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 $ignorefile ='/var/ipfire/guardian/guardian.ignore';
  49
  50 # Hash which contains the supported modules and the
  51 # file locations on IPFire systems.
  52 my %module_file_locations = (
  53         "HTTPD" => "/var/log/httpd/error_log",
  54         "OWNCLOUD" => "/var/owncloud/data/owncloud.log",
  55         "SNORT" => "/var/log/snort.alert",
  56         "SSH" => "/var/log/messages",
  57 );
  58
  59 our %netsettings = ();
  60 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  61
  62 our %color = ();
  63 our %mainsettings = ();
  64 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  65 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  66
  67 # Pakfire meta file for owncloud.
  68 # (File exists when the addon is installed.)
  69 my $owncloud_meta = "/opt/pakfire/db/installed/meta-owncloud";
  70
  71 our %settings = ();
  72
  73 $settings{'ACTION'} = '';
  74
  75 $settings{'GUARDIAN_ENABLED'} = 'off';
  76 $settings{'GUARDIAN_MONITOR_SNORT'} = 'on';
  77 $settings{'GUARDIAN_MONITOR_SSH'} = 'on';
  78 $settings{'GUARDIAN_MONITOR_HTTPD'} = 'on';
  79 $settings{'GUARDIAN_MONITOR_OWNCLOUD'} = '';
  80 $settings{'GUARDIAN_LOG_FACILITY'} = 'syslog';
  81 $settings{'GUARDIAN_LOGLEVEL'} = 'info';
  82 $settings{'GUARDIAN_BLOCKCOUNT'} = '3';
  83 $settings{'GUARDIAN_BLOCKTIME'} = '86400';
  84 $settings{'GUARDIAN_LOGFILE'} = '/var/log/guardian/guardian.log';
  85 $settings{'GUARDIAN_SNORT_PRIORITY_LEVEL'} = '3';
  86
  87 # Default settings for owncloud if installed.
  88 if ( -e "$owncloud_meta") {
  89         $settings{'GUARDIAN_MONITOR_OWNCLOUD'} = 'off';
  90 }
  91
  92 my $errormessage = '';
  93
  94 &Header::showhttpheaders();
  95
  96 # Get GUI values.
  97 &Header::getcgihash(\%settings);
  98
  99 # Check if guardian is running and grab some stats.
 100 &daemonstats();
 101 my $pid = $pid[0];
 102
 103 ## Perform input checks and save settings.
 104 #
 105 if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
 106         # Check for valid blocktime.
 107         unless(($settings{'GUARDIAN_BLOCKTIME'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKTIME'} ne "0")) {
 108                         $errormessage = "$Lang::tr{'guardian invalid blocktime'}";
 109         }
 110
 111         # Check if the bloccount is valid.
 112         unless(($settings{'GUARDIAN_BLOCKCOUNT'} =~ /^\d+$/) && ($settings{'GUARDIAN_BLOCKCOUNT'} ne "0")) {
 113                         $errormessage = "$Lang::tr{'guardian invalid blockcount'}";
 114         }
 115
 116         # Check Logfile.
 117         unless($settings{'GUARDIAN_LOGFILE'} =~ /^[a-zA-Z0-9\.\/]+$/) {
 118                 $errormessage = "$Lang::tr{'guardian invalid logfile'}";
 119         }
 120
 121         # Only continue if no error message has been set.
 122         if($errormessage eq '') {
 123                 # Write configuration settings to file.
 124                 &General::writehash("${General::swroot}/guardian/settings", \%settings);
 125
 126                 # Update configuration files.
 127                 &BuildConfiguration();
 128         }
 129
 130 ## Add a new entry to the ignore file.
 131 #
 132 } elsif ($settings{'ACTION'} eq $Lang::tr{'add'}) {
 133
 134         # Check if any input has been performed.
