAN_ENABLE_HTTPD'}\n";
 687
 688         # Check if owncloud settings should be written.
 689         if (exists $settings{'GUARDIAN_ENABLE_OWNCLOUD'}) {
 690                 print FILE "EnableOwncloudMonitoring\t$settings{'GUARDIAN_ENABLE_OWNCLOUD'}\n";
 691         }
 692
 693         print FILE "LogLevel\t\t\t$settings{'GUARDIAN_LOGLEVEL'}\n";
 694         print FILE "BlockCount\t\t\t$settings{'GUARDIAN_BLOCKCOUNT'}\n";
 695         print FILE "HostGatewayByte\t\t\t$HostGatewayByte\n";
 696         print FILE "LogFile\t\t\t\t$settings{'GUARDIAN_LOGFILE'}\n";
 697         print FILE "AlertFile\t\t\t$settings{'GUARDIAN_SNORT_ALERTFILE'}\n";
 698         print FILE "IgnoreFile\t\t\t$ignorefile\n";
 699         print FILE "TimeLimit\t\t\t$settings{'GUARDIAN_BLOCKTIME'}\n";
 700         print FILE "PriorityLevel\t\t\t$settings{'GUARDIAN_PRIORITY_LEVEL'}\n";
 701
 702         close(FILE);
 703
 704         # Check if guardian should be started or stopped.
 705         if($settings{'GUARDIAN_ENABLED'} eq 'on') {
 706                 if($pid > 0) {
 707                         # Call guardianctl to perform a reload.
 708                         system("/usr/local/bin/guardianctrl reload &>/dev/null");
 709                 } else {
 710                         # Launch guardian.
 711                         system("/usr/local/bin/guardianctrl start &>/dev/null");
 712                 }
 713         } else {
 714                 # Stop the daemon.
 715                 system("/usr/local/bin/guardianctrl stop &>/dev/null");
 716         }
 717 }