2 ###############################################################################
4 # IPFire.org - A linux based firewall #
5 # Copyright (C) 2007-2018 IPFire Team <info@ipfire.org> #
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. #
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. #
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/>. #
20 ###############################################################################
24 # enable only the following on debugging purpose
26 #use CGI::Carp 'fatalsToBrowser';
28 require '/var/ipfire/general-functions.pl';
29 require "${General::swroot}/lang.pl";
30 require "${General::swroot}/header.pl";
31 require "${General::swroot}/ids-functions.pl";
34 my %mainsettings = ();
38 my %rulesetsources = ();
44 # Read-in main settings, for language, theme and colors.
45 &General
::readhash
("${General::swroot}/main/settings", \
%mainsettings);
46 &General
::readhash
("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \
%color);
48 # Get the available network zones, based on the config type of the system and store
49 # the list of zones in an array.
50 my @network_zones = &IDS
::get_available_network_zones
();
54 # Create files if they does not exist yet.
55 &IDS
::check_and_create_filelayout
();
57 # Hash which contains the colour code of a network zone.
59 'red' => $Header::colourred
,
60 'green' => $Header::colourgreen
,
61 'blue' => $Header::colourblue
,
62 'orange' => $Header::colourorange
65 &Header
::showhttpheaders
();
68 &Header
::getcgihash
(\
%cgiparams);
70 ## Add/edit an entry to the ignore file.
72 if (($cgiparams{'WHITELIST'} eq $Lang::tr
{'add'}) || ($cgiparams{'WHITELIST'} eq $Lang::tr
{'update'})) {
74 # Check if any input has been performed.
75 if ($cgiparams{'IGNORE_ENTRY_ADDRESS'} ne '') {
77 # Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
78 if ((!&General
::validip
($cgiparams{'IGNORE_ENTRY_ADDRESS'})) && (!&General
::validipandmask
($cgiparams{'IGNORE_ENTRY_ADDRESS'}))) {
79 $errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
82 $errormessage = "$Lang::tr{'guardian empty input'}";
85 # Go further if there was no error.
86 if ($errormessage eq '') {
92 my $new_entry_address = $cgiparams{'IGNORE_ENTRY_ADDRESS'};
93 my $new_entry_remark = $cgiparams{'IGNORE_ENTRY_REMARK'};
95 # Read-in ignoredfile.
96 &General
::readhasharray
($IDS::ignored_file
, \
%ignored);
98 # Check if we should edit an existing entry and got an ID.
99 if (($cgiparams{'WHITELIST'} eq $Lang::tr
{'update'}) && ($cgiparams{'ID'})) {
100 # Assin the provided id.
101 $id = $cgiparams{'ID'};
103 # Undef the given ID.
104 undef($cgiparams{'ID'});
106 # Grab the configured status of the corresponding entry.
107 $status = $ignored{$id}[2];
109 # Each newly added entry automatically should be enabled.
112 # Generate the ID for the new entry.
114 # Sort the keys by their ID and store them in an array.
115 my @keys = sort { $a <=> $b } keys %ignored;
117 # Reverse the key array.
118 my @reversed = reverse(@keys);
120 # Obtain the last used id.
121 my $last_id = @reversed[0];
123 # Increase the last id by one and use it as id for the new entry.
127 # Add/Modify the entry to/in the ignored hash.
128 $ignored{$id} = ["$new_entry_address", "$new_entry_remark", "$status"];
130 # Write the changed ignored hash to the ignored file.
131 &General
::writehasharray
($IDS::ignored_file
, \
%ignored);
133 # Regenerate the ignore file.
134 &IDS
::generate_ignore_file
();
137 # Check if the IDS is running.
138 if(&IDS
::ids_is_running
()) {
139 # Call suricatactrl to perform a reload.
140 &IDS
::call_suricatactrl
("reload");
143 ## Toggle Enabled/Disabled for an existing entry on the ignore list.
146 } elsif ($cgiparams{'WHITELIST'} eq $Lang::tr
{'toggle enable disable'}) {
149 # Only go further, if an ID has been passed.
150 if ($cgiparams{'ID'}) {
151 # Assign the given ID.
152 my $id = $cgiparams{'ID'};
154 # Undef the given ID.
155 undef($cgiparams{'ID'});
157 # Read-in ignoredfile.
158 &General
::readhasharray
($IDS::ignored_file
, \
%ignored);
160 # Grab the configured status of the corresponding entry.
161 my $status = $ignored{$id}[2];
164 if ($status eq "disabled") {
167 $status = "disabled";
170 # Modify the status of the existing entry.
171 $ignored{$id} = ["$ignored{$id}[0]", "$ignored{$id}[1]", "$status"];
173 # Write the changed ignored hash to the ignored file.
174 &General
::writehasharray
($IDS::ignored_file
, \
%ignored);
176 # Regenerate the ignore file.
177 &IDS
::generate_ignore_file
();
179 # Check if the IDS is running.
180 if(&IDS
::ids_is_running
()) {
181 # Call suricatactrl to perform a reload.