 135         if ($settings{'NEW_IGNORE_ENTRY'} ne '') {
 136
 137                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 138                 if ((!&General::validip($settings{'NEW_IGNORE_ENTRY'})) && (!&General::validipandmask($settings{'NEW_IGNORE_ENTRY'}))) {
 139                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 140                 }
 141         } else {
 142                 $errormessage = "$Lang::tr{'guardian empty input'}";
 143         }
 144
 145         # Go further if there was no error.
 146         if ($errormessage eq '') {
 147                 my $new_entry = $settings{'NEW_IGNORE_ENTRY'};
 148
 149                 # Open file for appending the new entry.
 150                 open (FILE, ">>$ignorefile") or die "Unable to open $ignorefile for writing";
 151
 152                 # Write the new entry to the ignore file.
 153                 print FILE "$new_entry\n";
 154                 close(FILE);
 155         }
 156
 157         # Check if guardian is running.
 158         if ($pid > 0) {
 159                 # Call guardianctrl to perform a reload.
 160                 system("/usr/local/bin/guardianctrl reload &>/dev/null");
 161         }
 162
 163 ## Remove entry from ignore list.
 164 #
 165 } elsif ($settings{'ACTION'} eq $Lang::tr{'remove'}) {
 166         my $id = 0;
 167
 168         # Open ignorefile and read content.
 169         open(FILE, "<$ignorefile") or die "Unable to open $ignorefile.";
 170         my @current = <FILE>;
 171         close(FILE);
 172
 173         # Re-open ignorefile for writing.
 174         open(FILE, ">$ignorefile") or die "Unable to open $ignorefile for writing";
 175         flock FILE, 2;
 176
 177         # Read line by line from ignorefile and write them back except the line with the given ID.
 178         # So this line is missing in the new file and the entry has been deleted.
 179         foreach my $line (@current) {
 180                 $id++;
 181                 unless ($settings{'ID'} eq $id) {
 182                         print FILE "$line";
 183                 }
 184         }
 185         close(FILE);
 186
 187         # Check if guardian is running.
 188         if ($pid > 0) {
 189                 # Call guardianctrl to perform a reload.
 190                 system("/usr/local/bin/guardianctrl reload &>/dev/null");
 191         }
 192
 193 ## Block a user given address or subnet.
 194 #
 195 } elsif ($settings{'ACTION'} eq $Lang::tr{'block'}) {
 196
 197         # Assign some temporary variables used for input validation.
 198         my $input = $settings{'ADDRESS_BLOCK'};
 199         my $green = $netsettings{'GREEN_ADDRESS'};
 200         my $blue = $netsettings{'BLUE_ADDRESS'};
 201         my $orange = $netsettings{'ORANGE_ADDRESS'};
 202         my $red = $netsettings{'RED_ADDRESS'};
 203
 204         # Get gateway address.
 205         my $gateway = &General::get_gateway();
 206
 207         # Check if any input has been performed.
 208         if ($input eq '') {
 209                 $errormessage = "$Lang::tr{'guardian empty input'}";
 210         }
 211
 212         # Check if the given input is localhost (127.0.0.1).
 213         elsif ($input eq "127.0.0.1") {
 214                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 215         }
 216
 217         # Check if the given input is anywhere (0.0.0.0).
 218         elsif ($input eq "0.0.0.0") {
 219                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 220         }
 221
 222         # Check if the given input is one of the interface addresses or our gateway.
 223         elsif ($input eq "$green" || $input eq "$blue" || $input eq "$orange" || $input eq "$red" || $input eq "$gateway") {
 224                 $errormessage = "$Lang::tr{'guardian blocking of this address is not allowed'}";
 225         }
 226
 227         # Check if the given input is a valid IP address.
 228         elsif (!&General::validip($input)) {
 229                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 230         }
 231
 232         # Go further if there was no error.
 233         if ($errormessage eq '') {
 234                 my $block = $settings{'ADDRESS_BLOCK'};
 235
 236                 # Call helper to unblock address.
 237                 system("/usr/local/bin/guardianctrl block $block &>/dev/null");
 238         }
 239
 240 ## Unblock address or subnet.
