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 $Lang::tr{'unblock all'}) {
 249
 250         # Call helper to flush iptables chain from guardian.
 251         system("/usr/local/bin/guardianctrl flush-chain &>/dev/null");
 252 }
 253
 254 # Load settings from file.
 255 &General::readhash("${General::swroot}/guardian/settings", \%settings);
 256
 257 # Call functions to generate whole page.
 258 &showMainBox();
 259 &showIgnoreBox();
 260
 261 # Display area only if guardian is running.
 262 if ( ($memory != 0) && ($pid > 0) ) {
 263         &showBlockedBox();
 264 }
 265
 266 # Function to display the status of guardian and allow base configuration.
 267 sub showMainBox() {
 268         my %checked = ();
 269         my %selected = ();
 270
 271         $checked{'GUARDIAN_ENABLED'}{'on'} = '';
 272         $checked{'GUARDIAN_ENABLED'}{'off'} = '';
 273         $checked{'GUARDIAN_ENABLED'}{$settings{'GUARDIAN_ENABLED'}} = 'checked';
 274         $checked{'GUARDIAN_ENABLE_SNORT'}{'off'} = '';
 275         $checked{'GUARDIAN_ENABLE_SNORT'}{'on'} = '';
 276         $checked{'GUARDIAN_ENABLE_SNORT'}{$settings{'GUARDIAN_ENABLE_SNORT'}} = "checked='checked'";
 277         $checked{'GUARDIAN_ENABLE_SSH'}{'off'} = '';
 278         $checked{'GUARDIAN_ENABLE_SSH'}{'on'} = '';
 279         $checked{'GUARDIAN_ENABLE_SSH'}{$settings{'GUARDIAN_ENABLE_SSH'}} = "checked='checked'";
 280         $checked{'GUARDIAN_ENABLE_HTTPD'}{'off'} = '';
 281         $checked{'GUARDIAN_ENABLE_HTTPD'}{'on'} = '';
 282         $checked{'GUARDIAN_ENABLE_HTTPD'}{$settings{'GUARDIAN_ENABLE_HTTPD'}} = "checked='checked'";
 283
 284         $selected{'GUARDIAN_LOGLEVEL'}{$settings{'GUARDIAN_LOGLEVEL'}} = 'selected';
 285         $selected{'GUARDIAN_PRIORITY_LEVEL'}{$settings{'GUARDIAN_PRIORITY_LEVEL'}} = 'selected';
 286
 287         &Header::openpage($Lang::tr{'guardian configuration'}, 1, '');
 288         &Header::openbigbox('100%', 'left', '', $errormessage);
 289
 290         # Print errormessage if there is one.
 291         if ($errormessage) {
 292                 &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 293                 print "<font class='base'>$errormessage&nbsp;</font>\n";
 294                 &Header::closebox();
 295         }
 296
 297
 298         # Draw current guardian state.
 299         &Header::openbox('100%', 'center', $Lang::tr{'guardian'});
 300
 301         # Get current status of guardian.
 302         &daemonstats();
 303         $pid = @pid[0];
 304
 305         # Display some useful information related to guardian, if daemon is running.
 306         if ( ($memory != 0) && ($pid > 0) ){
 307                 print <<END;
 308                         <table width='95%' cellspacing='0' class='tbl'>
 309                                 <tr>
 310                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 311                                 </tr>
 312                                 <tr>
 313                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 314                                         <td align='center' colspan='2' width='75%' bgcolor='${Header::colourgreen}'><font color='white'><strong>$Lang::tr{'running'}</strong></font></td>
 315                                 </tr>
 316                                 <tr>
 317                                         <td class='base'></td>
 318                                         <td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
 319                                         <td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
 320                                 </tr>
 321                                 <tr>
 322                                         <td class='base'></td>
 323                                         <td bgcolor='$color{'color22'}' align='center'>@pid[0]</td>
 324                                         <td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
 325                                 </tr>
 326                         </table>
 327 END
 328         } else {
 329                 # Otherwise display a hint that the service is not launched.