182 &IDS
::call_suricatactrl
("reload");
186 ## Remove entry from ignore list.
188 } elsif ($cgiparams{'WHITELIST'} eq $Lang::tr
{'remove'}) {
191 # Read-in ignoredfile.
192 &General
::readhasharray
($IDS::ignored_file
, \
%ignored);
194 # Drop entry from the hash.
195 delete($ignored{$cgiparams{'ID'}});
197 # Undef the given ID.
198 undef($cgiparams{'ID'});
200 # Write the changed ignored hash to the ignored file.
201 &General
::writehasharray
($IDS::ignored_file
, \
%ignored);
203 # Regenerate the ignore file.
204 &IDS
::generate_ignore_file
();
206 # Check if the IDS is running.
207 if(&IDS
::ids_is_running
()) {
208 # Call suricatactrl to perform a reload.
209 &IDS
::call_suricatactrl
("reload");
213 # Check if the page is locked, in this case, the ids_page_lock_file exists.
214 if (-e
$IDS::ids_page_lock_file
) {
215 # Lock the webpage and print notice about autoupgrade of the ruleset
217 &working_notice
("$Lang::tr{'ids ruleset autoupdate in progress'}");
219 # Loop and check if the file still exists.
220 while(-e
$IDS::ids_page_lock_file
) {
221 # Sleep for a second and re-check.
225 # Page has been unlocked, perform a reload.
229 # Check if any error has been stored.
230 if (-e
$IDS::storederrorfile
) {
231 # Open file to read in the stored error message.
232 open(FILE
, "<$IDS::storederrorfile") or die "Could not open $IDS::storederrorfile. $!\n";
234 # Read the stored error message.
235 $errormessage = <FILE
>;
240 # Delete the file, which is now not longer required.
241 unlink($IDS::storederrorfile
);
244 ## Grab all available rules and store them in the idsrules hash.
246 # Open rules directory and do a directory listing.
247 opendir(DIR
, $IDS::rulespath
) or die $!;
248 # Loop through the direcory.
249 while (my $file = readdir(DIR
)) {
251 # We only want files.
252 next unless (-f
"$IDS::rulespath/$file");
254 # Ignore empty files.
255 next if (-z
"$IDS::rulespath/$file");
257 # Use a regular expression to find files ending in .rules
258 next unless ($file =~ m/\.rules$/);
260 # Ignore files which are not read-able.
261 next unless (-R
"$IDS::rulespath/$file");
263 # Skip whitelist rules file.
264 next if( $file eq "whitelist.rules");
266 # Call subfunction to read-in rulefile and add rules to
268 &readrulesfile
("$file");
273 # Gather used rulefiles.
275 # Check if the file for activated rulefiles is not empty.
276 if(-f
$IDS::used_rulefiles_file
) {
277 # Open the file for used rulefile and read-in content.
278 open(FILE
, $IDS::used_rulefiles_file
) or die "Could not open $IDS::used_rulefiles_file. $!\n";
286 # Loop through the array.
287 foreach my $line (@lines) {
292 next if ($line =~ /\#/);
295 next if ($line =~ /^\s*$/);
297 # Gather rule sid and message from the ruleline.
298 if ($line =~ /.*- (.*)/) {
301 # Check if the current rulefile exists in the %idsrules hash.
302 # If not, the file probably does not exist anymore or contains
304 if($idsrules{$rulefile}) {
305 # Add the rulefile state to the %idsrules hash.
306 $idsrules{$rulefile}{'Rulefile'}{'State'} = "on";
312 # Save ruleset configuration.
313 if ($cgiparams{'RULESET'} eq $Lang::tr
{'save'}) {
317 # Read-in current (old) IDS settings.
318 &General
::readhash
("$IDS::rules_settings_file", \
%oldsettings);
320 # Get all available ruleset locations.
321 &General
::readhash
("$IDS::rulesetsourcesfile", \
%rulesetsources);
323 # Prevent form name from been stored in conf file.
324 delete $cgiparams{'RULESET'};
326 # Grab the URL based on the choosen vendor.
327 my $url = $rulesetsources{$cgiparams{'RULES'}};
329 # Check if the choosen vendor (URL) requires an subscription/oinkcode.
330 if ($url =~ /\<oinkcode\>/ ) {
331 # Check if an subscription/oinkcode has been provided.
332 if ($cgiparams{'OINKCODE'}) {
333 # Check if the oinkcode contains unallowed chars.
334 unless ($cgiparams{'OINKCODE'} =~ /^[a-z0-9]+$/) {
335 $errormessage = $Lang::tr
{'invalid input for oink code'};
338 # Print an error message, that an subsription/oinkcode is required for this
340 $errormessage = $Lang::tr
{'ids oinkcode required'};
344 # Go on if there are no error messages.
345 if (!$errormessage) {
346 # Store settings into settings file.
347 &General
::writehash
("$IDS::rules_settings_file", \
%cgiparams);
349 # Check if the the automatic rule update hass been touched.
