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 my %cgiparams=();
  43
  44 # Path to the guardian.ignore file.
  45 my $ignorefile ='/var/ipfire/guardian/guardian.ignore';
  46
  47 # Path to the guardian.target file.
  48 my $targetfile ='/var/ipfire/guardian/guardian.ignore';
  49
  50 our %netsettings = ();
  51 &General::readhash("${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 our %settings = ();
  59
  60 $settings{'GUARDIAN_ENABLED'} = 'off';
  61 $settings{'GUARDIAN_BLOCKINTERFACES'} ='default';
  62 $settings{'GUARDIAN_BLOCKTIME'} = '86400';
  63 $settings{'GUARDIAN_LOGFILE'} = '/var/log/guardian/guardian.log';
  64 $settings{'GUARDIAN_SNORT_ALERTFILE'} = '/var/log/snort/alert';
  65
  66 $settings{'ACTION'} = '';
  67
  68 my $errormessage = '';
  69
  70 &Header::showhttpheaders();
  71
  72 # Get GUI values.
  73 &Header::getcgihash(\%settings);
  74 &Header::getcgihash(\%cgiparams);
  75
  76 ## Perform input checks and save settings.
  77 #
  78 if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
  79
  80         # Check for valid blocktime.
  81         if ($settings{'GUARDIAN_BLOCKTIME'} ne '') {
  82                 if (($settings{'GUARDIAN_BLOCKTIME'} !~ /^[0-9]+$/) || ($settings{'GUARDIAN_BLOCKTIME'} le '0')) {
  83                         $errormessage = "$Lang::tr{'guardian invalid blocktime'}";
  84                 }
  85         }
  86
  87         # Check Logfile.
  88         if ($settings{'GUARDIAN_LOGFILE'} ne '') {
  89                 if ($settings{'GUARDIAN_LOGFILE'} !~ /^[a-zA-Z0-9\.\/]+$/) {
  90                         $errormessage = "$Lang::tr{'guardian invalid logfile'}";
  91                 }
  92         }
  93
  94         # Check input for snort alert file.
  95         if ($settings{'GUARDIAN_SNORT_ALERTFILE'} ne '') {
  96                 if ($settings{'GUARDIAN_SNORT_ALERTFILE'} !~ /^[a-zA-Z0-9\.\/]+$/) {
  97                         $errormessage = "$Lang::tr{'guardian invalid alertfile'}";
  98                 }
  99         }
 100
 101         # Only continue if no error message has been set.
 102         if ($errormessage eq '') {
 103                 # Write configuration settings to file.
 104                 &General::writehash("${General::swroot}/guardian/settings", \%settings);
 105
 106                 # Update configuration files.
 107                 &BuildConfiguration();
 108         }
 109
 110 ## Add a new entry to the ignore file.
 111 #
 112 } elsif ($settings{'ACTION'} eq $Lang::tr{'add'}) {
 113
 114         # Check if any input has been performed.
 115         if ($settings{'NEW_IGNORE_ENTRY'} ne '') {
 116
 117                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 118                 if ((!&General::validip($settings{'NEW_IGNORE_ENTRY'})) && (!&General::validipandmask($settings{'NEW_IGNORE_ENTRY'}))) {
 119                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 120                 }
 121         } else {
 122                 $errormessage = "$Lang::tr{'guardian empty input'}";
 123         }
 124
 125         # Go further if there was no error.
 126         if ($errormessage eq '') {
 127                 my $new_entry = $settings{'NEW_IGNORE_ENTRY'};
 128
 129                 # Open file for appending the new entry.
 130                 open (FILE, ">>$ignorefile") or die "Unable to open $ignorefile for writing";
 131
 132                 # Write the new entry to the ignore file.
 133                 print FILE "$new_entry\n";
 134                 close(FILE);
 135         }
 136
 137 ## Remove entry from ignore list.
 138 #
 139 } elsif ($settings{'ACTION'} eq $Lang::tr{'remove'}) {
 140         my $id = 0;
 141
 142         # Open ignorefile and read content.
 143         open(FILE, "<$ignorefile") or die "Unable to open $ignorefile.";
 144         my @current = <FILE>;
 145         close(FILE);
 146
 147         # Re-open ignorefile for writing.
