html/cgi-bin/guardian.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2016  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::Codes::Country;
  24
  25 # enable only the following on debugging purpose
  26 #use warnings;
  27 #use CGI::Carp 'fatalsToBrowser';
  28
  29 require '/var/ipfire/general-functions.pl';
  30 require "${General::swroot}/lang.pl";
  31 require "${General::swroot}/header.pl";
  32
  33 #workaround to suppress a warning when a variable is used only once
  34 my @dummy = (
  35         ${Header::colourred},
  36         ${Header::colourgreen}
  37 );
  38
  39 undef (@dummy);
  40
  41 my $string=();
  42 my $memory=();
  43 my @memory=();
  44 my @pid=();
  45 my @guardian=();
  46
  47 # Path to the guardian.ignore file.
  48 my $ignorefile ='/var/ipfire/guardian/guardian.ignore';
  49
  50 our %netsettings = ();
  51 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  52
  53 our %color = ();
  54 our %mainsettings = ();
  55 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  56 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  57
  58 # Pakfire meta file for owncloud.
  59 # (File exists when the addon is installed.)
  60 my $owncloud_meta = "/opt/pakfire/db/installed/meta-owncloud";
  61
  62 our %settings = ();
  63
  64 $settings{'ACTION'} = '';
  65
  66 $settings{'GUARDIAN_ENABLED'} = 'off';
  67 $settings{'GUARDIAN_MONITOR_SNORT'} = 'on';
  68 $settings{'GUARDIAN_MONITOR_SSH'} = 'on';
  69 $settings{'GUARDIAN_MONITOR_HTTPD'} = 'on';
  70 $settings{'GUARDIAN_MONITOR_OWNCLOUD'} = '';
  71 $settings{'GUARDIAN_LOGLEVEL'} = 'info';
  72 $settings{'GUARDIAN_BLOCKCOUNT'} = '3';
  73 $settings{'GUARDIAN_BLOCKTIME'} = '86400';
  74 $settings{'GUARDIAN_LOGFILE'} = '/var/log/guardian/guardian.log';
  75 $settings{'GUARDIAN_PRIORITY_LEVEL'} = '3';
  76
  77 # Default settings for owncloud if installed.
  78 if ( -e "$owncloud_meta") {
  79         $settings{'GUARDIAN_MONITOR_OWNCLOUD'} = 'off';
  80 }
  81
  82 my $errormessage = '';
  83
  84 &Header::showhttpheaders();
  85
  86 # Get GUI values.
  87 &Header::getcgihash(\%settings);
  88
  89 # Check if guardian is running and grab some stats.
  90 &daemonstats();
  91 my $pid = $pid[0];
  92
  93 ## Perform input checks and save settings.
  94 #
  95 if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
  96         # Check for valid blocktime.
  97         unless(($settings{'GUARDIAN_BLOCKTIME'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKTIME'} ne "0")) {
  98                         $errormessage = "$Lang::tr{'guardian invalid blocktime'}";
  99         }
 100
 101         # Check if the bloccount is valid.
 102         unless(($settings{'GUARDIAN_BLOCKCOUNT'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKCOUNT'} ne "0")) {
 103                         $errormessage = "$Lang::tr{'guardian invalid blockcount'}";
 104         }
 105
 106         # Check Logfile.
 107         unless($settings{'GUARDIAN_LOGFILE'} =~ /^[a-zA-Z0-9\.\/]+$/) {
 108                 $errormessage = "$Lang::tr{'guardian invalid logfile'}";
 109         }
 110
 111         # Only continue if no error message has been set.
 112         if($errormessage eq '') {
 113                 # Write configuration settings to file.
 114                 &General::writehash("${General::swroot}/guardian/settings", \%settings);
 115
 116                 # Update configuration files.
 117                 &BuildConfiguration();
 118         }
 119
 120 ## Add a new entry to the ignore file.
 121 #
 122 } elsif ($settings{'ACTION'} eq $Lang::tr{'add'}) {
 123
 124         # Check if any input has been performed.
