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