 330                 print <<END;
 331                         <table width='95%' cellspacing='0' class='tbl'>
 332                                 <tr>
 333                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 334                                 </tr>
 335                                 <tr>
 336                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 337                                         <td align='center' width='75%' bgcolor='${Header::colourred}'><font color='white'><strong>$Lang::tr{'stopped'}</strong></font></td>
 338                                 </tr>
 339                         </table>
 340 END
 341         }
 342
 343         &Header::closebox();
 344
 345         # Draw elements for guardian configuration.
 346         &Header::openbox('100%', 'center', $Lang::tr{'guardian configuration'});
 347
 348         print <<END;
 349                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 350
 351                 <table width='95%'>
 352                         <tr>
 353                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian common settings'}</b></td>
 354                         </tr>
 355                         <tr>
 356                                 <td width='20%' class='base'>$Lang::tr{'guardian enabled'}:</td>
 357                                 <td><input type='checkbox' name='GUARDIAN_ENABLED' $checked{'GUARDIAN_ENABLED'}{'on'} /></td>
 358                         </tr>
 359                         <tr>
 360                                 <td colspan='2'><br></td>
 361                         </tr>
 362                         <tr>
 363                                 <td width='20%' class='base'>$Lang::tr{'guardian watch snort alertfile'}</td>
 364                                 <td align='left'>on <input type='radio' name='GUARDIAN_ENABLE_SNORT' value='on' $checked{'GUARDIAN_ENABLE_SNORT'}{'on'} /> /
 365                                 <input type='radio' name='GUARDIAN_ENABLE_SNORT' value='off' $checked{'GUARDIAN_ENABLE_SNORT'}{'off'} /> off</td>
 366                         </tr>
 367                         <tr>
 368                                 <td width='20%' class='base'>$Lang::tr{'guardian block ssh brute-force'}</td>
 369                                 <td align='left'>on <input type='radio' name='GUARDIAN_ENABLE_SSH' value='on' $checked{'GUARDIAN_ENABLE_SSH'}{'on'} /> /
 370                                 <input type='radio' name='GUARDIAN_ENABLE_SSH' value='off' $checked{'GUARDIAN_ENABLE_SSH'}{'off'} /> off</td>
 371                         </tr>
 372                         <tr>
 373                                 <td width='20%' class='base'>$Lang::tr{'guardian block httpd brute-force'}</td>
 374                                 <td align='left'>on <input type='radio' name='GUARDIAN_ENABLE_HTTPD' value='on' $checked{'GUARDIAN_ENABLE_HTTPD'}{'on'} /> /
 375                                 <input type='radio' name='GUARDIAN_ENABLE_HTTPD' value='off' $checked{'GUARDIAN_ENABLE_HTTPD'}{'off'} /> off</td>
 376                         </tr>
 377                         <tr>
 378                                 <td colspan='2'><br></td>
 379                         </tr>
 380                         <tr>
 381                                 <td align='left' width='20%'>$Lang::tr{'guardian loglevel'}:</td>
 382                                 <td><select name='GUARDIAN_LOGLEVEL'>
 383                                         <option value='off' $selected{'GUARDIAN_LOGLEVEL'}{'off'}>off</option>
 384                                         <option value='info' $selected{'GUARDIAN_LOGLEVEL'}{'info'}>info</option>
 385                                         <option value='debug' $selected{'GUARDIAN_LOGLEVEL'}{'debug'}>debug</option>
 386                                 </select></td>
 387                         </tr>
 388                         <tr>
 389                                 <td colspan='2'><br></td>
 390                         </tr>
 391                         <tr>
 392                                 <td align='left' width='20%'>$Lang::tr{'guardian priority level'}:</td>
 393                                 <td><select name='GUARDIAN_PRIORITY_LEVEL'>
 394                                         <option value='1' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'1'}>1</option>
 395                                         <option value='2' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'2'}>2</option>
 396                                         <option value='3' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'3'}>3</option>
 397                                         <option value='4' $selected{'GUARDIAN_PRIORITY_LEVEL'}{'4'}>4</option>
 398                                 </select></td>
 399                         </tr>
 400                         <tr>
 401                                 <td colspan='2'><br></td>
 402                         </tr>