 125         if ($settings{'NEW_IGNORE_ENTRY'} ne '') {
 126
 127                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 128                 if ((!&General::validip($settings{'NEW_IGNORE_ENTRY'})) && (!&General::validipandmask($settings{'NEW_IGNORE_ENTRY'}))) {
 129                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 130                 }
 131         } else {
 132                 $errormessage = "$Lang::tr{'guardian empty input'}";
 133         }
 134
 135         # Go further if there was no error.
 136         if ($errormessage eq '') {
 137                 my $new_entry = $settings{'NEW_IGNORE_ENTRY'};
 138
 139                 # Open file for appending the new entry.
 140                 open (FILE, ">>$ignorefile") or die "Unable to open $ignorefile for writing";
 141
 142                 # Write the new entry to the ignore file.
 143                 print FILE "$new_entry\n";
 144                 close(FILE);
 145         }
 146
 147         # Check if guardian is running.
 148         if ($pid > 0) {
 149                 # Call guardianctrl to perform a reload.
 150                 system("/usr/local/bin/guardianctrl reload &>/dev/null");
 151         }
 152
 153 ## Remove entry from ignore list.
 154 #
 155 } elsif ($settings{'ACTION'} eq $Lang::tr{'remove'}) {
 156         my $id = 0;
 157
 158         # Open ignorefile and read content.
 159         open(FILE, "<$ignorefile") or die "Unable to open $ignorefile.";
 160         my @current = <FILE>;
 161         close(FILE);
 162
 163         # Re-open ignorefile for writing.
 164         open(FILE, ">$ignorefile") or die "Unable to open $ignorefile for writing";
 165         flock FILE, 2;
 166
 167         # Read line by line from ignorefile and write them back except the line with the given ID.
 168         # So this line is missing in the new file and the entry has been deleted.
 169         foreach my $line (@current) {
 170                 $id++;
 171                 unless ($settings{'ID'} eq $id) {
 172                         print FILE "$line";
 173                 }
 174         }
 175         close(FILE);
 176
 177         # Check if guardian is running.
 178         if ($pid > 0) {
 179                 # Call guardianctrl to perform a reload.
 180                 system("/usr/local/bin/guardianctrl reload &>/dev/null");
 181         }
 182
 183 ## Block a user given address or subnet.
 184 #
 185 } elsif ($settings{'ACTION'} eq $Lang::tr{'block'}) {
 186
 187         # Assign some temporary variables used for input validation.
 188         my $input = $settings{'ADDRESS_BLOCK'};
 189         my $green = $netsettings{'GREEN_ADDRESS'};
 190         my $blue = $netsettings{'BLUE_ADDRESS'};
 191         my $orange = $netsettings{'ORANGE_ADDRESS'};
 192         my $red = $netsettings{'RED_ADDRESS'};
 193
 194         # Get gateway address.
 195         my $gateway = &General::get_gateway();
 196
 197         # Check if any input has been performed.
 198         if ($input eq '') {
 199                 $errormessage = "$Lang::tr{'guardian empty input'}";
 200         }
 201
 202         # Check if the given input is localhost (127.0.0.1).
 203         elsif ($input eq "127.0.0.1") {
 204                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 205         }
 206
 207         # Check if the given input is anywhere (0.0.0.0).
 208         elsif ($input eq "0.0.0.0") {
 209                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 210         }
 211
 212         # Check if the given input is one of the interface addresses or our gateway.
 213         elsif ($input eq "$green" || $input eq "$blue" || $input eq "$orange" || $input eq "$red" || $input eq "$gateway") {
 214                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 215         }
 216
 217         # Check if the given input is a valid IP address.
 218         elsif (!&General::validip($input)) {
 219                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 220         }
 221
 222         # Go further if there was no error.
 223         if ($errormessage eq '') {
 224                 my $block = $settings{'ADDRESS_BLOCK'};
 225
 226                 # Call helper to unblock address.
 227                 system("/usr/local/bin/guardianctrl block $block &>/dev/null");
 228         }
 229
 230 ## Unblock address or subnet.
 231 #
 232 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock'}) {
 233
 234         # Check if no empty input has been performed.
 235         if ($settings{'ADDRESS_UNBLOCK'} ne '') {
 236
 237                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 238                 if ((!&General::validip($settings{'ADDRESS_UNBLOCK'})) && (!&General::validipandmask($settings{'ADDRESS_UNBLOCK'}))) {
 239                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 240                 }
 241
 242         } else {
 243                 $errormessage = "$Lang::tr{'guardian empty input'}";
 244         }
 245
 246         # Go further if there was no error.