350 if($cgiparams{'AUTOUPDATE_INTERVAL'} ne $oldsettings{'AUTOUPDATE_INTERVAL'}) {
351 # Call suricatactrl to set the new interval.
352 &IDS
::call_suricatactrl
("cron", $cgiparams{'AUTOUPDATE_INTERVAL'});
355 # Check if a ruleset is present - if not or the source has been changed download it.
356 if((! %idsrules) || ($oldsettings{'RULES'} ne $cgiparams{'RULES'})) {
357 # Check if the red device is active.
358 unless (-e
"${General::swroot}/red/active") {
359 $errormessage = "$Lang::tr{'could not download latest updates'} - $Lang::tr{'system is offline'}";
362 # Check if enought free disk space is availabe.
363 if(&IDS
::checkdiskspace
()) {
364 $errormessage = "$Lang::tr{'not enough disk space'}";
367 # Check if any errors happend.
368 unless ($errormessage) {
369 # Lock the webpage and print notice about downloading
371 &working_notice
("$Lang::tr{'ids working'}");
373 # Call subfunction to download the ruleset.
374 if(&IDS
::downloadruleset
()) {
375 $errormessage = $Lang::tr
{'could not download latest updates'};
377 # Call function to store the errormessage.
378 &IDS
::_store_error_message
($errormessage);
380 # Call subfunction to launch oinkmaster.
384 # Check if the IDS is running.
385 if(&IDS
::ids_is_running
()) {
386 # Call suricatactrl to stop the IDS - because of the changed
387 # ruleset - the use has to configure it before suricata can be
389 &IDS
::call_suricatactrl
("stop");
392 # Perform a reload of the page.
399 } elsif ($cgiparams{'RULESET'} eq $Lang::tr
{'ids apply'}) {
400 # Arrays to store which rulefiles have been enabled and will be used.
401 my @enabled_rulefiles;
403 # Hash to store the user-enabled and disabled sids.
404 my %enabled_disabled_sids;
406 # Loop through the hash of idsrules.
407 foreach my $rulefile(keys %idsrules) {
408 # Check if the rulefile is enabled.
409 if ($cgiparams{$rulefile} eq "on") {
410 # Add rulefile to the array of enabled rulefiles.
411 push(@enabled_rulefiles, $rulefile);
413 # Drop item from cgiparams hash.
414 delete $cgiparams{$rulefile};
418 # Read-in the files for enabled/disabled sids.
419 # This will be done by calling the read_enabled_disabled_sids_file function two times
420 # and merge the returned hashes together into the enabled_disabled_sids hash.
421 %enabled_disabled_sids = (
422 &read_enabled_disabled_sids_file
($IDS::disabled_sids_file
),
423 &read_enabled_disabled_sids_file
($IDS::enabled_sids_file
));
425 # Loop through the hash of idsrules.
426 foreach my $rulefile (keys %idsrules) {
427 # Loop through the single rules of the rulefile.
428 foreach my $sid (keys %{$idsrules{$rulefile}}) {
429 # Skip the current sid if it is not numeric.
430 next unless ($sid =~ /\d+/ );
432 # Check if there exists a key in the cgiparams hash for this sid.
433 if (exists($cgiparams{$sid})) {
434 # Look if the rule is disabled.
435 if ($idsrules{$rulefile}{$sid}{'State'} eq "off") {
436 # Check if the state has been set to 'on'.
437 if ($cgiparams{$sid} eq "on") {
438 # Add/Modify the sid to/in the enabled_disabled_sids hash.
439 $enabled_disabled_sids{$sid} = "enabled";
441 # Drop item from cgiparams hash.
442 delete $cgiparams{$rulefile}{$sid};
446 # Look if the rule is enabled.
447 if ($idsrules{$rulefile}{$sid}{'State'} eq "on") {
448 # Check if the state is 'on' and should be disabled.
449 # In this case there is no entry
450 # for the sid in the cgiparams hash.
451 # Add/Modify it to/in the enabled_disabled_sids hash.
452 $enabled_disabled_sids{$sid} = "disabled";
454 # Drop item from cgiparams hash.
455 delete $cgiparams{$rulefile}{$sid};
461 # Open enabled sid's file for writing.
462 open(ENABLED_FILE
, ">$IDS::enabled_sids_file") or die "Could not write to $IDS::enabled_sids_file. $!\n";
464 # Open disabled sid's file for writing.
465 open(DISABLED_FILE
, ">$IDS::disabled_sids_file") or die "Could not write to $IDS::disabled_sids_file. $!\n";
467 # Write header to the files.
468 print ENABLED_FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
469 print DISABLED_FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
471 # Check if the hash for enabled/disabled files contains any entries.
472 if (%enabled_disabled_sids) {
473 # Loop through the hash.
474 foreach my $sid (keys %enabled_disabled_sids) {
475 # Check if the sid is enabled.
476 if ($enabled_disabled_sids{$sid} eq "enabled") {
477 # Print the sid to the enabled_sids file.
