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https://github.com/vincentmli/bpfire.git
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566 lines
18 KiB
Perl
Executable File
566 lines
18 KiB
Perl
Executable File
#!/usr/bin/perl
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###############################################################################
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# #
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# IPFire.org - A linux based firewall #
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# Copyright (C) 2014 IPFire Team <info@ipfire.org> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <http://www.gnu.org/licenses/>. #
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# #
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###############################################################################
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use strict;
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use Locale::Country;
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# enable only the following on debugging purpose
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use warnings;
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use CGI::Carp 'fatalsToBrowser';
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require '/var/ipfire/general-functions.pl';
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require "${General::swroot}/lang.pl";
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require "${General::swroot}/header.pl";
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#workaround to suppress a warning when a variable is used only once
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my @dummy = ( ${Header::colouryellow} );
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undef (@dummy);
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my $string=();
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my $memory=();
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my @memory=();
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my @pid=();
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my @guardian=();
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my %cgiparams=();
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# Path to the guardian.ignore file.
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my $ignorefile ='/var/ipfire/guardian/guardian.ignore';
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# Path to the guardian.target file.
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my $targetfile ='/var/ipfire/guardian/guardian.ignore';
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our %netsettings = ();
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&General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
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our %color = ();
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our %mainsettings = ();
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&General::readhash("${General::swroot}/main/settings", \%mainsettings);
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&General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
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our %settings = ();
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$settings{'GUARDIAN_ENABLED'} = 'off';
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$settings{'GUARDIAN_BLOCKINTERFACES'} ='default';
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$settings{'GUARDIAN_BLOCKTIME'} = '86400';
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$settings{'GUARDIAN_LOGFILE'} = '/var/log/guardian/guardian.log';
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$settings{'GUARDIAN_SNORT_ALERTFILE'} = '/var/log/snort/alert';
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$settings{'ACTION'} = '';
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my $errormessage = '';
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&Header::showhttpheaders();
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# Get GUI values.
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&Header::getcgihash(\%settings);
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&Header::getcgihash(\%cgiparams);
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## Perform input checks and save settings.
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#
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if ($settings{'ACTION'} eq $Lang::tr{'save'}) {
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# Check for valid blocktime.
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if ($settings{'GUARDIAN_BLOCKTIME'} ne '') {
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if (($settings{'GUARDIAN_BLOCKTIME'} !~ /^[0-9]+$/) || ($settings{'GUARDIAN_BLOCKTIME'} le '0')) {
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$errormessage = "$Lang::tr{'guardian invalid blocktime'}";
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}
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}
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# Check Logfile.
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if ($settings{'GUARDIAN_LOGFILE'} ne '') {
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if ($settings{'GUARDIAN_LOGFILE'} !~ /^[a-zA-Z0-9\.\/]+$/) {
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$errormessage = "$Lang::tr{'guardian invalid logfile'}";
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}
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}
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# Check input for snort alert file.
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if ($settings{'GUARDIAN_SNORT_ALERTFILE'} ne '') {
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if ($settings{'GUARDIAN_SNORT_ALERTFILE'} !~ /^[a-zA-Z0-9\.\/]+$/) {
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$errormessage = "$Lang::tr{'guardian invalid alertfile'}";
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}
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}
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# Only continue if no error message has been set.
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if ($errormessage eq '') {
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# Write configuration settings to file.
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&General::writehash("${General::swroot}/guardian/settings", \%settings);
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# Update configuration files.
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&BuildConfiguration();
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}
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## Add a new entry to the ignore file.
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#
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} elsif ($settings{'ACTION'} eq $Lang::tr{'add'}) {
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# Check if any input has been performed.
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if ($settings{'NEW_IGNORE_ENTRY'} ne '') {
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# Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
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if ((!&General::validip($settings{'NEW_IGNORE_ENTRY'})) && (!&General::validipandmask($settings{'NEW_IGNORE_ENTRY'}))) {
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$errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
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}
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} else {
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$errormessage = "$Lang::tr{'guardian empty input'}";
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}
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# Go further if there was no error.