 148         open(FILE, ">$ignorefile") or die "Unable to open $ignorefile for writing";
 149         flock FILE, 2;
 150
 151         # Read line by line from ignorefile and write them back except the line with the given ID.
 152         # So this line is missing in the new file and the entry has been deleted.
 153         foreach my $line (@current) {
 154                 $id++;
 155                 unless ($cgiparams{'ID'} eq $id) {
 156                         print FILE "$line";
 157                 }
 158         }
 159         close(FILE);
 160
 161 ## Block a user given address or subnet.
 162 #
 163 } elsif ($settings{'ACTION'} eq $Lang::tr{'block'}) {
 164
 165         # Check if no empty input has been performed.
 166         if ($settings{'ADDRESS_BLOCK'} ne '') {
 167
 168                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 169                 if ((!&General::validip($settings{'ADDRESS_BLOCK'})) && (!&General::validipandmask($settings{'ADDRESS_BLOCK'}))) {
 170                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 171                 }
 172
 173         } else {
 174                 $errormessage = "$Lang::tr{'guardian empty input'}";
 175         }
 176
 177         # Go further if there was no error.
 178         if ($errormessage eq '') {
 179                 my $block = $settings{'ADDRESS_BLOCK'};
 180
 181                 # Call helper to unblock address.
 182                 system("/usr/local/bin/guardianctrl block $block &>/dev/null");
 183         }
 184
 185 ## Unblock address or subnet.
 186 #
 187 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock'}) {
 188
 189         # Check if no empty input has been performed.
 190         if ($settings{'ADDRESS_UNBLOCK'} ne '') {
 191
 192                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 193                 if ((!&General::validip($settings{'ADDRESS_UNBLOCK'})) && (!&General::validipandmask($settings{'ADDRESS_UNBLOCK'}))) {
 194                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 195                 }
 196
 197         } else {
 198                 $errormessage = "$Lang::tr{'guardian empty input'}";
 199         }
 200
 201         # Go further if there was no error.
 202         if ($errormessage eq '') {
 203                 my $unblock = $settings{'ADDRESS_UNBLOCK'};
 204
 205                 # Call helper to unblock address.
 206                 system("/usr/local/bin/guardianctrl unblock $unblock &>/dev/null");
 207         }
 208
 209 ## Unblock all.
 210 #
 211 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock all'}) {
 212
 213         # Call helper to flush iptables chain from guardian.
 214         system("/usr/local/bin/guardianctrl flush-chain &>/dev/null");
 215
 216 } else {
 217         # Load settings from file.
 218         &General::readhash("${General::swroot}/guardian/settings", \%settings);
 219 }
 220
 221
 222 # Call functions to generate whole page.
 223 &showMainBox();
 224 &showIgnoreBox();
 225
 226 # Display area only if guardian is running.
 227 if ( ($memory != 0) && (@pid[0] ne "///") ) {
 228         &showBlockedBox();
 229 }
 230
 231 # Function to display the status of guardian and allow base configuration.
 232 sub showMainBox() {
 233         my %checked = ();
 234
 235         $checked{'GUARDIAN_ENABLED'}{'on'} = '';
 236         $checked{'GUARDIAN_ENABLED'}{'off'} = '';
 237         $checked{'GUARDIAN_ENABLED'}{$settings{'GUARDIAN_ENABLED'}} = 'checked';
 238
 239         $checked{'GUARDIAN_BLOCKINTERFACES'}{'default'} = '';
 240         $checked{'GUARDIAN_BLOCKINTERFACES'}{'all'} = '';
 241         $checked{'GUARDIAN_BLOCKINTERFACES'}{$settings{'GUARDIAN_BLOCKINTERFACES'}} = "checked='checked'";
 242
 243
 244         &Header::openpage($Lang::tr{'guardian configuration'}, 1, '');
 245         &Header::openbigbox('100%', 'left', '', $errormessage);
 246
 247         # Print errormessage if there is one.
 248         if ($errormessage) {
 249                 &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 250                 print "<font class='base'>$errormessage&nbsp;</font>\n";
 251                 &Header::closebox();
 252         }
 253
 254
 255         # Draw current guardian state.
 256         &Header::openbox('100%', 'center', $Lang::tr{'guardian'});
 257
 258         # Check if guardian is running and grab some stats.