 403                         <tr>
 404                                 <td width='20%' class='base'>$Lang::tr{'guardian blockcount'}:</td>
 405                                 <td><input type='text' name='GUARDIAN_BLOCKCOUNT' value='$settings{'GUARDIAN_BLOCKCOUNT'}' size='5' /></td>
 406                         </tr>
 407                         <tr>
 408                                 <td width='20%' class='base'>$Lang::tr{'guardian blocktime'}:</td>
 409                                 <td><input type='text' name='GUARDIAN_BLOCKTIME' value='$settings{'GUARDIAN_BLOCKTIME'}' size='10' /></td>
 410                         </tr>
 411                         <tr>
 412                                 <td width='20%' class='base'>$Lang::tr{'guardian logfile'}:</td>
 413                                 <td><input type='text' name='GUARDIAN_LOGFILE' value='$settings{'GUARDIAN_LOGFILE'}' size='30' /></td>
 414                         </tr>
 415                         <tr>
 416                                 <td width='20%' class='base'>$Lang::tr{'guardian snort alertfile'}:</td>
 417                                 <td><input type='text' name='GUARDIAN_SNORT_ALERTFILE' value='$settings{'GUARDIAN_SNORT_ALERTFILE'}' size='30' /></td>
 418                         </tr>
 419                 </table>
 420 END
 421
 422         print <<END;
 423                 <hr>
 424
 425                 <table width='95%'>
 426                         <tr>
 427                                 <td>&nbsp;</td>
 428                                 <td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 429                                 <td>&nbsp;</td>
 430                         </tr>
 431                 </table>
 432         </form>
 433 END
 434
 435         &Header::closebox();
 436 }
 437
 438 # Function to show elements of the guardian ignorefile and allow to add or remove single members of it.
 439 sub showIgnoreBox() {
 440         &Header::openbox('100%', 'center', $Lang::tr{'guardian ignored hosts'});
 441
 442         print <<END;
 443                 <table width='60%'>
 444                         <tr>
 445                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian ignored hosts'}</b></td>
 446                         </tr>
 447 END
 448                         # Check if the guardian ignore file contains any content.
 449                         if (-s $ignorefile) {
 450
 451                                 # Open file and print contents.
 452                                 open FILE, $ignorefile or die "Could not open $ignorefile";
 453
 454                                 my $id = 0;
 455                                 my $col = "";
 456
 457                                 # Read file line by line and print out the elements.
 458                                 while( my $ignored_element = <FILE> )  {
 459
 460                                         # Increase id number for each element in the ignore file.
 461                                         $id++;
 462
 463                                         # Check if the id number is even or not.
 464                                         if ($id % 2) {
 465                                                 $col="bgcolor='$color{'color22'}'";
 466                                         } else {
 467                                                 $col="bgcolor='$color{'color20'}'";
 468                                         }
 469
 470                                         print <<END;
 471                                         <tr>
 472                                                 <td width='80%' class='base' $col>$ignored_element</td>
 473                                                 <td width='20%' align='center' $col>
 474                                                         <form method='post' name='$id' action='$ENV{'SCRIPT_NAME'}'>
 475                                                                 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}'>
 476                                                                 <input type='hidden' name='ID' value='$id'>
 477                                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}'>
 478                                                         </form>
 479                                                 </td>
 480                                         </tr>
 481 END
 482                                 }
 483                         close (FILE);
 484                         } else {
 485                                 # Print notice that currently no elements are stored in the ignore file.
 486                                 print "<tr>\n";
 487                                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 488                                 print "</tr>\n";
 489                         }
 490
 491                 print "</table>\n";
 492
 493         # Section to add new elements to the ignore list.
