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