 247         if ($errormessage eq '') {
 248                 my $unblock = $settings{'ADDRESS_UNBLOCK'};
 249
 250                 # Call helper to unblock address.
 251                 system("/usr/local/bin/guardianctrl unblock $unblock &>/dev/null");
 252         }
 253
 254 ## Unblock all.
 255 #
 256 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock all'}) {
 257
 258         # Call helper to flush iptables chain from guardian.
 259         system("/usr/local/bin/guardianctrl flush-chain &>/dev/null");
 260 }
 261
 262 # Load settings from file.
 263 &General::readhash("${General::swroot}/guardian/settings", \%settings);
 264
 265 # Call functions to generate whole page.
 266 &showMainBox();
 267 &showIgnoreBox();
 268
 269 # Display area only if guardian is running.
 270 if ( ($memory != 0) && ($pid > 0) ) {
 271         &showBlockedBox();
 272 }
 273
 274 # Function to display the status of guardian and allow base configuration.
 275 sub showMainBox() {
 276         my %checked = ();
 277         my %selected = ();
 278
 279         $checked{'GUARDIAN_ENABLED'}{'on'} = '';
 280         $checked{'GUARDIAN_ENABLED'}{'off'} = '';
 281         $checked{'GUARDIAN_ENABLED'}{$settings{'GUARDIAN_ENABLED'}} = 'checked';
 282         $checked{'GUARDIAN_MONITOR_SNORT'}{'off'} = '';
 283         $checked{'GUARDIAN_MONITOR_SNORT'}{'on'} = '';
 284         $checked{'GUARDIAN_MONITOR_SNORT'}{$settings{'GUARDIAN_MONITOR_SNORT'}} = "checked='checked'";
 285         $checked{'GUARDIAN_MONITOR_SSH'}{'off'} = '';
 286         $checked{'GUARDIAN_MONITOR_SSH'}{'on'} = '';
 287         $checked{'GUARDIAN_MONITOR_SSH'}{$settings{'GUARDIAN_MONITOR_SSH'}} = "checked='checked'";
 288         $checked{'GUARDIAN_MONITOR_HTTPD'}{'off'} = '';
 289         $checked{'GUARDIAN_MONITOR_HTTPD'}{'on'} = '';
 290         $checked{'GUARDIAN_MONITOR_HTTPD'}{$settings{'GUARDIAN_MONITOR_HTTPD'}} = "checked='checked'";
 291         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'off'} = '';
 292         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'on'} = '';
 293         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{$settings{'GUARDIAN_MONITOR_OWNCLOUD'}} = "checked='checked'";
 294
 295         $selected{'GUARDIAN_LOGLEVEL'}{$settings{'GUARDIAN_LOGLEVEL'}} = 'selected';
 296         $selected{'GUARDIAN_PRIORITY_LEVEL'}{$settings{'GUARDIAN_PRIORITY_LEVEL'}} = 'selected';
 297
 298         &Header::openpage($Lang::tr{'guardian configuration'}, 1, '');
 299         &Header::openbigbox('100%', 'left', '', $errormessage);
 300
 301         # Print errormessage if there is one.
 302         if ($errormessage) {
 303                 &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 304                 print "<font class='base'>$errormessage&nbsp;</font>\n";
 305                 &Header::closebox();
 306         }
 307
 308
 309         # Draw current guardian state.
 310         &Header::openbox('100%', 'center', $Lang::tr{'guardian'});
 311
 312         # Get current status of guardian.
 313         &daemonstats();
 314         $pid = $pid[0];
 315
 316         # Display some useful information related to guardian, if daemon is running.