 494         print <<END;
 495         <br>
 496         <div align='center'>
 497                 <table width='60%'>
 498                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 499                         <tr>
 500                                 <td width='30%'>$Lang::tr{'dnsforward add a new entry'}: </td>
 501                                 <td width='50%'><input type='text' name='NEW_IGNORE_ENTRY' value='' size='24' /></td>
 502                                 <td align='center' width='20%'><input type='submit' name='ACTION' value='$Lang::tr{'add'}' /></td>
 503                         </tr>
 504                         </form>
 505                 </table>
 506         </div>
 507 END
 508
 509         &Header::closebox();
 510 }
 511
 512 # Function to list currently bocked addresses from guardian and unblock them or add custom entries to block.
 513 sub showBlockedBox() {
 514         &Header::openbox('100%', 'center', $Lang::tr{'guardian blocked hosts'});
 515
 516         print <<END;
 517         <table width='60%'>
 518                 <tr>
 519                         <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian blocked hosts'}</b></td>
 520                 </tr>
 521 END
 522
 523                 # Lauch function to get the currently blocked hosts.
 524                 my @blocked_hosts = &GetBlockedHosts();
 525
 526                 my $id = 0;
 527                 my $col = "";
 528
 529                 # Loop through our blocked hosts array.
 530                 foreach my $blocked_host (@blocked_hosts) {
 531
 532                         # Increase id number for each element in the ignore file.
 533                         $id++;
 534
 535                         # Check if the id number is even or not.
 536                         if ($id % 2) {
 537                                 $col="bgcolor='$color{'color22'}'";
 538                         } else {
 539                                 $col="bgcolor='$color{'color20'}'";
 540                         }
 541
 542                         print <<END;
 543                         <tr>
 544                                 <td width='80%' class='base' $col><a href='/cgi-bin/ipinfo.cgi?ip=$blocked_host'>$blocked_host</a></td>
 545                                 <td width='20%' align='center' $col>
 546                                         <form method='post' name='frmb$id' action='$ENV{'SCRIPT_NAME'}'>
 547                                                 <input type='image' name='$Lang::tr{'unblock'}' src='/images/delete.gif' title='$Lang::tr{'unblock'}' alt='$Lang::tr{'unblock'}'>
 548                                                 <input type='hidden' name='ADDRESS_UNBLOCK' value='$blocked_host'>
 549                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'unblock'}'>
 550                                         </form>
 551                                 </td>
 552                         </tr>
 553 END
 554                 }
 555
 556         # If the loop only has been runs once the id still is "0", which means there are no
 557         # additional entries (blocked hosts) in the iptables chain.
 558         if ($id == 0) {
 559
 560                 # Print notice that currently no hosts are blocked.
 561                 print "<tr>\n";
 562                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 563                 print "</tr>\n";
 564         }
 565
 566         print "</table>\n";
 567
 568         # Section for a manual block of an IP-address.
 569         print <<END;
 570         <br>
 571         <div align='center'>
 572                 <table width='60%' border='0'>
 573                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 574                         <tr>
 575                                 <td width='30%'>$Lang::tr{'guardian block a host'}: </td>
 576                                 <td width='40%'><input type='text' name='ADDRESS_BLOCK' value='' size='24' /></td>
 577                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'block'}'></td>
 578                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'unblock all'}'></td>
 579                         </tr>
 580                         </form>
 581                 </table>
 582         </div>
 583 END
 584
 585         &Header::closebox();
 586 }
 587
 588 &Header::closebigbox();
 589 &Header::closepage();
 590
 591 # Function to check if guardian has been started.
 592 # Grab process id and consumed memory if the daemon is running.
 593 sub daemonstats() {
 594         $memory = 0;
 595         # for pid and memory
 596         open(FILE, '/usr/local/bin/addonctrl guardian status | ');
 597         @guardian = <FILE>;
 598         close(FILE);
 599         $string = join("", @guardian);
 600         $string =~ s/[a-z_]//gi;
 601         $string =~ s/\[[0-1]\;[0-9]+//gi;
 602         $string =~ s/[\(\)\.]//gi;
 603         $string =~ s/  //gi;
 604         $string =~ s/\e//gi;
 605         @pid = split(/\s/,$string);
 606         if (open(FILE, "/proc/$pid[0]/statm")){
 607                 my $temp = <FILE>;
 608                 @memory = split(/ /,$temp);
 609                 close(FILE);
 610         }
 611         $memory+=$memory[0];
 612 }
 613
 614 sub GetBlockedHosts() {
 615
 616         # Create new, empty array.