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if ($errormessage eq '') {
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my $new_entry = $settings{'NEW_IGNORE_ENTRY'};
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# Open file for appending the new entry.
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open (FILE, ">>$ignorefile") or die "Unable to open $ignorefile for writing";
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# Write the new entry to the ignore file.
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print FILE "$new_entry\n";
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close(FILE);
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}
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## Remove entry from ignore list.
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#
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} elsif ($settings{'ACTION'} eq $Lang::tr{'remove'}) {
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my $id = 0;
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# Open ignorefile and read content.
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open(FILE, "<$ignorefile") or die "Unable to open $ignorefile.";
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my @current = <FILE>;
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close(FILE);
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# Re-open ignorefile for writing.
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open(FILE, ">$ignorefile") or die "Unable to open $ignorefile for writing";
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flock FILE, 2;
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# Read line by line from ignorefile and write them back except the line with the given ID.
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# So this line is missing in the new file and the entry has been deleted.
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foreach my $line (@current) {
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$id++;
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unless ($cgiparams{'ID'} eq $id) {
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print FILE "$line";
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}
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}
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close(FILE);
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## Block a user given address or subnet.
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#
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} elsif ($settings{'ACTION'} eq $Lang::tr{'block'}) {
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# Check if no empty input has been performed.
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if ($settings{'ADDRESS_BLOCK'} ne '') {
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# Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
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if ((!&General::validip($settings{'ADDRESS_BLOCK'})) && (!&General::validipandmask($settings{'ADDRESS_BLOCK'}))) {
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$errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
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}
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} else {
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$errormessage = "$Lang::tr{'guardian empty input'}";
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}
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# Go further if there was no error.
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if ($errormessage eq '') {
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my $block = $settings{'ADDRESS_BLOCK'};
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# Call helper to unblock address.
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system("/usr/local/bin/guardianctrl block $block &>/dev/null");
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}
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## Unblock address or subnet.
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#
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} elsif ($settings{'ACTION'} eq $Lang::tr{'unblock'}) {
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# Check if no empty input has been performed.
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if ($settings{'ADDRESS_UNBLOCK'} ne '') {
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# Check if the given input is no valid IP-address or IP-address with subnet, display an error message.
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if ((!&General::validip($settings{'ADDRESS_UNBLOCK'})) && (!&General::validipandmask($settings{'ADDRESS_UNBLOCK'}))) {
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$errormessage = "$Lang::tr{'guardian invalid address or subnet'}";
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}
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} else {
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$errormessage = "$Lang::tr{'guardian empty input'}";
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}
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# Go further if there was no error.
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if ($errormessage eq '') {
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my $unblock = $settings{'ADDRESS_UNBLOCK'};
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# Call helper to unblock address.
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system("/usr/local/bin/guardianctrl unblock $unblock &>/dev/null");
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}
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## Unblock all.
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#
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} elsif ($settings{'ACTION'} eq $Lang::tr{'unblock all'}) {
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# Call helper to flush iptables chain from guardian.
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system("/usr/local/bin/guardianctrl flush-chain &>/dev/null");
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} else {
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# Load settings from file.
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&General::readhash("${General::swroot}/guardian/settings", \%settings);
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}
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# Call functions to generate whole page.
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&showMainBox();
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&showIgnoreBox();
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# Display area only if guardian is running.
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if ( ($memory != 0) && (@pid[0] ne "///") ) {
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&showBlockedBox();
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}
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# Function to display the status of guardian and allow base configuration.