 259         &daemonstats();
 260
 261         # Display some useful information related to guardian, if daemon is running.
 262         if ( ($memory != 0) && (@pid[0] ne "///") ){
 263                 print <<END;
 264                         <table width='95%' cellspacing='0' class='tbl'>
 265                                 <tr>
 266                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 267                                 </tr>
 268                                 <tr>
 269                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 270                                         <td align='center' colspan='2' width='75%' bgcolor='${Header::colourgreen}'><font color='white'><strong>$Lang::tr{'running'}</strong></font></td>
 271                                 </tr>
 272                                 <tr>
 273                                         <td class='base'></td>
 274                                         <td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
 275                                         <td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
 276                                 </tr>
 277                                 <tr>
 278                                         <td class='base'></td>
 279                                         <td bgcolor='$color{'color22'}' align='center'>@pid[0]</td>
 280                                         <td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
 281                                 </tr>
 282                         </table>
 283 END
 284         } else {
 285                 # Otherwise display a hint that the service is not launched.
 286                 print <<END;
 287                         <table width='95%' cellspacing='0' class='tbl'>
 288                                 <tr>
 289                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 290                                 </tr>
 291                                 <tr>
 292                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 293                                         <td align='center' width='75%' bgcolor='${Header::colourred}'><font color='white'><strong>$Lang::tr{'stopped'}</strong></font></td>
 294                                 </tr>
 295                         </table>
 296 END
 297         }
 298
 299         &Header::closebox();
 300
 301         # Draw elements for guardian configuration.
 302         &Header::openbox('100%', 'center', $Lang::tr{'guardian configuration'});
 303
 304         print <<END;
 305                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 306
 307                 <table width='95%'>
 308                         <tr>
 309                                 <td colspan='5' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian common settings'}</b></td>
 310                         </tr>
 311                         <tr>
 312                                 <td width='20%' class='base'>$Lang::tr{'guardian enabled'}:</td>
 313                                 <td width='30%'><input type='checkbox' name='GUARDIAN_ENABLED' $checked{'GUARDIAN_ENABLED'}{'on'} /></td>
 314                                 <td width='20%' class='base'>$Lang::tr{'guardian blockinterfaces'}:</td>
 315                                 <td width='15%'> $Lang::tr{'guardian blockinterfaces default'}
 316                                         <input type='radio' name='GUARDIAN_BLOCKINTERFACES' value='default' $checked{'GUARDIAN_BLOCKINTERFACES'}{'default'} /></td>
 317                                 <td width='15%'> $Lang::tr{'guardian blockinterfaces all'}
 318                                         <input type='radio' name='GUARDIAN_BLOCKINTERFACES' value='all' $checked{'GUARDIAN_BLOCKINTERFACES'}{'all'} /></td>
 319
 320                         </tr>
 321                         <tr>
 322                                 <td width='20%' class='base'>$Lang::tr{'guardian blocktime'}:</td>
 323                                 <td colspan='5'><input type='text' name='GUARDIAN_BLOCKTIME' value='$settings{'GUARDIAN_BLOCKTIME'}' size='10' /></td>
 324                         </tr>
 325                         <tr>
 326                                 <td width='20%' class='base'>$Lang::tr{'guardian logfile'}:</td>
 327                                 <td colspan='5'><input type='text' name='GUARDIAN_LOGFILE' value='$settings{'GUARDIAN_LOGFILE'}' size='30' /></td>
 328                         </tr>
 329                         <tr>
 330                                 <td width='20%' class='base'>$Lang::tr{'guardian snort alertfile'}:</td>
 331                                 <td colspan='5'><input type='text' name='GUARDIAN_SNORT_ALERTFILE' value='$settings{'GUARDIAN_SNORT_ALERTFILE'}' size='30' /></td>
 332                         </tr>
 333                 </table>
 334 END
 335
 336         print <<END;
 337                 <hr>
 338
 339                 <table width='95%'>
 340                         <tr>
 341                                 <td>&nbsp;</td>
 342                                 <td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 343                                 <td>&nbsp;</td>
 344                         </tr>
 345                 </table>
 346         </form>
 347 END
 348
 349         &Header::closebox();
 350 }
 351
 352 # Function to show elements of the guardian ignorefile and allow to add or remove single members of it.
