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 = (
  35         ${Header::colourred},
  36         ${Header::colourgreen}
  37 );
  38
  39 undef (@dummy);
  40
  41 my $string=();
  42 my $memory=();
  43 my @memory=();
  44 my @pid=();
  45 my @guardian=();
  46
  47 # Path to the guardian.ignore file.
  48 my $ignorefile ='/var/ipfire/guardian/guardian.ignore';
  49
  50 our %netsettings = ();
  51 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  52
  53 our %color = ();
  54 our %mainsettings = ();
  55 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  56 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  57
  58 # Pakfire meta file for owncloud.
  59 # (File exists when the addon is installed.)
  60 my $owncloud_meta = "/opt/pakfire/db/installed/meta-owncloud";
  61
  62 our %settings = ();
  63
  64 $settings{'ACTION'} = '';
  65
  66 $settings{'GUARDIAN_ENABLED'} = 'off';
  67 $settings{'GUARDIAN_ENABLE_SNORT'} = 'on';
  68 $settings{'GUARDIAN_ENABLE_SSH'} = 'on';
  69 $settings{'GUARDIAN_ENABLE_HTTPD'} = 'on';
  70 $settings{'GUARDIAN_ENABLE_OWNCLOUD'} = '';
  71 $settings{'GUARDIAN_LOGLEVEL'} = 'info';
  72 $settings{'GUARDIAN_BLOCKCOUNT'} = '3';
  73 $settings{'GUARDIAN_BLOCKTIME'} = '86400';
  74 $settings{'GUARDIAN_LOGFILE'} = '/var/log/guardian/guardian.log';
  75 $settings{'GUARDIAN_SNORT_ALERTFILE'} = '/var/log/snort/alert';
  76 $settings{'GUARDIAN_PRIORITY_LEVEL'} = '3';
  77
  78 # Default settings for owncloud if installed.
  79 if ( -e "$owncloud_meta") {
  80         $settings{'GUARDIAN_ENABLE_OWNCLOUD'} = 'off';
  81 }
  82
  83 my $errormessage = '';
  84
  85 &Header::showhttpheaders();
  86
  87 # Get GUI values.
  88 &Header::getcgihash(\%settings);
  89
  90 # Check if guardian is running and grab some stats.
  91 &daemonstats();
  92 my $pid = $pid[0];
  93
  94 ## Perform input checks and save settings.
  95 #
  96 if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
  97         # Check for valid blocktime.
  98         unless(($settings{'GUARDIAN_BLOCKTIME'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKTIME'} ne "0")) {
  99                         $errormessage = "$Lang::tr{'guardian invalid blocktime'}";
 100         }
 101
 102         # Check if the bloccount is valid.
 103         unless(($settings{'GUARDIAN_BLOCKCOUNT'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKCOUNT'} ne "0")) {
 104                         $errormessage = "$Lang::tr{'guardian invalid blockcount'}";
 105         }
 106
 107         # Check Logfile.
 108         unless($settings{'GUARDIAN_LOGFILE'} =~ /^[a-zA-Z0-9\.\/]+$/) {
 109                 $errormessage = "$Lang::tr{'guardian invalid logfile'}";
 110         }
 111
 112         # Check input for snort alert file.
 113         unless($settings{'GUARDIAN_SNORT_ALERTFILE'} =~ /^[a-zA-Z0-9\.\/]+$/) {
 114                 $errormessage = "$Lang::tr{'guardian invalid alertfile'}";
 115         }
 116
 117         # Only continue if no error message has been set.
 118         if($errormessage eq '') {
 119                 # Write configuration settings to file.
 120                 &General::writehash("${General::swroot}/guardian/settings", \%settings);
 121
 122                 # Update configuration files.
 123                 &BuildConfiguration();
 124         }
 125
 126 ## Add a new entry to the ignore file.
 127 #
 128 } elsif ($settings{'ACTION'} eq $Lang::tr{'add'}) {
 129
 130         # Check if any input has been performed.
 131         if ($settings{'NEW_IGNORE_ENTRY'} ne '') {
 132
 133                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 134                 if ((!&General::validip($settings{'NEW_IGNORE_ENTRY'})) && (!&General::validipandmask($settings{'NEW_IGNORE_ENTRY'}))) {
 135                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 136                 }
 137         } else {
 138                 $errormessage = "$Lang::tr{'guardian empty input'}";
 139         }
 140
 141         # Go further if there was no error.