 241 #
 242 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock'}) {
 243
 244         # Check if no empty input has been performed.
 245         if ($settings{'ADDRESS_UNBLOCK'} ne '') {
 246
 247                 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
 248                 if ((!&General::validip($settings{'ADDRESS_UNBLOCK'})) && (!&General::validipandmask($settings{'ADDRESS_UNBLOCK'}))) {
 249                         $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
 250                 }
 251
 252         } else {
 253                 $errormessage = "$Lang::tr{'guardian empty input'}";
 254         }
 255
 256         # Go further if there was no error.
 257         if ($errormessage eq '') {
 258                 my $unblock = $settings{'ADDRESS_UNBLOCK'};
 259
 260                 # Call helper to unblock address.
 261                 system("/usr/local/bin/guardianctrl unblock $unblock &>/dev/null");
 262         }
 263
 264 ## Unblock all.
 265 #
 266 } elsif ($settings{'ACTION'} eq $Lang::tr{'unblock all'}) {
 267
 268         # Call helper to flush iptables chain from guardian.
 269         system("/usr/local/bin/guardianctrl flush-chain &>/dev/null");
 270 }
 271
 272 # Load settings from file.
 273 &General::readhash("${General::swroot}/guardian/settings", \%settings);
 274
 275 # Call functions to generate whole page.
 276 &showMainBox();
 277 &showIgnoreBox();
 278
 279 # Display area only if guardian is running.
 280 if ( ($memory != 0) && ($pid > 0) ) {
 281         &showBlockedBox();
 282 }
 283
 284 # Function to display the status of guardian and allow base configuration.
 285 sub showMainBox() {
 286         my %checked = ();
 287         my %selected = ();
 288
 289         $checked{'GUARDIAN_ENABLED'}{'on'} = '';
 290         $checked{'GUARDIAN_ENABLED'}{'off'} = '';
 291         $checked{'GUARDIAN_ENABLED'}{$settings{'GUARDIAN_ENABLED'}} = 'checked';
 292         $checked{'GUARDIAN_MONITOR_SNORT'}{'off'} = '';
 293         $checked{'GUARDIAN_MONITOR_SNORT'}{'on'} = '';
 294         $checked{'GUARDIAN_MONITOR_SNORT'}{$settings{'GUARDIAN_MONITOR_SNORT'}} = "checked='checked'";
 295         $checked{'GUARDIAN_MONITOR_SSH'}{'off'} = '';
 296         $checked{'GUARDIAN_MONITOR_SSH'}{'on'} = '';
 297         $checked{'GUARDIAN_MONITOR_SSH'}{$settings{'GUARDIAN_MONITOR_SSH'}} = "checked='checked'";
 298         $checked{'GUARDIAN_MONITOR_HTTPD'}{'off'} = '';
 299         $checked{'GUARDIAN_MONITOR_HTTPD'}{'on'} = '';
 300         $checked{'GUARDIAN_MONITOR_HTTPD'}{$settings{'GUARDIAN_MONITOR_HTTPD'}} = "checked='checked'";
 301         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'off'} = '';
 302         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'on'} = '';
 303         $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{$settings{'GUARDIAN_MONITOR_OWNCLOUD'}} = "checked='checked'";
 304
 305         $selected{'GUARDIAN_LOG_FACILITY'}{$settings{'GUARDIAN_LOG_FACILITY'}} = 'selected';
 306         $selected{'GUARDIAN_LOGLEVEL'}{$settings{'GUARDIAN_LOGLEVEL'}} = 'selected';
 307         $selected{'GUARDIAN_SNORT_PRIORITY_LEVEL'}{$settings{'GUARDIAN_SNORT_PRIORITY_LEVEL'}} = 'selected';
 308
 309         &Header::openpage($Lang::tr{'guardian configuration'}, 1, '');
 310         &Header::openbigbox('100%', 'left', '', $errormessage);
 311
 312         # Print errormessage if there is one.