 353 sub showIgnoreBox() {
 354         &Header::openbox('100%', 'center', $Lang::tr{'guardian ignored hosts'});
 355
 356         print <<END;
 357                 <table width='60%'>
 358                         <tr>
 359                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian ignored hosts'}</b></td>
 360                         </tr>
 361 END
 362                         # Check if the guardian ignore file contains any content.
 363                         if (-s $ignorefile) {
 364
 365                                 # Open file and print contents.
 366                                 open FILE, $ignorefile or die "Could not open $ignorefile";
 367
 368                                 my $id = 0;
 369                                 my $col = "";
 370
 371                                 # Read file line by line and print out the elements.
 372                                 while( my $ignored_element = <FILE> )  {
 373
 374                                         # Increase id number for each element in the ignore file.
 375                                         $id++;
 376
 377                                         # Check if the id number is even or not.
 378                                         if ($id % 2) {
 379                                                 $col="bgcolor='$color{'color22'}'";
 380                                         } else {
 381                                                 $col="bgcolor='$color{'color20'}'";
 382                                         }
 383
 384                                         print <<END;
 385                                         <tr>
 386                                                 <td width='80%' class='base' $col>$ignored_element</td>
 387                                                 <td width='20%' align='center' $col>
 388                                                         <form method='post' name='frma$id' action='$ENV{'SCRIPT_NAME'}'>
 389                                                                 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}'>
 390                                                                 <input type='hidden' name='ID' value='$id'>
 391                                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}'>
 392                                                         </form>
 393                                                 </td>
 394                                         </tr>
 395 END
 396                                 }
 397                         close (FILE);
 398                         } else {
 399                                 # Print notice that currently no elements are stored in the ignore file.
 400                                 print "<tr>\n";
 401                                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 402                                 print "</tr>\n";
 403                         }
 404
 405                 print "</table>\n";
 406
 407         &Header::closebox();
 408
 409         # Section to add new elements to the ignore list.
 410         print <<END;
 411         <div class='post' align='center'>
 412                 <table width='60%'>
 413                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 414                         <tr>
 415                                 <td width='30%'>$Lang::tr{'dnsforward add a new entry'}: </td>
 416                                 <td width='50%'><input type='text' name='NEW_IGNORE_ENTRY' value='' size='24' /></td>
 417                                 <td align='center' width='20%'><input type='submit' name='ACTION' value='$Lang::tr{'add'}' /></td>
 418                         </tr>
 419                         </form>
 420                 </table>
 421         </div>
 422 END
 423 }
 424
 425 # Function to list currently bocked addresses from guardian and unblock them or add custom entries to block.
 426 sub showBlockedBox() {
 427         &Header::openbox('100%', 'center', $Lang::tr{'guardian blocked hosts'});
 428
 429         # Lauch helper to get chains from iptables.
 430         open(FILE, "/usr/local/bin/guardianctrl get-chain |");
 431
 432         print <<END;
 433         <table width='60%'>
 434                 <tr>
 435                         <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian blocked hosts'}</b></td>
 436                 </tr>
 437 END
 438
 439                 my $id = 0;
 440                 my $address = "";
 441                 my $col = "";
 442                 my $interface = "";
 443
 444                 # Read file line by line and print out the elements.
 445                 foreach my $line (<FILE>) {
 446                         # Skip descriptive lines.
 447                         next if ($line =~ /^Chain/);
 448                         next if ($line =~ /^ pkts/);
 449
 450                         # Generate array based on the line content (seperator is a single or multiple space's)
 451                         my @comps = split(/\s{1,}/, $line);
 452                         my ($lead, $pkts, $bytes, $target, $prot, $opt, $in, $out, $source, $destination) = @comps;
 453
 454                         # Assign different variable names.
 455                         my $blocked_host = $source;
 456
 457                         # Increase id number for each element in the ignore file.
 458                         $id++;
 459
 460                         # Check if the id number is even or not.