 142         if ($errormessage eq '') {
 143                 my $new_entry = $settings{'NEW_IGNORE_ENTRY'};
 144
 145                 # Open file for appending the new entry.
 146                 open (FILE, ">>$ignorefile") or die "Unable to open $ignorefile for writing";
 147
 148                 # Write the new entry to the ignore file.
 149                 print FILE "$new_entry\n";
 150                 close(FILE);
 151         }
 152
 153         # Check if guardian is running.
 154         if ($pid > 0) {
 155                 # Call guardianctrl to perform a reload.
 156                 system("/usr/local/bin/guardianctrl reload &>/dev/null");
 157         }
 158
 159 ## Remove entry from ignore list.
 160 #
 161 } elsif ($settings{'ACTION'} eq $Lang::tr{'remove'}) {
 162         my $id = 0;
 163
 164         # Open ignorefile and read content.
 165         open(FILE, "<$ignorefile") or die "Unable to open $ignorefile.";
 166         my @current = <FILE>;
 167         close(FILE);
 168
 169         # Re-open ignorefile for writing.
 170         open(FILE, ">$ignorefile") or die "Unable to open $ignorefile for writing";
 171         flock FILE, 2;
 172
 173         # Read line by line from ignorefile and write them back except the line with the given ID.
 174         # So this line is missing in the new file and the entry has been deleted.
 175         foreach my $line (@current) {
 176                 $id++;
 177                 unless ($settings{'ID'} eq $id) {
 178                         print FILE "$line";
 179                 }
 180         }
 181         close(FILE);
 182
 183         # Check if guardian is running.
 184         if ($pid > 0) {
 185                 # Call guardianctrl to perform a reload.
 186                 system("/usr/local/bin/guardianctrl reload &>/dev/null");
 187         }
 188
 189 ## Block a user given address or subnet.
 190 #
 191 } elsif ($settings{'ACTION'} eq $Lang::tr{'block'}) {
 192
 193         # Assign some temporary variables used for input validation.
 194         my $input = $settings{'ADDRESS_BLOCK'};
 195         my $green = $netsettings{'GREEN_ADDRESS'};
 196         my $blue = $netsettings{'BLUE_ADDRESS'};
 197         my $orange = $netsettings{'ORANGE_ADDRESS'};
 198         my $red = $netsettings{'RED_ADDRESS'};
 199
 200         # Get gateway address.
 201         my $gateway = &General::get_gateway();
 202
 203         # Check if any input has been performed.
 204         if ($input eq '') {
 205                 $errormessage = "$Lang::tr{'guardian empty input'}";
 206         }
 207
 208         # Check if the given input is localhost (127.0.0.1).
 209         elsif ($input eq "127.0.0.1") {
 210                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 211         }
 212
 213         # Check if the given input is anywhere (0.0.0.0).
 214         elsif ($input eq "0.0.0.0") {
 215                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 216         }
 217
 218         # Check if the given input is one of the interface addresses or our gateway.
 219         elsif ($input eq "$green" || $input eq "$blue" || $input eq "$orange" || $input eq "$red" || $input eq "$gateway") {
 220                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 221         }
 222
 223         # Check if the given input is a valid IP address.
 224         elsif (!&General::validip($input)) {
 225                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 226         }
 227
 228         # Go further if there was no error.
 229         if ($errormessage eq '') {
 230                 my $block = $settings{'ADDRESS_BLOCK'};
 231
 232                 # Call helper to unblock address.
 233                 system("/usr/local/bin/guardianctrl block $block &>/dev/null");
 234         }
 235
 236 ## Unblock address or subnet.
 237 #
 238 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock'}) {
 239
 240         # Check if no empty input has been performed.
 241         if ($settings{'ADDRESS_UNBLOCK'} ne '') {
 242
 243                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 244                 if ((!&General::validip($settings{'ADDRESS_UNBLOCK'})) && (!&General::validipandmask($settings{'ADDRESS_UNBLOCK'}))) {
 245                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 246                 }
 247
 248         } else {
 249                 $errormessage = "$Lang::tr{'guardian empty input'}";
 250         }
 251
 252         # Go further if there was no error.
 253         if ($errormessage eq '') {
 254                 my $unblock = $settings{'ADDRESS_UNBLOCK'};
 255
 256                 # Call helper to unblock address.