 313         if ($errormessage) {
 314                 &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 315                 print "<font class='base'>$errormessage&nbsp;</font>\n";
 316                 &Header::closebox();
 317         }
 318
 319
 320         # Draw current guardian state.
 321         &Header::openbox('100%', 'center', $Lang::tr{'guardian'});
 322
 323         # Get current status of guardian.
 324         &daemonstats();
 325         $pid = $pid[0];
 326
 327         # Display some useful information related to guardian, if daemon is running.
 328         if ( ($memory != 0) && ($pid > 0) ){
 329                 print <<END;
 330                         <table width='95%' cellspacing='0' class='tbl'>
 331                                 <tr>
 332                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 333                                 </tr>
 334                                 <tr>
 335                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 336                                         <td align='center' colspan='2' width='75%' bgcolor='${Header::colourgreen}'><font color='white'><strong>$Lang::tr{'running'}</strong></font></td>
 337                                 </tr>
 338                                 <tr>
 339                                         <td class='base'></td>
 340                                         <td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
 341                                         <td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
 342                                 </tr>
 343                                 <tr>
 344                                         <td class='base'></td>
 345                                         <td bgcolor='$color{'color22'}' align='center'>$pid</td>
 346                                         <td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
 347                                 </tr>
 348                         </table>
 349 END
 350         } else {
 351                 # Otherwise display a hint that the service is not launched.
 352                 print <<END;
 353                         <table width='95%' cellspacing='0' class='tbl'>
 354                                 <tr>
 355                                         <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
 356                                 </tr>
 357                                 <tr>
 358                                         <td class='base'>$Lang::tr{'guardian daemon'}</td>
 359                                         <td align='center' width='75%' bgcolor='${Header::colourred}'><font color='white'><strong>$Lang::tr{'stopped'}</strong></font></td>
 360                                 </tr>
 361                         </table>
 362 END
 363         }
 364
 365         &Header::closebox();
 366
 367         # Draw elements for guardian configuration.
 368         &Header::openbox('100%', 'center', $Lang::tr{'guardian configuration'});
 369
 370         print <<END;
 371                 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 372
 373                 <table width='95%'>
 374                         <tr>
 375                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian common settings'}</b></td>
 376                         </tr>
 377                         <tr>
 378                                 <td width='20%' class='base'>$Lang::tr{'guardian enabled'}:</td>
 379                                 <td><input type='checkbox' name='GUARDIAN_ENABLED' $checked{'GUARDIAN_ENABLED'}{'on'} /></td>
 380                         </tr>
 381                         <tr>
 382                                 <td colspan='2'><br></td>
 383                         </tr>
 384                         <tr>
 385                                 <td width='20%' class='base'>$Lang::tr{'guardian watch snort alertfile'}</td>
 386                                 <td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_SNORT' value='on' $checked{'GUARDIAN_MONITOR_SNORT'}{'on'} /> /
 387                                 <input type='radio' name='GUARDIAN_MONITOR_SNORT' value='off' $checked{'GUARDIAN_MONITOR_SNORT'}{'off'} /> off</td>
 388                         </tr>
 389                         <tr>
 390                                 <td width='20%' class='base'>$Lang::tr{'guardian block ssh brute-force'}</td>
 391                                 <td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_SSH' value='on' $checked{'GUARDIAN_MONITOR_SSH'}{'on'} /> /
 392                                 <input type='radio' name='GUARDIAN_MONITOR_SSH' value='off' $checked{'GUARDIAN_MONITOR_SSH'}{'off'} /> off</td>
 393                         </tr>
 394                         <tr>
 395                                 <td width='20%' class='base'>$Lang::tr{'guardian block httpd brute-force'}</td>
 396                                 <td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_HTTPD' value='on' $checked{'GUARDIAN_MONITOR_HTTPD'}{'on'} /> /
 397                                 <input type='radio' name='GUARDIAN_MONITOR_HTTPD' value='off' $checked{'GUARDIAN_MONITOR_HTTPD'}{'off'} /> off</td>
 398                         </tr>
 399 END
 400                         # Display owncloud checkbox when the addon is installed.
