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