]>
git.ipfire.org Git - people/stevee/ipfire-2.x.git/blob - html/cgi-bin/guardian.cgi
2 ###############################################################################
4 # IPFire.org - A linux based firewall #
5 # Copyright (C) 2014 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 ###############################################################################
25 # enable only the following on debugging purpose
27 use CGI
::Carp
'fatalsToBrowser';
29 require '/var/ipfire/general-functions.pl';
30 require "${General::swroot}/lang.pl";
31 require "${General::swroot}/header.pl";
33 #workaround to suppress a warning when a variable is used only once
34 my @dummy = ( ${Header
::colouryellow
} );
43 # Path to the guardian.ignore file.
44 my $ignorefile ='/var/ipfire/guardian/guardian.ignore';
46 our %netsettings = ();
47 &General
::readhash
("${General::swroot}/ethernet/settings", \
%netsettings);
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);
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';
66 $settings{'ACTION'} = '';
68 my $errormessage = '';
70 &Header
::showhttpheaders
();
73 &Header
::getcgihash
(\
%settings);
75 # Check if guardian is running and grab some stats.
79 ## Perform input checks and save settings.
81 if ($settings{'ACTION'} eq $Lang::tr
{'save'}) {
82 # Check for valid blocktime.
83 if (! $settings{'GUARDIAN_BLOCKTIME'} =~ /^\d+$/) {
84 $errormessage = "$Lang::tr{'guardian invalid blocktime'}";
87 # Check if the bloccount is valid.
88 if (! $settings{'GUARDIAN_BLOCKCOUNT'} =~ /^\d+$/) {
89 $errormessage = "$Lang::tr{'guardian invalid blockcount'}";
93 if (! $settings{'GUARDIAN_LOGFILE'} =~ /^[a-zA-Z0-9\.\/]+$/) {
94 $errormessage = "$Lang::tr{'guardian invalid logfile'}";
97 # Check input for snort alert file.
98 if (! $settings{'GUARDIAN_SNORT_ALERTFILE'} =~ /^[a-zA-Z0-9\.\/]+$/) {
99 $errormessage = "$Lang::tr{'guardian invalid alertfile'}";
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);
107 # Update configuration files.
108 &BuildConfiguration
();
111 ## Add a new entry to the ignore file.
113 } elsif ($settings{'ACTION'} eq $Lang::tr
{'add'}) {
115 # Check if any input has been performed.
116 if ($settings{'NEW_IGNORE_ENTRY'} ne '') {
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'}";
123 $errormessage = "$Lang::tr{'guardian empty input'}";
126 # Go further if there was no error.
127 if ($errormessage eq '') {
128 my $new_entry = $settings{'NEW_IGNORE_ENTRY'};
130 # Open file for appending the new entry.
131 open (FILE
, ">>$ignorefile") or die "Unable to open $ignorefile for writing";
133 # Write the new entry to the ignore file.
134 print FILE
"$new_entry\n";
138 # Check if guardian is running.
140 # Call guardianctrl to perform a reload.
141 system("/usr/local/bin/guardianctrl reload &>/dev/null");
144 ## Remove entry from ignore list.
146 } elsif ($settings{'ACTION'} eq $Lang::tr
{'remove'}) {
149 # Open ignorefile and read content.
150 open(FILE
, "<$ignorefile") or die "Unable to open $ignorefile.";
151 my @current = <FILE
>;
154 # Re-open ignorefile for writing.
155 open(FILE
, ">$ignorefile") or die "Unable to open $ignorefile for writing";
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 $line (@current) {
162 unless ($settings{'ID'} eq $id) {
168 # Check if guardian is running.
170 # Call guardianctrl to perform a reload.
171 system("/usr/local/bin/guardianctrl reload &>/dev/null");
174 ## Block a user given address or subnet.
176 } elsif ($settings{'ACTION'} eq $Lang::tr
{'block'}) {
178 # Check if no empty input has been performed.
179 if ($settings{'ADDRESS_BLOCK'} ne '') {
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'}";
187 $errormessage = "$Lang::tr{'guardian empty input'}";
190 # Go further if there was no error.