478 print ENABLED_FILE
"enablesid $sid\n";
479 # Check if the sid is disabled.
480 } elsif ($enabled_disabled_sids{$sid} eq "disabled") {
481 # Print the sid to the disabled_sids file.
482 print DISABLED_FILE
"disablesid $sid\n";
483 # Something strange happende - skip the current sid.
490 # Close file for enabled_sids after writing.
493 # Close file for disabled_sids after writing.
494 close(DISABLED_FILE
);
496 # Call function to generate and write the used rulefiles file.
497 &IDS
::write_used_rulefiles_file
(@enabled_rulefiles);
499 # Lock the webpage and print message.
500 &working_notice
("$Lang::tr{'ids apply ruleset changes'}");
502 # Call oinkmaster to alter the ruleset.
505 # Check if the IDS is running.
506 if(&IDS
::ids_is_running
()) {
507 # Call suricatactrl to perform a reload.
508 &IDS
::call_suricatactrl
("reload");
514 # Download new ruleset.
515 } elsif ($cgiparams{'RULESET'} eq $Lang::tr
{'update ruleset'}) {
516 # Check if the red device is active.
517 unless (-e
"${General::swroot}/red/active") {
518 $errormessage = "$Lang::tr{'could not download latest updates'} - $Lang::tr{'system is offline'}";
521 # Check if enought free disk space is availabe.
522 if(&IDS
::checkdiskspace
()) {
523 $errormessage = "$Lang::tr{'not enough disk space'}";
526 # Check if any errors happend.
527 unless ($errormessage) {
528 # Lock the webpage and print notice about downloading
530 &working_notice
("$Lang::tr{'ids download new ruleset'}");
532 # Call subfunction to download the ruleset.
533 if(&IDS
::downloadruleset
()) {
534 $errormessage = $Lang::tr
{'could not download latest updates'};
536 # Call function to store the errormessage.
537 &IDS
::_store_error_message
($errormessage);
539 # Preform a reload of the page.
542 # Call subfunction to launch oinkmaster.
545 # Check if the IDS is running.
546 if(&IDS
::ids_is_running
()) {
547 # Call suricatactrl to perform a reload.
548 &IDS
::call_suricatactrl
("reload");
551 # Perform a reload of the page.
556 } elsif ($cgiparams{'IDS'} eq $Lang::tr
{'save'}) {
559 my $monitored_zones = 0;
561 # Read-in current (old) IDS settings.
562 &General
::readhash
("$IDS::ids_settings_file", \
%oldidssettings);
564 # Prevent form name from been stored in conf file.
565 delete $cgiparams{'IDS'};
567 # Check if the IDS should be enabled.
568 if ($cgiparams{'ENABLE_IDS'} eq "on") {
569 # Check if any ruleset is available. Otherwise abort and display an error.
571 $errormessage = $Lang::tr
{'ids no ruleset available'};
574 # Loop through the array of available interfaces.
575 foreach my $zone (@network_zones) {
576 # Convert interface name into upper case.
577 my $zone_upper = uc($zone);
579 # Check if the IDS is enabled for this interaces.
580 if ($cgiparams{"ENABLE_IDS_$zone_upper"}) {
586 # Check if at least one zone should be monitored, or show an error.
587 unless ($monitored_zones >= 1) {
588 $errormessage = $Lang::tr
{'ids no network zone'};
592 # Go on if there are no error messages.
593 if (!$errormessage) {
594 # Store settings into settings file.
595 &General
::writehash
("$IDS::ids_settings_file", \
%cgiparams);
598 # Generate file to store the home net.
599 &IDS
::generate_home_net_file
();
601 # Temporary variable to set the ruleaction.
602 # Default is "drop" to use suricata as IPS.
603 my $ruleaction="drop";
605 # Check if the traffic only should be monitored.
606 if($cgiparams{'MONITOR_TRAFFIC_ONLY'} eq 'on') {
607 # Switch the ruleaction to "alert".
608 # Suricata acts as an IDS only.
612 # Write the modify sid's file and pass the taken ruleaction.
613 &IDS
::write_modify_sids_file
($ruleaction);
615 # Check if "MONITOR_TRAFFIC_ONLY" has been changed.
616 if($cgiparams{'MONITOR_TRAFFIC_ONLY'} ne $oldidssettings{'MONITOR_TRAFFIC_ONLY'}) {
617 # Check if a ruleset exists.
619 # Lock the webpage and print message.
620 &working_notice
("$Lang::tr{'ids working'}");
622 # Call oinkmaster to alter the ruleset.
625 # Set reload_page to "True".
630 # Check if the IDS currently is running.
631 if(&IDS
::ids_is_running
()) {
632 # Check if ENABLE_IDS is set to on.
633 if($cgiparams{'ENABLE_IDS'} eq "on") {
634 # Call suricatactrl to perform a reload of suricata.
635 &IDS
::call_suricatactrl
("reload");
637 # Call suricatactrl to stop suricata.