 401                         if ( -e "$owncloud_meta" ) {
 402                                 print"<tr>\n";
 403                                 print"<td width='20%' class='base'>$Lang::tr{'guardian block owncloud brute-force'}</td>\n";
 404                                 print"<td align='left'>on <input type='radio' name='GUARDIAN_MONITOR_OWNCLOUD' value='on' $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'on'} /> /\n";
 405                                 print"<input type='radio' name='GUARDIAN_MONITOR_OWNCLOUD' value='off' $checked{'GUARDIAN_MONITOR_OWNCLOUD'}{'off'} /> off</td>\n";
 406                                 print"</tr>\n";
 407                         }
 408         print <<END;
 409                         <tr>
 410                                 <td colspan='2'><br></td>
 411                         </tr>
 412                         <tr>
 413                                 <td align='left' width='20%'>$Lang::tr{'guardian logfacility'}:</td>
 414                                 <td><select name='GUARDIAN_LOG_FACILITY'>
 415                                         <option value='syslog' $selected{'GUARDIAN_LOG_FACILITY'}{'syslog'}>syslog</option>
 416                                         <option value='file' $selected{'GUARDIAN_LOG_FACILITY'}{'file'}>file</option>
 417                                         <option value='console' $selected{'GUARDIAN_LOG_FACILITY'}{'console'}>console</option>
 418                                 </select></td>
 419                         </tr>
 420                         <tr>
 421                                 <td colspan='2'><br></td>
 422                         </tr>
 423                         <tr>
 424                                 <td align='left' width='20%'>$Lang::tr{'guardian loglevel'}:</td>
 425                                 <td><select name='GUARDIAN_LOGLEVEL'>
 426                                         <option value='off' $selected{'GUARDIAN_LOGLEVEL'}{'off'}>off</option>
 427                                         <option value='info' $selected{'GUARDIAN_LOGLEVEL'}{'info'}>info</option>
 428                                         <option value='debug' $selected{'GUARDIAN_LOGLEVEL'}{'debug'}>debug</option>
 429                                 </select></td>
 430                         </tr>
 431                         <tr>
 432                                 <td colspan='2'><br></td>
 433                         </tr>
 434                         <tr>
 435                                 <td align='left' width='20%'>$Lang::tr{'guardian priority level'}:</td>
 436                                 <td><select name='GUARDIAN_SNORT_PRIORITY_LEVEL'>
 437                                         <option value='1' $selected{'GUARDIAN_SNORT_PRIORITY_LEVEL'}{'1'}>1</option>
 438                                         <option value='2' $selected{'GUARDIAN_SNORT_PRIORITY_LEVEL'}{'2'}>2</option>
 439                                         <option value='3' $selected{'GUARDIAN_SNORT_PRIORITY_LEVEL'}{'3'}>3</option>
 440                                         <option value='4' $selected{'GUARDIAN_SNORT_PRIORITY_LEVEL'}{'4'}>4</option>
 441                                 </select></td>
 442                         </tr>
 443                         <tr>
 444                                 <td colspan='2'><br></td>
 445                         </tr>
 446                         <tr>
 447                                 <td width='20%' class='base'>$Lang::tr{'guardian blockcount'}:</td>
 448                                 <td><input type='text' name='GUARDIAN_BLOCKCOUNT' value='$settings{'GUARDIAN_BLOCKCOUNT'}' size='5' /></td>
 449                         </tr>
 450                         <tr>
 451                                 <td width='20%' class='base'>$Lang::tr{'guardian blocktime'}:</td>
 452                                 <td><input type='text' name='GUARDIAN_BLOCKTIME' value='$settings{'GUARDIAN_BLOCKTIME'}' size='10' /></td>
 453                         </tr>
 454                         <tr>
 455                                 <td width='20%' class='base'>$Lang::tr{'guardian logfile'}:</td>
 456                                 <td><input type='text' name='GUARDIAN_LOGFILE' value='$settings{'GUARDIAN_LOGFILE'}' size='30' /></td>
 457                         </tr>
 458                 </table>
 459 END
 460
 461         print <<END;
 462                 <hr>
 463
 464                 <table width='95%'>
 465                         <tr>
 466                                 <td>&nbsp;</td>
 467                                 <td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 468                                 <td>&nbsp;</td>
 469                         </tr>
 470                 </table>
 471         </form>
 472 END
 473
 474         &Header::closebox();
 475 }
 476
 477 # Function to show elements of the guardian ignorefile and allow to add or remove single members of it.