 317         if ( ($memory != 0) && ($pid > 0) ){
 318                 print <<END;
 319                         <table width='95%' cellspacing='0' class='tbl'>
 320                                 <tr>
 321                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 322                                 </tr>
 323                                 <tr>
 324                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 325                                         <td align='center' colspan='2' width='75%' bgcolor='${Header::colourgreen}'><font color='white'><strong>$Lang::tr{'running'}</strong></font></td>
 326                                 </tr>
 327                                 <tr>
 328                                         <td class='base'></td>
 329                                         <td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
 330                                         <td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
 331                                 </tr>
 332                                 <tr>
 333                                         <td class='base'></td>
 334                                         <td bgcolor='$color{'color22'}' align='center'>$pid</td>
 335                                         <td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
 336                                 </tr>
 337                         </table>
 338 END
 339         } else {
 340                 # Otherwise display a hint that the service is not launched.
 341                 print <<END;
 342                         <table width='95%' cellspacing='0' class='tbl'>
 343                                 <tr>
 344                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 345                                 </tr>
 346                                 <tr>
 347                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 348                                         <td align='center' width='75%' bgcolor='${Header::colourred}'><font color='white'><strong>$Lang::tr{'stopped'}</strong></font></td>
 349                                 </tr>
 350                         </table>
 351 END
 352         }
 353
 354         &Header::closebox();
 355
 356         # Draw elements for guardian configuration.
 357         &Header::openbox('100%', 'center', $Lang::tr{'guardian configuration'});
 358
 359         print <<END;
 360                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 361
 362                 <table width='95%'>
 363                         <tr>
 364                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian common settings'}</b></td>
 365                         </tr>
 366                         <tr>
 367                                 <td width='20%' class='base'>$Lang::tr{'guardian enabled'}:</td>
 368                                 <td><input type='checkbox' name='GUARDIAN_ENABLED' $checked{'GUARDIAN_ENABLED'}{'on'} /></td>
 369                         </tr>
 370                         <tr>
 371                                 <td colspan='2'><br></td>
 372                         </tr>
 373                         <tr>
 374                                 <td width='20%' class='base'>$Lang::tr{'guardian watch snort alertfile'}</td>
 375                                 <td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_SNORT' value='on' $checked{'GUARDIAN_MONITOR_SNORT'}{'on'} /> /
 376                                 <input type='radio' name='GUARDIAN_MONITOR_SNORT' value='off' $checked{'GUARDIAN_MONITOR_SNORT'}{'off'} /> off</td>
 377                         </tr>
 378                         <tr>
 379                                 <td width='20%' class='base'>$Lang::tr{'guardian block ssh brute-force'}</td>
 380                                 <td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_SSH' value='on' $checked{'GUARDIAN_MONITOR_SSH'}{'on'} /> /
 381                                 <input type='radio' name='GUARDIAN_MONITOR_SSH' value='off' $checked{'GUARDIAN_MONITOR_SSH'}{'off'} /> off</td>
 382                         </tr>
 383                         <tr>
 384                                 <td width='20%' class='base'>$Lang::tr{'guardian block httpd brute-force'}</td>
 385                                 <td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_HTTPD' value='on' $checked{'GUARDIAN_MONITOR_HTTPD'}{'on'} /> /
 386                                 <input type='radio' name='GUARDIAN_MONITOR_HTTPD' value='off' $checked{'GUARDIAN_MONITOR_HTTPD'}{'off'} /> off</td>
 387                         </tr>
 388 END
 389                         # Display owncloud checkbox when the addon is installed.