 617         my @hosts;
 618
 619         # Lauch helper to get chains from iptables.
 620         open(FILE, "/usr/local/bin/guardianctrl get-chain |");
 621
 622         # Read file line by line and print out the elements.
 623         foreach my $line (<FILE>) {
 624
 625                 # Skip descriptive lines.
 626                 next if ($line =~ /^Chain/);
 627                 next if ($line =~ /^ pkts/);
 628
 629                 # Generate array, based on the line content (seperator is a single or multiple space's)
 630                 my @comps = split(/\s{1,}/, $line);
 631                 my ($lead, $pkts, $bytes, $target, $prot, $opt, $in, $out, $source, $destination) = @comps;
 632
 633                 # Assign different variable names.
 634                 my $blocked_host = $source;
 635
 636                 # Add host to our hosts array.
 637                 push(@hosts, $blocked_host);
 638         }
 639
 640         # Convert entries, sort them, write back and store the sorted entries into new array.
 641         my @sorted = map  { $_->[0] }
 642              sort { $a->[1] <=> $b->[1] }
 643              map  { [$_, int sprintf("%03.f%03.f%03.f%03.f", split(/\./, $_))] }
 644              @hosts;
 645
 646         # Return our sorted list.
 647         return @sorted
 648 }
 649
 650 sub BuildConfiguration() {
 651         my %settings = ();
 652         &General::readhash("${General::swroot}/guardian/settings", \%settings);
 653
 654         my $configfile = "${General::swroot}/guardian/guardian.conf";
 655
 656         # We set this to 1 (enabled) to prevent guardian from blocking the ISP gateway.
 657         my $HostGatewayByte = "1";
 658
 659         # Open configfile for writing.
 660         open(FILE, ">$configfile");
 661
 662         print FILE "EnableSnortMonitoring\t\t$settings{'GUARDIAN_ENABLE_SNORT'}\n";
 663         print FILE "EnableSSHMonitoring\t\t$settings{'GUARDIAN_ENABLE_SSH'}\n";
 664         print FILE "EnableHTTPDMonitoring\t\t$settings{'GUARDIAN_ENABLE_HTTPD'}\n";
 665         print FILE "LogLevel\t\t\t$settings{'GUARDIAN_LOGLEVEL'}\n";
 666         print FILE "BlockCount\t\t\t$settings{'GUARDIAN_BLOCKCOUNT'}\n";
 667         print FILE "HostGatewayByte\t\t\t$HostGatewayByte\n";
 668         print FILE "LogFile\t\t\t\t$settings{'GUARDIAN_LOGFILE'}\n";
 669         print FILE "AlertFile\t\t\t$settings{'GUARDIAN_SNORT_ALERTFILE'}\n";
 670         print FILE "IgnoreFile\t\t\t$ignorefile\n";
 671         print FILE "TimeLimit\t\t\t$settings{'GUARDIAN_BLOCKTIME'}\n";
 672         print FILE "PriorityLevel\t\t\t$settings{'GUARDIAN_PRIORITY_LEVEL'}\n";
 673
 674         close(FILE);
 675
 676         # Check if guardian should be started or stopped.
 677         if($settings{'GUARDIAN_ENABLED'} eq 'on') {
 678                 if($pid > 0) {
 679                         # Call guardianctl to perform a reload.
 680                         system("/usr/local/bin/guardianctrl reload &>/dev/null");
 681                 } else {
 682                         # Launch guardian.
 683                         system("/usr/local/bin/guardianctrl start &>/dev/null");
 684                 }
 685         } else {
 686                 # Stop the daemon.
 687                 system("/usr/local/bin/guardianctrl stop &>/dev/null");
 688         }
 689 }