 461                         if ($id % 2) {
 462                                 $col="bgcolor='$color{'color22'}'";
 463                         } else {
 464                                 $col="bgcolor='$color{'color20'}'";
 465                         }
 466
 467                         print <<END;
 468                         <tr>
 469                                 <td width='80%' class='base' $col><a href='/cgi-bin/ipinfo.cgi?ip=$blocked_host'>$blocked_host</a></td>
 470                                 <td width='20%' align='center' $col>
 471                                         <form method='post' name='frmb$id' action='$ENV{'SCRIPT_NAME'}'>
 472                                                 <input type='image' name='$Lang::tr{'unblock'}' src='/images/delete.gif' title='$Lang::tr{'unblock'}' alt='$Lang::tr{'unblock'}'>
 473                                                 <input type='hidden' name='ADDRESS_UNBLOCK' value='$blocked_host'>
 474                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'unblock'}'>
 475                                         </form>
 476                                 </td>
 477                         </tr>
 478 END
 479                 }
 480
 481         close (FILE);
 482
 483         # If the loop only has been runs once the id still is "0", which means there are no
 484         # additional entries (blocked hosts) in the iptables chain.
 485         if ($id == 0) {
 486
 487                 # Print notice that currently no hosts are blocked.
 488                 print "<tr>\n";
 489                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 490                 print "</tr>\n";
 491         }
 492
 493         print "</table>\n";
 494
 495         &Header::closebox();
 496
 497         # Section for a manual block of an IP-address.
 498         print <<END;
 499         <div class='post' align='center'>
 500                 <table width='60%'>
 501                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 502                         <tr>
 503                                 <td width='30%'>$Lang::tr{'guardian block a host'}: </td>
 504                                 <td width='40%'><input type='text' name='ADDRESS_BLOCK' value='' size='24' /></td>
 505                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'block'}'></td>
 506                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'unblock all'}'></td>
 507                         </tr>
 508                         </form>
 509                 </table>
 510         </div>
 511 END
 512 }
 513
 514 &Header::closebigbox();
 515 &Header::closepage();
 516
 517 # Function to check if guardian has been started.
 518 # Grab process id and consumed memory if the daemon is running.
 519 sub daemonstats() {
 520         $memory = 0;
 521         # for pid and memory
 522         open(FILE, '/usr/local/bin/addonctrl guardian status | ');
 523         @guardian = <FILE>;
 524         close(FILE);
 525         $string = join("", @guardian);
 526         $string =~ s/[a-z_]//gi;
 527         $string =~ s/\[[0-1]\;[0-9]+//gi;
 528         $string =~ s/[\(\)\.]//gi;
 529         $string =~ s/  //gi;
 530         $string =~ s/\e//gi;
 531         @pid = split(/\s/,$string);
 532         if (open(FILE, "/proc/$pid[0]/statm")){
 533                 my $temp = <FILE>;
 534                 @memory = split(/ /,$temp);
 535                 close(FILE);
 536         }
 537         $memory+=$memory[0];
 538 }
 539
 540 sub BuildConfiguration() {
 541         my %settings = ();
 542         &General::readhash("${General::swroot}/guardian/settings", \%settings);
 543
 544         my $configfile = "${General::swroot}/guardian/guardian.conf";
 545
 546         # We set this to 1 (enabled) to prevent guardian from blocking the ISP gateway.
 547         my $HostGatewayByte = "1";
 548
 549         # Grab interface of red network zone.
 550         my $red_interface = &General::get_red_interface();
 551
 552         # Open configfile for writing.
 553         open(FILE, ">$configfile");
 554
 555         print FILE "Interface           $red_interface\n";
 556         print FILE "BlockOption         $settings{'GUARDIAN_BLOCKINTERFACES'}\n";
 557         print FILE "HostGatewayByte     $HostGatewayByte\n";
 558         print FILE "LogFile             $settings{'GUARDIAN_LOGFILE'}\n";
 559         print FILE "AlertFile           $settings{'GUARDIAN_SNORT_ALERTFILE'}\n";
 560         print FILE "IgnoreFile          $ignorefile\n";
 561         print FILE "TargetFile          $targetfile\n";
 562         print FILE "TimeLimit           $settings{'GUARDIAN_BLOCKTIME'}\n";
 563
 564         close(FILE);
 565
 566         # Restart the service.
 567         if ($settings{'GUARDIAN_ENABLED'} eq 'on') {
 568                 system("/usr/local/bin/guardianctrl restart &>/dev/null");
 569         } else {
 570                 system("/usr/local/bin/guardianctrl stop &>/dev/null");
 571         }
 572 }