191 if ($errormessage eq '') {
192 my $block = $settings{'ADDRESS_BLOCK'};
194 # Call helper to unblock address.
195 system("/usr/local/bin/guardianctrl block $block &>/dev/null");
198 ## Unblock address or subnet.
200 } elsif ($settings{'ACTION'} eq $Lang::tr
{'unblock'}) {
202 # Check if no empty input has been performed.
203 if ($settings{'ADDRESS_UNBLOCK'} ne '') {
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'}";
211 $errormessage = "$Lang::tr{'guardian empty input'}";
214 # Go further if there was no error.
215 if ($errormessage eq '') {
216 my $unblock = $settings{'ADDRESS_UNBLOCK'};
218 # Call helper to unblock address.
219 system("/usr/local/bin/guardianctrl unblock $unblock &>/dev/null");
224 } elsif ($settings{'ACTION'} eq $Lang::tr
{'unblock all'}) {
226 # Call helper to flush iptables chain from guardian.
227 system("/usr/local/bin/guardianctrl flush-chain &>/dev/null");
230 # Load settings from file.
231 &General
::readhash
("${General::swroot}/guardian/settings", \
%settings);
235 # Call functions to generate whole page.
239 # Display area only if guardian is running.
240 if ( ($memory != 0) && ($pid > 0) ) {
244 # Function to display the status of guardian and allow base configuration.
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'";
262 $selected{'GUARDIAN_LOGLEVEL'}{$settings{'GUARDIAN_LOGLEVEL'}}= 'selected';
264 &Header
::openpage
($Lang::tr
{'guardian configuration'}, 1, '');
265 &Header
::openbigbox
('100%', 'left', '', $errormessage);
267 # Print errormessage if there is one.
269 &Header
::openbox
('100%', 'left', $Lang::tr
{'error messages'});
270 print "<font class='base'>$errormessage </font>\n";
275 # Draw current guardian state.
276 &Header
::openbox
('100%', 'center', $Lang::tr
{'guardian'});
278 # Get current status of guardian.
282 # Display some useful information related to guardian, if daemon is running.
283 if ( ($memory != 0) && ($pid > 0) ){
285 <table width='95%' cellspacing='0' class='tbl'>
287 <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
290 <td class='base'>$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>
294 <td class='base'></td>
295 <td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
296 <td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
299 <td class='base'></td>
300 <td bgcolor='$color{'color22'}' align='center'>@pid[0]</td>
301 <td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
306 # Otherwise display a hint that the service is not launched.
308 <table width='95%' cellspacing='0' class='tbl'>
310 <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
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>
322 # Draw elements for guardian configuration.
323 &Header
::openbox
('100%', 'center', $Lang::tr
{'guardian configuration'});
326 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
330 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian common settings'}</b></td>
333 <td width='20%' class='base'>$Lang::tr{'guardian enabled'}:</td>
334 <td><input type='checkbox' name='GUARDIAN_ENABLED' $checked{'GUARDIAN_ENABLED'}{'on'} /></td>
337 <td colspan='2'><br></td>
340 <td width='20%' class='base'>$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' $checked{'GUARDIAN_ENABLE_SNORT'}{'off'} /> off</td>
345 <td width='20%' class='base'>$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' $checked{'GUARDIAN_ENABLE_SSH'}{'off'} /> off</td>
350 <td width='20%' class='base'>$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' $checked{'GUARDIAN_ENABLE_HTTPD'}{'off'} /> off</td>
355 <td colspan='2'><br></td>
358 <td align='left' width='20%'>$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' $selected{'GUARDIAN_LOGLEVEL'}{'debug'}>debug</option>
366 <td colspan='2'><br></td>
369 <td width='20%' class='base'>$Lang::tr{'guardian blockcount'}:</td>
370 <td><input type='text' name='GUARDIAN_BLOCKCOUNT' value='$settings{'GUARDIAN_BLOCKCOUNT'}' size='5' /></td>
373 <td width='20%' class='base'>$Lang::tr{'guardian blocktime'}:</td>
374 <td><input type='text' name='GUARDIAN_BLOCKTIME' value='$settings{'GUARDIAN_BLOCKTIME'}' size='10' /></td>
377 <td width='20%' class='base'>$Lang::tr{'guardian logfile'}:</td>
378 <td><input type='text' name='GUARDIAN_LOGFILE' value='$settings{'GUARDIAN_LOGFILE'}' size='30' /></td>
381 <td width='20%' class='base'>$Lang::tr{'guardian snort alertfile'}:</td>
382 <td><input type='text' name='GUARDIAN_SNORT_ALERTFILE' value='$settings{'GUARDIAN_SNORT_ALERTFILE'}' size='30' /></td>
393 <td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
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', $Lang::tr
{'guardian ignored hosts'});
410 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian ignored hosts'}</b></td>
413 # Check if the guardian ignore file contains any content.