638 &IDS
::call_suricatactrl
("stop");
641 # Call suricatactrl to start suricata.
642 &IDS
::call_suricatactrl
("start");
645 # Check if the page should be reloaded.
647 # Perform a reload of the page.
652 # Read-in idssettings and rulesetsettings
653 &General
::readhash
("$IDS::ids_settings_file", \
%idssettings);
654 &General
::readhash
("$IDS::rules_settings_file", \
%rulessettings);
656 # If no autoupdate intervall has been configured yet, set default value.
657 unless(exists($rulessettings{'AUTOUPDATE_INTERVAL'})) {
658 # Set default to "weekly".
659 $rulessettings{'AUTOUPDATE_INTERVAL'} = 'weekly';
662 # Read-in ignored hosts.
663 &General
::readhasharray
("$IDS::settingsdir/ignored", \
%ignored);
665 $checked{'ENABLE_IDS'}{'off'} = '';
666 $checked{'ENABLE_IDS'}{'on'} = '';
667 $checked{'ENABLE_IDS'}{$idssettings{'ENABLE_IDS'}} = "checked='checked'";
668 $checked{'MONITOR_TRAFFIC_ONLY'}{'off'} = '';
669 $checked{'MONITOR_TRAFFIC_ONLY'}{'on'} = '';
670 $checked{'MONITOR_TRAFFIC_ONLY'}{$idssettings{'MONITOR_TRAFFIC_ONLY'}} = "checked='checked'";
671 $selected{'RULES'}{'nothing'} = '';
672 $selected{'RULES'}{'community'} = '';
673 $selected{'RULES'}{'emerging'} = '';
674 $selected{'RULES'}{'registered'} = '';
675 $selected{'RULES'}{'subscripted'} = '';
676 $selected{'RULES'}{$rulessettings{'RULES'}} = "selected='selected'";
677 $selected{'AUTOUPDATE_INTERVAL'}{'off'} = '';
678 $selected{'AUTOUPDATE_INTERVAL'}{'daily'} = '';
679 $selected{'AUTOUPDATE_INTERVAL'}{'weekly'} = '';
680 $selected{'AUTOUPDATE_INTERVAL'}{$rulessettings{'AUTOUPDATE_INTERVAL'}} = "selected='selected'";
682 &Header
::openpage
($Lang::tr
{'intrusion detection system'}, 1, '');
687 # Java script variable declaration for show and hide.
688 print"var show = \"$Lang::tr{'ids show'}\"\;\n";
689 print"var hide = \"$Lang::tr{'ids hide'}\"\;\n";
692 // Java Script function to show/hide the text input field for
693 // Oinkcode/Subscription code.
694 var update_code = function() {
695 if(\$('#RULES').val() == 'registered') {
697 } else if(\$('#RULES').val() == 'subscripted') {
699 } else if(\$('#RULES').val() == 'emerging_pro') {
706 // JQuery function to call corresponding function when
707 // the ruleset is changed or the page is loaded for showing/hiding
709 \$(document).ready(function() {
710 \$('#RULES').change(update_code);
714 // Tiny java script function to show/hide the rules
715 // of a given category.
716 function showhide(tblname) {
717 \$("#" + tblname).toggle();
719 // Get current content of the span element.
720 var content = document.getElementById("span_" + tblname);
722 if (content.innerHTML === show) {
723 content.innerHTML = hide;
725 content.innerHTML = show;
732 &Header
::openbigbox
('100%', 'left', '', $errormessage);
735 &Header
::openbox
('100%', 'left', $Lang::tr
{'error messages'});
736 print "<class name='base'>$errormessage\n";
737 print " </class>\n";
741 # Draw current state of the IDS
742 &Header
::openbox
('100%', 'left', $Lang::tr
{'intrusion detection system'});
744 # Check if the IDS is running and obtain the process-id.
745 my $pid = &IDS
::ids_is_running
();
747 # Display some useful information, if suricata daemon is running.
749 # Gather used memory.
750 my $memory = &get_memory_usage
($pid);
753 <table width='95%' cellspacing='0' class='tbl'>
755 <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'intrusion detection'}</strong></th>
759 <td class='base'>$Lang::tr{'guardian daemon'}</td>
760 <td align='center' colspan='2' width='75%' bgcolor='${Header::colourgreen}'><font color='white'><strong>$Lang::tr{'running'}</strong></font></td>
764 <td class='base'></td>
765 <td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
766 <td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
770 <td class='base'></td>
771 <td bgcolor='$color{'color22'}' align='center'>$pid</td>
772 <td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
777 # Otherwise display a hint that the service is not launched.
779 <table width='95%' cellspacing='0' class='tbl'>
781 <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'intrusion detection'}</strong></th>
785 <td class='base'>$Lang::tr{'guardian daemon'}</td>
786 <td align='center' width='75%' bgcolor='${Header::colourred}'><font color='white'><strong>$Lang::tr{'stopped'}</strong></font></td>
792 # Only show this area, if a ruleset is present.