 257                 system("/usr/local/bin/guardianctrl unblock $unblock &>/dev/null");
 258         }
 259
 260 ## Unblock all.
 261 #
 262 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock all'}) {
 263
 264         # Call helper to flush iptables chain from guardian.
 265         system("/usr/local/bin/guardianctrl flush-chain &>/dev/null");
 266 }
 267
 268 # Load settings from file.
 269 &General::readhash("${General::swroot}/guardian/settings", \%settings);
 270
 271 # Call functions to generate whole page.
 272 &showMainBox();
 273 &showIgnoreBox();
 274
 275 # Display area only if guardian is running.
 276 if ( ($memory != 0) && ($pid > 0) ) {
 277         &showBlockedBox();
 278 }
 279
 280 # Function to display the status of guardian and allow base configuration.
 281 sub showMainBox() {
 282         my %checked = ();
 283         my %selected = ();
 284
 285         $checked{'GUARDIAN_ENABLED'}{'on'} = '';
 286         $checked{'GUARDIAN_ENABLED'}{'off'} = '';
 287         $checked{'GUARDIAN_ENABLED'}{$settings{'GUARDIAN_ENABLED'}} = 'checked';
 288         $checked{'GUARDIAN_ENABLE_SNORT'}{'off'} = '';
 289         $checked{'GUARDIAN_ENABLE_SNORT'}{'on'} = '';
 290         $checked{'GUARDIAN_ENABLE_SNORT'}{$settings{'GUARDIAN_ENABLE_SNORT'}} = "checked='checked'";
 291         $checked{'GUARDIAN_ENABLE_SSH'}{'off'} = '';
 292         $checked{'GUARDIAN_ENABLE_SSH'}{'on'} = '';
 293         $checked{'GUARDIAN_ENABLE_SSH'}{$settings{'GUARDIAN_ENABLE_SSH'}} = "checked='checked'";
 294         $checked{'GUARDIAN_ENABLE_HTTPD'}{'off'} = '';
 295         $checked{'GUARDIAN_ENABLE_HTTPD'}{'on'} = '';
 296         $checked{'GUARDIAN_ENABLE_HTTPD'}{$settings{'GUARDIAN_ENABLE_HTTPD'}} = "checked='checked'";
 297         $checked{'GUARDIAN_ENABLE_OWNCLOUD'}{'off'} = '';
 298         $checked{'GUARDIAN_ENABLE_OWNCLOUD'}{'on'} = '';
 299         $checked{'GUARDIAN_ENABLE_OWNCLOUD'}{$settings{'GUARDIAN_ENABLE_OWNCLOUD'}} = "checked='checked'";
 300
 301         $selected{'GUARDIAN_LOGLEVEL'}{$settings{'GUARDIAN_LOGLEVEL'}} = 'selected';
 302         $selected{'GUARDIAN_PRIORITY_LEVEL'}{$settings{'GUARDIAN_PRIORITY_LEVEL'}} = 'selected';
 303
 304         &Header::openpage($Lang::tr{'guardian configuration'}, 1, '');
 305         &Header::openbigbox('100%', 'left', '', $errormessage);
 306
 307         # Print errormessage if there is one.
 308         if ($errormessage) {
 309                 &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 310                 print "<font class='base'>$errormessage&nbsp;</font>\n";
 311                 &Header::closebox();
 312         }
 313
 314
 315         # Draw current guardian state.
 316         &Header::openbox('100%', 'center', $Lang::tr{'guardian'});
 317
 318         # Get current status of guardian.
 319         &daemonstats();
 320         $pid = $pid[0];
 321
 322         # Display some useful information related to guardian, if daemon is running.
 323         if ( ($memory != 0) && ($pid > 0) ){
 324                 print <<END;
 325                         <table width='95%' cellspacing='0' class='tbl'>
 326                                 <tr>
 327                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 328                                 </tr>
 329                                 <tr>
 330                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 331                                         <td align='center' colspan='2' width='75%' bgcolor='${Header::colourgreen}'><font color='white'><strong>$Lang::tr{'running'}</strong></font></td>
 332                                 </tr>
 333                                 <tr>
 334                                         <td class='base'></td>
 335                                         <td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
 336                                         <td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
 337                                 </tr>
 338                                 <tr>
 339                                         <td class='base'></td>
 340                                         <td bgcolor='$color{'color22'}' align='center'>$pid</td>
 341                                         <td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
 342                                 </tr>
 343                         </table>
 344 END
 345         } else {
 346                 # Otherwise display a hint that the service is not launched.