 478 sub showIgnoreBox() {
 479         &Header::openbox('100%', 'center', $Lang::tr{'guardian ignored hosts'});
 480
 481         print <<END;
 482                 <table width='60%'>
 483                         <tr>
 484                                 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian ignored hosts'}</b></td>
 485                         </tr>
 486 END
 487                         # Check if the guardian ignore file contains any content.
 488                         if (-s $ignorefile) {
 489
 490                                 # Open file and print contents.
 491                                 open FILE, $ignorefile or die "Could not open $ignorefile";
 492
 493                                 my $id = 0;
 494                                 my $col = "";
 495
 496                                 # Read file line by line and print out the elements.
 497                                 while( my $ignored_element = <FILE> )  {
 498
 499                                         # Increase id number for each element in the ignore file.
 500                                         $id++;
 501
 502                                         # Check if the id number is even or not.
 503                                         if ($id % 2) {
 504                                                 $col="bgcolor='$color{'color22'}'";
 505                                         } else {
 506                                                 $col="bgcolor='$color{'color20'}'";
 507                                         }
 508
 509                                         print <<END;
 510                                         <tr>
 511                                                 <td width='80%' class='base' $col>$ignored_element</td>
 512                                                 <td width='20%' align='center' $col>
 513                                                         <form method='post' name='$id' action='$ENV{'SCRIPT_NAME'}'>
 514                                                                 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}'>
 515                                                                 <input type='hidden' name='ID' value='$id'>
 516                                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'remove'}'>
 517                                                         </form>
 518                                                 </td>
 519                                         </tr>
 520 END
 521                                 }
 522                         close (FILE);
 523                         } else {
 524                                 # Print notice that currently no elements are stored in the ignore file.
 525                                 print "<tr>\n";
 526                                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 527                                 print "</tr>\n";
 528                         }
 529
 530                 print "</table>\n";
 531
 532         # Section to add new elements to the ignore list.
 533         print <<END;
 534         <br>
 535         <div align='center'>
 536                 <table width='60%'>
 537                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 538                         <tr>
 539                                 <td width='30%'>$Lang::tr{'dnsforward add a new entry'}: </td>
 540                                 <td width='50%'><input type='text' name='NEW_IGNORE_ENTRY' value='' size='24' /></td>
 541                                 <td align='center' width='20%'><input type='submit' name='ACTION' value='$Lang::tr{'add'}' /></td>
 542                         </tr>
 543                         </form>
 544                 </table>
 545         </div>
 546 END
 547
 548         &Header::closebox();
 549 }
 550
 551 # Function to list currently bocked addresses from guardian and unblock them or add custom entries to block.
 552 sub showBlockedBox() {
 553         &Header::openbox('100%', 'center', $Lang::tr{'guardian blocked hosts'});
 554
 555         print <<END;
 556         <table width='60%'>
 557                 <tr>
 558                         <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian blocked hosts'}</b></td>
 559                 </tr>
 560 END
 561
 562                 # Lauch function to get the currently blocked hosts.
 563                 my @blocked_hosts = &GetBlockedHosts();
 564
 565                 my $id = 0;
 566                 my $col = "";
 567
 568                 # Loop through our blocked hosts array.