797 <br><br><h2>$Lang::tr{'settings'}</h2>
799 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
800 <table width='100%' border='0'>
802 <td class='base' colspan='2'>
803 <input type='checkbox' name='ENABLE_IDS' $checked{'ENABLE_IDS'}{'on'}> $Lang::tr{'ids enable'}
806 <td class='base' colspan='2'>
807 <input type='checkbox' name='MONITOR_TRAFFIC_ONLY' $checked{'MONITOR_TRAFFIC_ONLY'}{'on'}> $Lang::tr{'ids monitor traffic only'}
819 <td colspan='4'><b>$Lang::tr{'ids monitored interfaces'}</b><br></td>
826 # Loop through the array of available networks and print config options.
827 foreach my $zone (@network_zones) {
831 # Convert current zone name to upper case.
832 my $zone_upper = uc($zone);
835 my $zone_name = $zone;
837 # Dirty hack to get the correct language string for the red zone.
838 if ($zone eq "red") {
842 # Grab checkbox status from settings hash.
843 if ($idssettings{"ENABLE_IDS_$zone_upper"} eq "on") {
844 $checked_input = "checked = 'checked'";
847 print "<td class='base' width='25%'>\n";
848 print "<input type='checkbox' name='ENABLE_IDS_$zone_upper' $checked_input>\n";
849 print " $Lang::tr{'enabled on'}<font color='$colourhash{$zone}'> $Lang::tr{$zone_name}</font>\n";
861 <td align='right'><input type='submit' name='IDS' value='$Lang::tr{'save'}' /></td>
872 # Draw elements for ruleset configuration.
873 &Header
::openbox
('100%', 'center', $Lang::tr
{'ids ruleset settings'});
876 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
877 <table width='100%' border='0'>
879 <td><b>$Lang::tr{'ids rules update'}</b></td>
880 <td><b>$Lang::tr{'ids automatic rules update'}</b></td>
884 <td><select name='RULES' id='RULES'>
885 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
886 <option value='emerging_pro' $selected{'RULES'}{'emerging_pro'} >$Lang::tr{'emerging pro rules'}</option>
887 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
888 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
889 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
894 <select name='AUTOUPDATE_INTERVAL'>
895 <option value='off' $selected{'AUTOUPDATE_INTERVAL'}{'off'} >- $Lang::tr{'Disabled'} -</option>
896 <option value='daily' $selected{'AUTOUPDATE_INTERVAL'}{'daily'} >$Lang::tr{'Daily'}</option>
897 <option value='weekly' $selected{'AUTOUPDATE_INTERVAL'}{'weekly'} >$Lang::tr{'Weekly'}</option>
903 <td colspan='2'><br><br></td>
906 <tr style='display:none' id='code'>
907 <td colspan='2'>Oinkcode: <input type='text' size='40' name='OINKCODE' value='$rulessettings{'OINKCODE'}'></td>
916 # Show the "Update Ruleset"-Button only if a ruleset has been downloaded yet and automatic updates are disabled.
917 if ((%idsrules) && ($rulessettings{'AUTOUPDATE_INTERVAL'} eq "off")) {
918 # Display button to update the ruleset.
919 print"<input type='submit' name='RULESET' value='$Lang::tr{'update ruleset'}'>\n";
922 <input type='submit' name='RULESET' value='$Lang::tr{'save'}'>
934 # Whitelist / Ignorelist
936 &Header
::openbox
('100%', 'center', $Lang::tr
{'ids ignored hosts'});
941 <td class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'ip address'}</b></td>
942 <td class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'remark'}</b></td>
943 <td class='base' colspan='3' bgcolor='$color{'color20'}'></td>
946 # Check if some hosts have been added to be ignored.
947 if (keys (%ignored)) {
950 # Loop through all entries of the hash.
951 while( (my $key) = each %ignored) {
952 # Assign data array positions to some nice variable names.
953 my $address = $ignored{$key}[0];
954 my $remark = $ignored{$key}[1];
955 my $status = $ignored{$key}[2];
957 # Check if the key (id) number is even or not.
958 if ($cgiparams{'ID'} eq $key) {
959 $col="bgcolor='${Header::colouryellow}'";
961 $col="bgcolor='$color{'color22'}'";
963 $col="bgcolor='$color{'color20'}'";
966 # Choose icon for the checkbox.
970 # Check if the status is enabled and select the correct image and description.