 347                 print <<END;
 348                         <table width='95%' cellspacing='0' class='tbl'>
 349                                 <tr>
 350                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 351                                 </tr>
 352                                 <tr>
 353                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 354                                         <td align='center' width='75%' bgcolor='${Header::colourred}'><font color='white'><strong>$Lang::tr{'stopped'}</strong></font></td>
 355                                 </tr>
 356                         </table>
 357 END
 358         }
 359
 360         &Header::closebox();
 361
 362         # Draw elements for guardian configuration.
 363         &Header::openbox('100%', 'center', $Lang::tr{'guardian configuration'});
 364
 365         print <<END;
 366                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 367
 368                 <table width='95%'>
 369                         <tr>
 370                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian common settings'}</b></td>
 371                         </tr>
 372                         <tr>
 373                                 <td width='20%' class='base'>$Lang::tr{'guardian enabled'}:</td>
 374                                 <td><input type='checkbox' name='GUARDIAN_ENABLED' $checked{'GUARDIAN_ENABLED'}{'on'} /></td>
 375                         </tr>
 376                         <tr>
 377                                 <td colspan='2'><br></td>
 378                         </tr>
 379                         <tr>
 380                                 <td width='20%' class='base'>$Lang::tr{'guardian watch snort alertfile'}</td>
 381                                 <td align='left'>on <input type='radio' name='GUARDIAN_ENABLE_SNORT' value='on' $checked{'GUARDIAN_ENABLE_SNORT'}{'on'} /> /
 382                                 <input type='radio' name='GUARDIAN_ENABLE_SNORT' value='off' $checked{'GUARDIAN_ENABLE_SNORT'}{'off'} /> off</td>
 383                         </tr>
 384                         <tr>
 385                                 <td width='20%' class='base'>$Lang::tr{'guardian block ssh brute-force'}</td>
 386                                 <td align='left'>on <input type='radio' name='GUARDIAN_ENABLE_SSH' value='on' $checked{'GUARDIAN_ENABLE_SSH'}{'on'} /> /
 387                                 <input type='radio' name='GUARDIAN_ENABLE_SSH' value='off' $checked{'GUARDIAN_ENABLE_SSH'}{'off'} /> off</td>
 388                         </tr>
 389                         <tr>
 390                                 <td width='20%' class='base'>$Lang::tr{'guardian block httpd brute-force'}</td>
 391                                 <td align='left'>on <input type='radio' name='GUARDIAN_ENABLE_HTTPD' value='on' $checked{'GUARDIAN_ENABLE_HTTPD'}{'on'} /> /
 392                                 <input type='radio' name='GUARDIAN_ENABLE_HTTPD' value='off' $checked{'GUARDIAN_ENABLE_HTTPD'}{'off'} /> off</td>
 393                         </tr>
 394 END
 395                         # Display owncloud checkbox when the addon is installed.