 569                 foreach my $blocked_host (@blocked_hosts) {
 570
 571                         # Increase id number for each element in the ignore file.
 572                         $id++;
 573
 574                         # Check if the id number is even or not.
 575                         if ($id % 2) {
 576                                 $col="bgcolor='$color{'color22'}'";
 577                         } else {
 578                                 $col="bgcolor='$color{'color20'}'";
 579                         }
 580
 581                         print <<END;
 582                         <tr>
 583                                 <td width='80%' class='base' $col><a href='/cgi-bin/ipinfo.cgi?ip=$blocked_host'>$blocked_host</a></td>
 584                                 <td width='20%' align='center' $col>
 585                                         <form method='post' name='frmb$id' action='$ENV{'SCRIPT_NAME'}'>
 586                                                 <input type='image' name='$Lang::tr{'unblock'}' src='/images/delete.gif' title='$Lang::tr{'unblock'}' alt='$Lang::tr{'unblock'}'>
 587                                                 <input type='hidden' name='ADDRESS_UNBLOCK' value='$blocked_host'>
 588                                                 <input type='hidden' name='ACTION' value='$Lang::tr{'unblock'}'>
 589                                         </form>
 590                                 </td>
 591                         </tr>
 592 END
 593                 }
 594
 595         # If the loop only has been runs once the id still is "0", which means there are no
 596         # additional entries (blocked hosts) in the iptables chain.
 597         if ($id == 0) {
 598
 599                 # Print notice that currently no hosts are blocked.
 600                 print "<tr>\n";
 601                 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
 602                 print "</tr>\n";
 603         }
 604
 605         print "</table>\n";
 606
 607         # Section for a manual block of an IP-address.
 608         print <<END;
 609         <br>
 610         <div align='center'>
 611                 <table width='60%' border='0'>
 612                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 613                         <tr>
 614                                 <td width='30%'>$Lang::tr{'guardian block a host'}: </td>
 615                                 <td width='40%'><input type='text' name='ADDRESS_BLOCK' value='' size='24' /></td>
 616                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'block'}'></td>
 617                                 <td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'unblock all'}'></td>
 618                         </tr>
 619                         </form>
 620                 </table>
 621         </div>
 622 END
 623
 624         &Header::closebox();
 625 }
 626
 627 &Header::closebigbox();
 628 &Header::closepage();
 629
 630 # Function to check if guardian has been started.
 631 # Grab process id and consumed memory if the daemon is running.
 632 sub daemonstats() {
 633         $memory = 0;
 634         # for pid and memory
 635         open(FILE, '/usr/local/bin/addonctrl guardian status | ');
 636         @guardian = <FILE>;
 637         close(FILE);
 638         $string = join("", @guardian);
 639         $string =~ s/[a-z_]//gi;
 640         $string =~ s/\[[0-1]\;[0-9]+//gi;
 641         $string =~ s/[\(\)\.]//gi;
 642         $string =~ s/  //gi;
 643         $string =~ s/\e//gi;
 644         @pid = split(/\s/,$string);
 645         if (open(FILE, "/proc/$pid[0]/statm")){
 646                 my $temp = <FILE>;
 647                 @memory = split(/ /,$temp);
 648                 close(FILE);
 649         }
 650         $memory+=$memory[0];
 651 }
 652
 653 sub GetBlockedHosts() {
 654
 655         # Create new, empty array.
 656         my @hosts;
 657
 658         # Lauch helper to get chains from iptables.
 659         open(FILE, "/usr/local/bin/guardianctrl get-chain |");
 660
 661         # Read file line by line and print out the elements.
 662         foreach my $line (<FILE>) {
 663
 664                 # Skip descriptive lines.
 665                 next if ($line =~ /^Chain/);
 666                 next if ($line =~ /^ pkts/);
 667
 668                 # Generate array, based on the line content (seperator is a single or multiple space's)
 669                 my @comps = split(/\s{1,}/, $line);
 670                 my ($lead, $pkts, $bytes, $target, $prot, $opt, $in, $out, $source, $destination) = @comps;
 671
 672                 # Assign different variable names.