 390                         if ( -e "$owncloud_meta" ) {
 391                                 print"<tr>\n";
 392                                 print"<td width='20%' class='base'>$Lang::tr{'guardian block owncloud brute-force'}</td>\n";
 393                                 print"<td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_OWNCLOUD' value='on' $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'on'} /> /\n";
 394                                 print"<input type='radio' name='GUARDIAN_MONITOR_OWNCLOUD' value='off' $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'off'} /> off</td>\n";
 395                                 print"</tr>\n";
 396                         }
 397         print <<END;
 398                         <tr>
 399                                 <td colspan='2'><br></td>
 400                         </tr>
 401                         <tr>
 402                                 <td align='left' width='20%'>$Lang::tr{'guardian loglevel'}:</td>
 403                                 <td><select name='GUARDIAN_LOGLEVEL'>
 404                                         <option value='off' $selected{'GUARDIAN_LOGLEVEL'}{'off'}>off</option>
 405                                         <option value='info' $selected{'GUARDIAN_LOGLEVEL'}{'info'}>info</option>
 406                                         <option value='debug' $selected{'GUARDIAN_LOGLEVEL'}{'debug'}>debug</option>
 407                                 </select></td>
 408                         </tr>
 409                         <tr>
 410                                 <td colspan='2'><br></td>
 411                         </tr>
 412                         <tr>
 413                                 <td align='left' width='20%'>$Lang::tr{'guardian priority level'}:</td>
 414                                 <td><select name='GUARDIAN_PRIORITY_LEVEL'>
 415                                         <option value='1' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'1'}>1</option>
 416                                         <option value='2' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'2'}>2</option>
 417                                         <option value='3' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'3'}>3</option>
 418                                         <option value='4' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'4'}>4</option>
 419                                 </select></td>
 420                         </tr>
 421                         <tr>
 422                                 <td colspan='2'><br></td>
 423                         </tr>
 424                         <tr>
 425                                 <td width='20%' class='base'>$Lang::tr{'guardian blockcount'}:</td>
 426                                 <td><input type='text' name='GUARDIAN_BLOCKCOUNT' value='$settings{'GUARDIAN_BLOCKCOUNT'}' size='5' /></td>
 427                         </tr>
 428                         <tr>
 429                                 <td width='20%' class='base'>$Lang::tr{'guardian blocktime'}:</td>
 430                                 <td><input type='text' name='GUARDIAN_BLOCKTIME' value='$settings{'GUARDIAN_BLOCKTIME'}' size='10' /></td>
 431                         </tr>
 432                         <tr>
 433                                 <td width='20%' class='base'>$Lang::tr{'guardian logfile'}:</td>
 434                                 <td><input type='text' name='GUARDIAN_LOGFILE' value='$settings{'GUARDIAN_LOGFILE'}' size='30' /></td>
 435                         </tr>
 436                 </table>
 437 END
 438
 439         print <<END;
 440                 <hr>
 441
 442                 <table width='95%'>
 443                         <tr>
 444                                 <td>&nbsp;</td>
 445                                 <td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 446                                 <td>&nbsp;</td>
 447                         </tr>
 448                 </table>
 449         </form>
 450 END
 451
 452         &Header::closebox();
 453 }
 454
 455 # Function to show elements of the guardian ignorefile and allow to add or remove single members of it.
 456 sub showIgnoreBox() {
 457         &Header::openbox('100%', 'center', $Lang::tr{'guardian ignored hosts'});
 458
 459         print <<END;
 460                 <table width='60%'>
 461                         <tr>
 462                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian ignored hosts'}</b></td>
 463                         </tr>
 464 END
 465                         # Check if the guardian ignore file contains any content.
 466                         if (-s $ignorefile) {
 467
 468                                 # Open file and print contents.
 469                                 open FILE, $ignorefile or die "Could not open $ignorefile";
 470
 471                                 my $id = 0;
 472                                 my $col = "";
 473
 474                                 # Read file line by line and print out the elements.
 475                                 while( my $ignored_element = <FILE> )  {
 476
 477                                         # Increase id number for each element in the ignore file.
 478                                         $id++;
 479
 480                                         # Check if the id number is even or not.
 481                                         if ($id % 2) {
 482                                                 $col="bgcolor='$color{'color22'}'";
 483                                         } else {
 484                                                 $col="bgcolor='$color{'color20'}'";
 485                                         }
 486
 487                                         print <<END;
 488                                         <tr>
 489                                                 <td width='80%' class='base' $col>$ignored_element</td>
 490                                                 <td width='20%' align='center' $col>
 491                                                         <form method='post' name='$id' action='$ENV{'SCRIPT_NAME'}'>
 492                                                                 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}'>
 493                                                                 <input type='hidden' name='ID' value='$id'>
 494                                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}'>
 495                                                         </form>
 496                                                 </td>
 497                                         </tr>
 498 END
 499                                 }
 500                         close (FILE);
 501                         } else {
 502                                 # Print notice that currently no elements are stored in the ignore file.
 503                                 print "<tr>\n";
 504                                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 505                                 print "</tr>\n";
 506                         }
 507
 508                 print "</table>\n";
 509
 510         # Section to add new elements to the ignore list.