 396                         if ( -e "$owncloud_meta" ) {
 397                                 print"<tr>\n";
 398                                 print"<td width='20%' class='base'>$Lang::tr{'guardian block owncloud brute-force'}</td>\n";
 399                                 print"<td align='left'>on <input type='radio' name='GUARDIAN_ENABLE_OWNCLOUD' value='on' $checked{'GUARDIAN_ENABLE_OWNCLOUD'}{'on'} /> /\n";
 400                                 print"<input type='radio' name='GUARDIAN_ENABLE_OWNCLOUD' value='off' $checked{'GUARDIAN_ENABLE_OWNCLOUD'}{'off'} /> off</td>\n";
 401                                 print"</tr>\n";
 402                         }
 403         print <<END;
 404                         <tr>
 405                                 <td colspan='2'><br></td>
 406                         </tr>
 407                         <tr>
 408                                 <td align='left' width='20%'>$Lang::tr{'guardian loglevel'}:</td>
 409                                 <td><select name='GUARDIAN_LOGLEVEL'>
 410                                         <option value='off' $selected{'GUARDIAN_LOGLEVEL'}{'off'}>off</option>
 411                                         <option value='info' $selected{'GUARDIAN_LOGLEVEL'}{'info'}>info</option>
 412                                         <option value='debug' $selected{'GUARDIAN_LOGLEVEL'}{'debug'}>debug</option>
 413                                 </select></td>
 414                         </tr>
 415                         <tr>
 416                                 <td colspan='2'><br></td>
 417                         </tr>
 418                         <tr>
 419                                 <td align='left' width='20%'>$Lang::tr{'guardian priority level'}:</td>
 420                                 <td><select name='GUARDIAN_PRIORITY_LEVEL'>
 421                                         <option value='1' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'1'}>1</option>
 422                                         <option value='2' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'2'}>2</option>
 423                                         <option value='3' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'3'}>3</option>
 424                                         <option value='4' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'4'}>4</option>
 425                                 </select></td>
 426                         </tr>
 427                         <tr>
 428                                 <td colspan='2'><br></td>
 429                         </tr>
 430                         <tr>
 431                                 <td width='20%' class='base'>$Lang::tr{'guardian blockcount'}:</td>
 432                                 <td><input type='text' name='GUARDIAN_BLOCKCOUNT' value='$settings{'GUARDIAN_BLOCKCOUNT'}' size='5' /></td>
 433                         </tr>
 434                         <tr>
 435                                 <td width='20%' class='base'>$Lang::tr{'guardian blocktime'}:</td>
 436                                 <td><input type='text' name='GUARDIAN_BLOCKTIME' value='$settings{'GUARDIAN_BLOCKTIME'}' size='10' /></td>
 437                         </tr>
 438                         <tr>
 439                                 <td width='20%' class='base'>$Lang::tr{'guardian logfile'}:</td>
 440                                 <td><input type='text' name='GUARDIAN_LOGFILE' value='$settings{'GUARDIAN_LOGFILE'}' size='30' /></td>
 441                         </tr>
 442                         <tr>
 443                                 <td width='20%' class='base'>$Lang::tr{'guardian snort alertfile'}:</td>
 444                                 <td><input type='text' name='GUARDIAN_SNORT_ALERTFILE' value='$settings{'GUARDIAN_SNORT_ALERTFILE'}' size='30' /></td>
 445                         </tr>
 446                 </table>
 447 END
 448
 449         print <<END;
 450                 <hr>
 451
 452                 <table width='95%'>
 453                         <tr>
 454                                 <td>&nbsp;</td>
 455                                 <td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 456                                 <td>&nbsp;</td>
 457                         </tr>
 458                 </table>
 459         </form>
 460 END
 461
 462         &Header::closebox();
 463 }
 464
 465 # Function to show elements of the guardian ignorefile and allow to add or remove single members of it.
 466 sub showIgnoreBox() {
 467         &Header::openbox('100%', 'center', $Lang::tr{'guardian ignored hosts'});
 468
 469         print <<END;
 470                 <table width='60%'>
 471                         <tr>
 472                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian ignored hosts'}</b></td>
 473                         </tr>
 474 END
 475                         # Check if the guardian ignore file contains any content.
 476                         if (-s $ignorefile) {
 477
 478                                 # Open file and print contents.
 479                                 open FILE, $ignorefile or die "Could not open $ignorefile";
 480
 481                                 my $id = 0;
 482                                 my $col = "";
 483
 484                                 # Read file line by line and print out the elements.
 485                                 while( my $ignored_element = <FILE> )  {
 486
 487                                         # Increase id number for each element in the ignore file.
 488                                         $id++;
 489
 490                                         # Check if the id number is even or not.
 491                                         if ($id % 2) {
 492                                                 $col="bgcolor='$color{'color22'}'";
 493                                         } else {
 494                                                 $col="bgcolor='$color{'color20'}'";
 495                                         }
 496
 497                                         print <<END;
 498                                         <tr>
 499                                                 <td width='80%' class='base' $col>$ignored_element</td>
 500                                                 <td width='20%' align='center' $col>
 501                                                         <form method='post' name='$id' action='$ENV{'SCRIPT_NAME'}'>
 502                                                                 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}'>
 503                                                                 <input type='hidden' name='ID' value='$id'>
 504                                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}'>
 505                                                         </form>
 506                                                 </td>
 507                                         </tr>
 508 END
 509                                 }
 510                         close (FILE);
 511                         } else {
 512                                 # Print notice that currently no elements are stored in the ignore file.