971 if ($status eq 'enabled' ) {
973 $gdesc = $Lang::tr
{'click to disable'};
976 $gdesc = $Lang::tr
{'click to enable'};
981 <td width='20%' class='base' $col>$address</td>
982 <td width='65%' class='base' $col>$remark</td>
984 <td align='center' $col>
985 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
986 <input type='hidden' name='WHITELIST' value='$Lang::tr{'toggle enable disable'}' />
987 <input type='image' name='$Lang::tr{'toggle enable disable'}' src='/images/$gif' alt='$gdesc' title='$gdesc' />
988 <input type='hidden' name='ID' value='$key' />
992 <td align='center' $col>
993 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
994 <input type='hidden' name='WHITELIST' value='$Lang::tr{'edit'}' />
995 <input type='image' name='$Lang::tr{'edit'}' src='/images/edit.gif' alt='$Lang::tr{'edit'}' title='$Lang::tr{'edit'}' />
996 <input type='hidden' name='ID' value='$key' />
1000 <td align='center' $col>
1001 <form method='post' name='$key' action='$ENV{'SCRIPT_NAME'}'>
1002 <input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}'>
1003 <input type='hidden' name='ID' value='$key'>
1004 <input type='hidden' name='WHITELIST' value='$Lang::tr{'remove'}'>
1011 # Print notice that currently no hosts are ignored.
1013 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
1019 # Section to add new elements or edit existing ones.
1025 <div align='center'>
1026 <table width='100%'>
1029 # Assign correct headline and button text.
1034 # Check if an ID (key) has been given, in this case an existing entry should be edited.
1035 if ($cgiparams{'ID'} ne '') {
1036 $buttontext = $Lang::tr
{'update'};
1037 print "<tr><td class='boldbase' colspan='3'><b>$Lang::tr{'update'}</b></td></tr>\n";
1039 # Grab address and remark for the given key.
1040 $entry_address = $ignored{$cgiparams{'ID'}}[0];
1041 $entry_remark = $ignored{$cgiparams{'ID'}}[1];
1043 $buttontext = $Lang::tr
{'add'};
1044 print "<tr><td class='boldbase' colspan='3'><b>$Lang::tr{'dnsforward add a new entry'}</b></td></tr>\n";
1048 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
1049 <input type='hidden' name='ID' value='$cgiparams{'ID'}'>
1051 <td width='30%'>$Lang::tr{'ip address'}: </td>
1052 <td width='50%'><input type='text' name='IGNORE_ENTRY_ADDRESS' value='$entry_address' size='24' /></td>
1054 <td width='30%'>$Lang::tr{'remark'}: </td>
1055 <td wicth='50%'><input type='text' name=IGNORE_ENTRY_REMARK value='$entry_remark' size='24' /></td>
1056 <td align='center' width='20%'><input type='submit' name='WHITELIST' value='$buttontext' /></td>
1063 &Header
::closebox
();
1065 # Only show the section for configuring the ruleset if one is present.
1067 # Load neccessary perl modules for file stat and to format the timestamp.
1069 use POSIX
qw( strftime );
1071 # Call stat on the rulestarball.
1072 my $stat = stat("$IDS::rulestarball");
1074 # Get timestamp the file creation.
1075 my $mtime = $stat->mtime;
1077 # Convert into human read-able format.
1078 my $rulesdate = strftime
('%Y-%m-%d %H:%M:%S', localtime($mtime));
1080 &Header
::openbox
('100%', 'LEFT', "$Lang::tr{'intrusion detection system rules'} ($rulesdate)" );
1082 print"<form method='POST' action='$ENV{'SCRIPT_NAME'}'>\n";
1084 # Output display table for rule files
1085 print "<table width='100%'>\n";
1087 # Loop over each rule file
1088 foreach my $rulefile (sort keys(%idsrules)) {
1089 my $rulechecked = '';
1091 # Check if rule file is enabled
1092 if ($idsrules{$rulefile}{'Rulefile'}{'State'} eq 'on') {
1093 $rulechecked = 'CHECKED';
1096 # Convert rulefile name into category name.
1097 my $categoryname = &_rulefile_to_category
($rulefile);
1099 # Table and rows for the rule files.
1101 print"<td class='base' width='5%'>\n";
1102 print"<input type='checkbox' name='$rulefile' $rulechecked>\n";
1104 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
1105 print"<td class='base' width='5%' align='right'>\n";
1106 print"<a href=\"javascript:showhide('$categoryname')\"><span id='span_$categoryname'>$Lang::tr{'ids show'}</span></a>\n";
1110 # Rows which will be hidden per default and will contain the single rules.
1111 print"<tr style='display:none' id='$categoryname'>\n";
1112 print"<td colspan='3'>\n";
1119 # New table for the single rules.
1120 print "<table width='100%'>\n";
1122 # Loop over rule file rules
1123 foreach my $sid (sort {$a <=> $b} keys(%{$idsrules{$rulefile}})) {
1125 my $ruledefchecked = '';
1127 # Skip rulefile itself.
1128 next if ($sid eq "Rulefile");
1130 # If 2 rules have been displayed, start a new row
1131 if (($lines % 2) == 0) {
1132 print "</tr><tr>\n";
1134 # Increase rows by once.