 511         print <<END;
 512         <br>
 513         <div align='center'>
 514                 <table width='60%'>
 515                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 516                         <tr>
 517                                 <td width='30%'>$Lang::tr{'dnsforward add a new entry'}: </td>
 518                                 <td width='50%'><input type='text' name='NEW_IGNORE_ENTRY' value='' size='24' /></td>
 519                                 <td align='center' width='20%'><input type='submit' name='ACTION' value='$Lang::tr{'add'}' /></td>
 520                         </tr>
 521                         </form>
 522                 </table>
 523         </div>
 524 END
 525
 526         &Header::closebox();
 527 }
 528
 529 # Function to list currently bocked addresses from guardian and unblock them or add custom entries to block.
 530 sub showBlockedBox() {
 531         &Header::openbox('100%', 'center', $Lang::tr{'guardian blocked hosts'});
 532
 533         print <<END;
 534         <table width='60%'>
 535                 <tr>
 536                         <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian blocked hosts'}</b></td>
 537                 </tr>
 538 END
 539
 540                 # Lauch function to get the currently blocked hosts.
 541                 my @blocked_hosts = &GetBlockedHosts();
 542
 543                 my $id = 0;
 544                 my $col = "";
 545
 546                 # Loop through our blocked hosts array.
 547                 foreach my $blocked_host (@blocked_hosts) {
 548
 549                         # Increase id number for each element in the ignore file.
 550                         $id++;
 551
 552                         # Check if the id number is even or not.
 553                         if ($id % 2) {
 554                                 $col="bgcolor='$color{'color22'}'";
 555                         } else {
 556                                 $col="bgcolor='$color{'color20'}'";
 557                         }
 558
 559                         print <<END;
 560                         <tr>
 561                                 <td width='80%' class='base' $col><a href='/cgi-bin/ipinfo.cgi?ip=$blocked_host'>$blocked_host</a></td>
 562                                 <td width='20%' align='center' $col>
 563                                         <form method='post' name='frmb$id' action='$ENV{'SCRIPT_NAME'}'>
 564                                                 <input type='image' name='$Lang::tr{'unblock'}' src='/images/delete.gif' title='$Lang::tr{'unblock'}' alt='$Lang::tr{'unblock'}'>
 565                                                 <input type='hidden' name='ADDRESS_UNBLOCK' value='$blocked_host'>
 566                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'unblock'}'>
 567                                         </form>
 568                                 </td>
 569                         </tr>
 570 END
 571                 }
 572
 573         # If the loop only has been runs once the id still is "0", which means there are no
 574         # additional entries (blocked hosts) in the iptables chain.
 575         if ($id == 0) {
 576
 577                 # Print notice that currently no hosts are blocked.
 578                 print "<tr>\n";
 579                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 580                 print "</tr>\n";
 581         }
 582
 583         print "</table>\n";
 584
 585         # Section for a manual block of an IP-address.
 586         print <<END;
 587         <br>
 588         <div align='center'>
 589                 <table width='60%' border='0'>
 590                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 591                         <tr>
 592                                 <td width='30%'>$Lang::tr{'guardian block a host'}: </td>
 593                                 <td width='40%'><input type='text' name='ADDRESS_BLOCK' value='' size='24' /></td>
 594                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'block'}'></td>
 595                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'unblock all'}'></td>
 596                         </tr>
 597                         </form>
 598                 </table>
 599         </div>
 600 END
 601
 602         &Header::closebox();
 603 }
 604
 605 &Header::closebigbox();
 606 &Header::closepage();
 607
 608 # Function to check if guardian has been started.
 609 # Grab process id and consumed memory if the daemon is running.
 610 sub daemonstats() {
 611         $memory = 0;
 612         # for pid and memory
 613         open(FILE, '/usr/local/bin/addonctrl guardian status | ');
 614         @guardian = <FILE>;
 615         close(FILE);
 616         $string = join("", @guardian);
 617         $string =~ s/[a-z_]//gi;
 618         $string =~ s/\[[0-1]\;[0-9]+//gi;
 619         $string =~ s/[\(\)\.]//gi;
 620         $string =~ s/  //gi;
 621         $string =~ s/\e//gi;
 622         @pid = split(/\s/,$string);
 623         if (open(FILE, "/proc/$pid[0]/statm")){
 624                 my $temp = <FILE>;
 625                 @memory = split(/ /,$temp);
 626                 close(FILE);
 627         }
 628         $memory+=$memory[0];
 629 }
 630
 631 sub GetBlockedHosts() {
 632
 633         # Create new, empty array.