 513                                 print "<tr>\n";
 514                                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 515                                 print "</tr>\n";
 516                         }
 517
 518                 print "</table>\n";
 519
 520         # Section to add new elements to the ignore list.
 521         print <<END;
 522         <br>
 523         <div align='center'>
 524                 <table width='60%'>
 525                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 526                         <tr>
 527                                 <td width='30%'>$Lang::tr{'dnsforward add a new entry'}: </td>
 528                                 <td width='50%'><input type='text' name='NEW_IGNORE_ENTRY' value='' size='24' /></td>
 529                                 <td align='center' width='20%'><input type='submit' name='ACTION' value='$Lang::tr{'add'}' /></td>
 530                         </tr>
 531                         </form>
 532                 </table>
 533         </div>
 534 END
 535
 536         &Header::closebox();
 537 }
 538
 539 # Function to list currently bocked addresses from guardian and unblock them or add custom entries to block.
 540 sub showBlockedBox() {
 541         &Header::openbox('100%', 'center', $Lang::tr{'guardian blocked hosts'});
 542
 543         print <<END;
 544         <table width='60%'>
 545                 <tr>
 546                         <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian blocked hosts'}</b></td>
 547                 </tr>
 548 END
 549
 550                 # Lauch function to get the currently blocked hosts.
 551                 my @blocked_hosts = &GetBlockedHosts();
 552
 553                 my $id = 0;
 554                 my $col = "";
 555
 556                 # Loop through our blocked hosts array.
 557                 foreach my $blocked_host (@blocked_hosts) {
 558
 559                         # Increase id number for each element in the ignore file.
 560                         $id++;
 561
 562                         # Check if the id number is even or not.
 563                         if ($id % 2) {
 564                                 $col="bgcolor='$color{'color22'}'";
 565                         } else {
 566                                 $col="bgcolor='$color{'color20'}'";
 567                         }
 568
 569                         print <<END;
 570                         <tr>
 571                                 <td width='80%' class='base' $col><a href='/cgi-bin/ipinfo.cgi?ip=$blocked_host'>$blocked_host</a></td>
 572                                 <td width='20%' align='center' $col>
 573                                         <form method='post' name='frmb$id' action='$ENV{'SCRIPT_NAME'}'>
 574                                                 <input type='image' name='$Lang::tr{'unblock'}' src='/images/delete.gif' title='$Lang::tr{'unblock'}' alt='$Lang::tr{'unblock'}'>
 575                                                 <input type='hidden' name='ADDRESS_UNBLOCK' value='$blocked_host'>
 576                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'unblock'}'>
 577                                         </form>
 578                                 </td>
 579                         </tr>
 580 END
 581                 }
 582
 583         # If the loop only has been runs once the id still is "0", which means there are no
 584         # additional entries (blocked hosts) in the iptables chain.
 585         if ($id == 0) {
 586
 587                 # Print notice that currently no hosts are blocked.
 588                 print "<tr>\n";
 589                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 590                 print "</tr>\n";
 591         }
 592
 593         print "</table>\n";
 594
 595         # Section for a manual block of an IP-address.
 596         print <<END;
 597         <br>
 598         <div align='center'>
 599                 <table width='60%' border='0'>
 600                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 601                         <tr>
 602                                 <td width='30%'>$Lang::tr{'guardian block a host'}: </td>
 603                                 <td width='40%'><input type='text' name='ADDRESS_BLOCK' value='' size='24' /></td>
 604                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'block'}'></td>
 605                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'unblock all'}'></td>
 606                         </tr>
 607                         </form>
 608                 </table>
 609         </div>
 610 END
 611
 612         &Header::closebox();
 613 }
 614
 615 &Header::closebigbox();
 616 &Header::closepage();
 617
 618 # Function to check if guardian has been started.
 619 # Grab process id and consumed memory if the daemon is running.
 620 sub daemonstats() {
 621         $memory = 0;
 622         # for pid and memory
 623         open(FILE, '/usr/local/bin/addonctrl guardian status | ');
 624         @guardian = <FILE>;
 625         close(FILE);
 626         $string = join("", @guardian);
 627         $string =~ s/[a-z_]//gi;
 628         $string =~ s/\[[0-1]\;[0-9]+//gi;
 629         $string =~ s/[\(\)\.]//gi;
 630         $string =~ s/  //gi;
 631         $string =~ s/\e//gi;
 632         @pid = split(/\s/,$string);
 633         if (open(FILE, "/proc/$pid[0]/statm")){
 634                 my $temp = <FILE>;
 635                 @memory = split(/ /,$temp);
 636                 close(FILE);
 637         }
 638         $memory+=$memory[0];
 639 }
 640
 641 sub GetBlockedHosts() {
 642
 643         # Create new, empty array.
