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