 634         my @hosts;
 635
 636         # Lauch helper to get chains from iptables.
 637         open(FILE, "/usr/local/bin/guardianctrl get-chain |");
 638
 639         # Read file line by line and print out the elements.
 640         foreach my $line (<FILE>) {
 641
 642                 # Skip descriptive lines.
 643                 next if ($line =~ /^Chain/);
 644                 next if ($line =~ /^ pkts/);
 645
 646                 # Generate array, based on the line content (seperator is a single or multiple space's)
 647                 my @comps = split(/\s{1,}/, $line);
 648                 my ($lead, $pkts, $bytes, $target, $prot, $opt, $in, $out, $source, $destination) = @comps;
 649
 650                 # Assign different variable names.
 651                 my $blocked_host = $source;
 652
 653                 # Add host to our hosts array.
 654                 push(@hosts, $blocked_host);
 655         }
 656
 657         # Convert entries, sort them, write back and store the sorted entries into new array.
 658         my @sorted = map  { $_->[0] }
 659              sort { $a->[1] <=> $b->[1] }
 660              map  { [$_, int sprintf("%03.f%03.f%03.f%03.f", split(/\./, $_))] }
 661              @hosts;
 662
 663         # Return our sorted list.
 664         return @sorted
 665 }
 666
 667 sub BuildConfiguration() {
 668         my %settings = ();
 669         &General::readhash("${General::swroot}/guardian/settings", \%settings);
 670
 671         my $configfile = "${General::swroot}/guardian/guardian.conf";
 672
 673         # We set this to 1 (enabled) to prevent guardian from blocking the ISP gateway.
 674         my $HostGatewayByte = "1";
 675
 676         # Open configfile for writing.
 677         open(FILE, ">$configfile");
 678
 679         print FILE "EnableSnortMonitoring\t\t$settings{'GUARDIAN_ENABLE_SNORT'}\n";
 680         print FILE "EnableSSHMonitoring\t\t$settings{'GUARDIAN_ENABLE_SSH'}\n";
 681         print FILE "EnableHTTPDMonitoring\t\t$settings{'GUARDIAN_ENABLE_HTTPD'}\n";
 682
 683         # Check if owncloud settings should be written.
 684         if (exists $settings{'GUARDIAN_ENABLE_OWNCLOUD'}) {
 685                 print FILE "EnableOwncloudMonitoring\t$settings{'GUARDIAN_ENABLE_OWNCLOUD'}\n";
 686         }
 687
 688         print FILE "LogLevel\t\t\t$settings{'GUARDIAN_LOGLEVEL'}\n";
 689         print FILE "BlockCount\t\t\t$settings{'GUARDIAN_BLOCKCOUNT'}\n";
 690         print FILE "HostGatewayByte\t\t\t$HostGatewayByte\n";
 691         print FILE "LogFile\t\t\t\t$settings{'GUARDIAN_LOGFILE'}\n";
 692         print FILE "IgnoreFile\t\t\t$ignorefile\n";
 693         print FILE "TimeLimit\t\t\t$settings{'GUARDIAN_BLOCKTIME'}\n";
 694         print FILE "PriorityLevel\t\t\t$settings{'GUARDIAN_PRIORITY_LEVEL'}\n";
 695
 696         close(FILE);
 697
 698         # Check if guardian should be started or stopped.
 699         if($settings{'GUARDIAN_ENABLED'} eq 'on') {
 700                 if($pid > 0) {
 701                         # Call guardianctl to perform a reload.
 702                         system("/usr/local/bin/guardianctrl reload &>/dev/null");
 703                 } else {
 704                         # Launch guardian.
 705                         system("/usr/local/bin/guardianctrl start &>/dev/null");
 706                 }
 707         } else {
 708                 # Stop the daemon.
 709                 system("/usr/local/bin/guardianctrl stop &>/dev/null");
 710         }
 711 }