 644         my @hosts;
 645
 646         # Lauch helper to get chains from iptables.
 647         open(FILE, "/usr/local/bin/guardianctrl get-chain |");
 648
 649         # Read file line by line and print out the elements.
 650         foreach my $line (<FILE>) {
 651
 652                 # Skip descriptive lines.
 653                 next if ($line =~ /^Chain/);
 654                 next if ($line =~ /^ pkts/);
 655
 656                 # Generate array, based on the line content (seperator is a single or multiple space's)
 657                 my @comps = split(/\s{1,}/, $line);
 658                 my ($lead, $pkts, $bytes, $target, $prot, $opt, $in, $out, $source, $destination) = @comps;
 659
 660                 # Assign different variable names.
 661                 my $blocked_host = $source;
 662
 663                 # Add host to our hosts array.
 664                 push(@hosts, $blocked_host);
 665         }
 666
 667         # Convert entries, sort them, write back and store the sorted entries into new array.
 668         my @sorted = map  { $_->[0] }
 669              sort { $a->[1] <=> $b->[1] }
 670              map  { [$_, int sprintf("%03.f%03.f%03.f%03.f", split(/\./, $_))] }
 671              @hosts;
 672
 673         # Return our sorted list.
 674         return @sorted
 675 }
 676
 677 sub BuildConfiguration() {
 678         my %settings = ();
 679         &General::readhash("${General::swroot}/guardian/settings", \%settings);
 680
 681         my $configfile = "${General::swroot}/guardian/guardian.conf";
 682
 683         # We set this to 1 (enabled) to prevent guardian from blocking the ISP gateway.
 684         my $HostGatewayByte = "1";
 685
 686         # Open configfile for writing.
 687         open(FILE, ">$configfile");
 688
 689         print FILE "EnableSnortMonitoring\t\t$settings{'GUARDIAN_ENABLE_SNORT'}\n";
 690         print FILE "EnableSSHMonitoring\t\t$settings{'GUARDIAN_ENABLE_SSH'}\n";
 691         print FILE "EnableHTTPDMonitoring\t\t$settings{'GUARDIAN_ENABLE_HTTPD'}\n";
 692
 693         # Check if owncloud settings should be written.
 694         if (exists $settings{'GUARDIAN_ENABLE_OWNCLOUD'}) {
 695                 print FILE "EnableOwncloudMonitoring\t$settings{'GUARDIAN_ENABLE_OWNCLOUD'}\n";
 696         }
 697
 698         print FILE "LogLevel\t\t\t$settings{'GUARDIAN_LOGLEVEL'}\n";
 699         print FILE "BlockCount\t\t\t$settings{'GUARDIAN_BLOCKCOUNT'}\n";
 700         print FILE "HostGatewayByte\t\t\t$HostGatewayByte\n";
 701         print FILE "LogFile\t\t\t\t$settings{'GUARDIAN_LOGFILE'}\n";
 702         print FILE "AlertFile\t\t\t$settings{'GUARDIAN_SNORT_ALERTFILE'}\n";
 703         print FILE "IgnoreFile\t\t\t$ignorefile\n";
 704         print FILE "TimeLimit\t\t\t$settings{'GUARDIAN_BLOCKTIME'}\n";
 705         print FILE "PriorityLevel\t\t\t$settings{'GUARDIAN_PRIORITY_LEVEL'}\n";
 706
 707         close(FILE);
 708
 709         # Check if guardian should be started or stopped.
 710         if($settings{'GUARDIAN_ENABLED'} eq 'on') {
 711                 if($pid > 0) {
 712                         # Call guardianctl to perform a reload.
 713                         system("/usr/local/bin/guardianctrl reload &>/dev/null");
 714                 } else {
 715                         # Launch guardian.
 716                         system("/usr/local/bin/guardianctrl start &>/dev/null");
 717                 }
 718         } else {
 719                 # Stop the daemon.
 720                 system("/usr/local/bin/guardianctrl stop &>/dev/null");
 721         }
 722 }