 673                 my $blocked_host = $source;
 674
 675                 # Add host to our hosts array.
 676                 push(@hosts, $blocked_host);
 677         }
 678
 679         # Convert entries, sort them, write back and store the sorted entries into new array.
 680         my @sorted = map  { $_->[0] }
 681              sort { $a->[1] <=> $b->[1] }
 682              map  { [$_, int sprintf("%03.f%03.f%03.f%03.f", split(/\./, $_))] }
 683              @hosts;
 684
 685         # Return our sorted list.
 686         return @sorted
 687 }
 688
 689 sub BuildConfiguration() {
 690         my %settings = ();
 691         &General::readhash("${General::swroot}/guardian/settings", \%settings);
 692
 693         my $configfile = "${General::swroot}/guardian/guardian.conf";
 694
 695         # Open configfile for writing.
 696         open(FILE, ">$configfile");
 697
 698         # Config file header.
 699         print FILE "# Autogenerated configuration file.\n";
 700         print FILE "# All user modifications will be overwritten.\n\n";
 701
 702         # Settings for the logging mechanism.
 703         print FILE "# Log settings.\n";
 704         print FILE "LogFacility = $settings{'GUARDIAN_LOG_FACILITY'}\n";
 705
 706         if ($settings{'GUARDIAN_LOG_FACILITY'} eq "file") {
 707                 print FILE "LogFile = $settings{'GUARDIAN_LOGFILE'}\n";
 708         }
 709
 710         print FILE "LogLevel = $settings{'GUARDIAN_LOGLEVEL'}\n\n";
 711
 712         # IPFire related static settings.
 713         print FILE "# IPFire related settings.\n";
 714         print FILE "FirewallEngine = IPtables\n";
 715         print FILE "SocketOwner = nobody:nobody\n";
 716         print FILE "IgnoreFile = $ignorefile\n\n";
 717
 718         # Configured block values.
 719         print FILE "# Configured block values.\n";
 720         print FILE "BlockCount = $settings{'GUARDIAN_BLOCKCOUNT'}\n";
 721         print FILE "BlockTime = $settings{'GUARDIAN_BLOCKTIME'}\n\n";
 722
 723         # Enabled modules.
 724         # Loop through whole settings hash.
 725         print FILE "# Enabled modules.\n";
 726         foreach my $option (keys %settings) {
 727                 # Search for enabled modules.
 728                 if ($option =~ /GUARDIAN_MONITOR_(.*)/) {
 729                         # Skip if module is not enabled.
 730                         next unless($settings{$option} eq "on");
 731
 732                         # Skip module if no file location is available.
 733                         next unless(exists($module_file_locations{$1}));
 734
 735                         # Add enabled module and defined path to the config file.
 736                         print FILE "Monitor_$1 = $module_file_locations{$1}\n";
 737                 }
 738         }
 739
 740         # Module settings.
 741         print FILE "\n# Module settings.\n";
 742         # Check if SNORT is enabled and add snort priority.
 743         if ($settings{'GUARDIAN_MONITOR_SNORT'} eq "on") {
 744                 print FILE "SnortPriorityLevel = $settings{'GUARDIAN_SNORT_PRIORITY_LEVEL'}\n";
 745         }
 746
 747         close(FILE);
 748
 749         # Check if guardian should be started or stopped.
 750         if($settings{'GUARDIAN_ENABLED'} eq 'on') {
 751                 if($pid > 0) {
 752                         # Call guardianctl to perform a reload.
 753                         system("/usr/local/bin/guardianctrl reload &>/dev/null");
 754                 } else {
 755                         # Launch guardian.
 756                         system("/usr/local/bin/guardianctrl start &>/dev/null");
 757                 }
 758         } else {
 759                 # Stop the daemon.
 760                 system("/usr/local/bin/guardianctrl stop &>/dev/null");
 761         }
 762 }