1140 $col="bgcolor='$color{'color20'}'";
1142 $col="bgcolor='$color{'color22'}'";
1146 if ($idsrules{$rulefile}{$sid}{'State'} eq 'on') {
1147 $ruledefchecked = 'CHECKED';
1150 # Create rule checkbox and display rule description
1151 print "<td class='base' width='5%' align='right' $col>\n";
1152 print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
1154 print "<td class='base' width='45%' $col>$idsrules{$rulefile}{$sid}{'Description'}</td>";
1156 # Increment rule count
1160 # If do not have a second rule for row, create empty cell
1161 if (($lines % 2) != 0) {
1162 print "<td class='base'></td>";
1165 # Close display table
1166 print "</tr></table></td></tr>";
1169 # Close display table
1173 <table width='100%'>
1175 <td width='100%' align='right'><input type='submit' name='RULESET' value='$Lang::tr{'ids apply'}'></td>
1181 &Header
::closebox
();
1184 &Header
::closebigbox
();
1185 &Header
::closepage
();
1188 ## A function to display a notice, to lock the webpage and
1189 ## tell the user which action currently will be performed.
1191 sub working_notice
($) {
1194 &Header
::openpage
($Lang::tr
{'intrusion detection system'}, 1, '');
1195 &Header
::openbigbox
('100%', 'left', '', $errormessage);
1196 &Header
::openbox
( 'Waiting', 1,);
1200 <td><img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' /></td>
1205 &Header
::closebox
();
1206 &Header
::closebigbox
();
1207 &Header
::closepage
();
1211 ## A tiny function to perform a reload of the webpage after one second.
1214 print "<meta http-equiv='refresh' content='1'>\n";
1221 ## Private function to read-in and parse rules of a given rulefile.
1223 ## The given file will be read, parsed and all valid rules will be stored by ID,
1224 ## message/description and it's state in the idsrules hash.
1226 sub readrulesfile
($) {
1227 my $rulefile = shift;
1229 # Open rule file and read in contents
1230 open(RULEFILE
, "$IDS::rulespath/$rulefile") or die "Unable to read $rulefile!";
1232 # Store file content in an array.
1233 my @lines = <RULEFILE
>;
1238 # Loop over rule file contents
1239 foreach my $line (@lines) {
1240 # Remove whitespaces.
1244 next if ($line =~ /^\s*$/);
1250 # Gather rule sid and message from the ruleline.
1251 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
1255 # Check if a rule has been found.
1257 # Add rule to the idsrules hash.
1258 $idsrules{$rulefile}{$sid}{'Description'} = $msg;
1260 # Grab status of the rule. Check if ruleline starts with a "dash".
1261 if ($line =~ /^\#/) {
1262 # If yes, the rule is disabled.
1263 $idsrules{$rulefile}{$sid}{'State'} = "off";
1265 # Otherwise the rule is enabled.
1266 $idsrules{$rulefile}{$sid}{'State'} = "on";
1274 ## Function to get the used memory of a given process-id.
1276 sub get_memory_usage
($) {
1281 # Try to open the status file for the given process-id on the pseudo
1283 if (open(FILE
, "/proc/$pid/status")) {
1284 # Loop through the entire file.
1286 # Splitt current line content and store them into variables.
1287 my ($key, $value) = split(":", $_, 2);
1289 # Check if the current key is the one which contains the memory usage.
1290 # The wanted one is VmRSS which contains the Real-memory (resident set)
1291 # of the entire process.
1292 if ($key eq "VmRSS") {
1293 # Found the memory usage add it to the memory variable.
1301 # Close file handle.
1304 # Return memory usage.
1308 # If the file could not be open, return nothing.
1313 ## Function to read-in the given enabled or disables sids file.
1315 sub read_enabled_disabled_sids_file
($) {
1318 # Temporary hash to store the sids and their state. It will be
1319 # returned at the end of this function.
1322 # Open the given filename.
1323 open(FILE
, "$file") or die "Could not open $file. $!\n";
1325 # Loop through the file.
1331 next if ($_ =~ /^\s*$/);
1334 next if ($_ =~ /^\#/);
1336 # Splitt line into sid and state part.
1337 my ($state, $sid) = split(" ", $_);
1339 # Skip line if the sid is not numeric.
1340 next unless ($sid =~ /\d+/ );
1342 # Check if the sid was enabled.
1343 if ($state eq "enablesid") {
1344 # Add the sid and its state as enabled to the temporary hash.
1345 $temphash{$sid} = "enabled";
1346 # Check if the sid was disabled.
1347 } elsif ($state eq "disablesid") {
1348 # Add the sid and its state as disabled to the temporary hash.
1349 $temphash{$sid} = "disabled";
1350 # Invalid state - skip the current sid and state.
1364 ## Private function to convert a given rulefile to a category name.
1365 ## ( No file extension anymore and if the name contained a dot, it
1366 ## would be replaced by a underline sign.)
1368 sub _rulefile_to_category
($) {
1369 my ($filename) = @_;
1371 # Splitt the filename into single chunks and store them in a
1373 my @parts = split(/\./, $filename);
1375 # Return / Remove last element of the temporary array.
1376 # This removes the file extension.
1379 # Join together the single elements of the temporary array.
1380 # If these are more than one, use a "underline" for joining.
1381 my $category = join '_', @parts;
1383 # Return the converted filename.