414 if (-s
$ignorefile) {
416 # Open file and print contents.
417 open FILE
, $ignorefile or die "Could not open $ignorefile";
422 # Read file line by line and print out the elements.
423 while( my $ignored_element = <FILE
> ) {
425 # Increase id number for each element in the ignore file.
428 # Check if the id number is even or not.
430 $col="bgcolor='$color{'color22'}'";
432 $col="bgcolor='$color{'color20'}'";
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'}'>
450 # Print notice that currently no elements are stored in the ignore file.
452 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
458 # Section to add new elements to the ignore list.
463 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
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>
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', $Lang::tr
{'guardian blocked hosts'});
484 <td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian blocked hosts'}</b></td>
488 # Lauch function to get the currently blocked hosts.
489 my @blocked_hosts = &GetBlockedHosts
();
494 # Loop through our blocked hosts array.
495 foreach my $blocked_host (@blocked_hosts) {
497 # Increase id number for each element in the ignore file.
500 # Check if the id number is even or not.
502 $col="bgcolor='$color{'color22'}'";
504 $col="bgcolor='$color{'color20'}'";
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'}'>
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.
525 # Print notice that currently no hosts are blocked.
527 print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
533 # Section for a manual block of an IP-address.
537 <table width='60%' border='0'>
538 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
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>
553 &Header
::closebigbox
();
554 &Header
::closepage
();
556 # Function to check if guardian has been started.
557 # Grab process id and consumed memory if the daemon is running.
561 open(FILE
, '/usr/local/bin/addonctrl guardian status | ');
564 $string = join("", @guardian);
565 $string =~ s/[a-z_]//gi;
566 $string =~ s/\[[0-1]\;[0-9]+//gi;
567 $string =~ s/[\(\)\.]//gi;
570 @pid = split(/\s/,$string);
571 if (open(FILE
, "/proc/$pid[0]/statm")){
573 @memory = split(/ /,$temp);
579 sub GetBlockedHosts
() {
581 # Create new, empty array.
584 # Lauch helper to get chains from iptables.
585 open(FILE
, "/usr/local/bin/guardianctrl get-chain |");
587 # Read file line by line and print out the elements.
588 foreach my $line (<FILE
>) {
590 # Skip descriptive lines.
591 next if ($line =~ /^Chain/);
592 next if ($line =~ /^ pkts/);
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;
598 # Assign different variable names.
599 my $blocked_host = $source;
601 # Add host to our hosts array.
602 push(@hosts, $blocked_host);
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(/\./, $_))] }
611 # Return our sorted list.
615 sub BuildConfiguration
() {
617 &General
::readhash
("${General::swroot}/guardian/settings", \
%settings);
619 my $configfile = "${General::swroot}/guardian/guardian.conf";
621 # We set this to 1 (enabled) to prevent guardian from blocking the ISP gateway.
622 my $HostGatewayByte = "1";
624 # Open configfile for writing.
625 open(FILE
, ">$configfile");
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 $settings{'GUARDIAN_BLOCKTIME'}\n";
640 # Check if guardian should be started or stopped.
641 if($settings{'GUARDIAN_ENABLED'} eq 'on') {
643 # Call guardianctl to perform a reload.
644 system("/usr/local/bin/guardianctrl reload &>/dev/null");
647 system("/usr/local/bin/guardianctrl start &>/dev/null");
651 system("/usr/local/bin/guardianctrl stop &>/dev/null");