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sub showMainBox() {
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my %checked = ();
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$checked{'GUARDIAN_ENABLED'}{'on'} = '';
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$checked{'GUARDIAN_ENABLED'}{'off'} = '';
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$checked{'GUARDIAN_ENABLED'}{$settings{'GUARDIAN_ENABLED'}} = 'checked';
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$checked{'GUARDIAN_BLOCKINTERFACES'}{'default'} = '';
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$checked{'GUARDIAN_BLOCKINTERFACES'}{'all'} = '';
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$checked{'GUARDIAN_BLOCKINTERFACES'}{$settings{'GUARDIAN_BLOCKINTERFACES'}} = "checked='checked'";
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&Header::openpage($Lang::tr{'guardian configuration'}, 1, '');
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&Header::openbigbox('100%', 'left', '', $errormessage);
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# Print errormessage if there is one.
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if ($errormessage) {
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&Header::openbox('100%', 'left', $Lang::tr{'error messages'});
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print "<font class='base'>$errormessage </font>\n";
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&Header::closebox();
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}
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# Draw current guardian state.
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&Header::openbox('100%', 'center', $Lang::tr{'guardian'});
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# Check if guardian is running and grab some stats.
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&daemonstats();
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# Display some useful information related to guardian, if daemon is running.
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if ( ($memory != 0) && (@pid[0] ne "///") ){
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print <<END;
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<table width='95%' cellspacing='0' class='tbl'>
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<tr>
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<th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
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</tr>
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<tr>
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<td class='base'>$Lang::tr{'guardian daemon'}</td>
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<td align='center' colspan='2' width='75%' bgcolor='${Header::colourgreen}'><font color='white'><strong>$Lang::tr{'running'}</strong></font></td>
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</tr>
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<tr>
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<td class='base'></td>
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<td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
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<td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
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</tr>
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<tr>
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<td class='base'></td>
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<td bgcolor='$color{'color22'}' align='center'>@pid[0]</td>
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<td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
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</tr>
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</table>
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END
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} else {
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# Otherwise display a hint that the service is not launched.
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print <<END;
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<table width='95%' cellspacing='0' class='tbl'>
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<tr>
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<th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'guardian service'}</strong></th>
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</tr>
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<tr>
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<td class='base'>$Lang::tr{'guardian daemon'}</td>
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<td align='center' width='75%' bgcolor='${Header::colourred}'><font color='white'><strong>$Lang::tr{'stopped'}</strong></font></td>
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</tr>
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</table>
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END
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}
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&Header::closebox();
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# Draw elements for guardian configuration.
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&Header::openbox('100%', 'center', $Lang::tr{'guardian configuration'});
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print <<END;
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<form method='post' action='$ENV{'SCRIPT_NAME'}'>
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<table width='95%'>
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<tr>
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<td colspan='5' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian common settings'}</b></td>
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</tr>
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<tr>
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<td width='20%' class='base'>$Lang::tr{'guardian enabled'}:</td>
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<td width='30%'><input type='checkbox' name='GUARDIAN_ENABLED' $checked{'GUARDIAN_ENABLED'}{'on'} /></td>
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<td width='20%' class='base'>$Lang::tr{'guardian blockinterfaces'}:</td>
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<td width='15%'> $Lang::tr{'guardian blockinterfaces default'}
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<input type='radio' name='GUARDIAN_BLOCKINTERFACES' value='default' $checked{'GUARDIAN_BLOCKINTERFACES'}{'default'} /></td>
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<td width='15%'> $Lang::tr{'guardian blockinterfaces all'}
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<input type='radio' name='GUARDIAN_BLOCKINTERFACES' value='all' $checked{'GUARDIAN_BLOCKINTERFACES'}{'all'} /></td>
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</tr>
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<tr>
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<td width='20%' class='base'>$Lang::tr{'guardian blocktime'}:</td>
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<td colspan='5'><input type='text' name='GUARDIAN_BLOCKTIME' value='$settings{'GUARDIAN_BLOCKTIME'}' size='10' /></td>
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</tr>
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<tr>
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<td width='20%' class='base'>$Lang::tr{'guardian logfile'}:</td>
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<td colspan='5'><input type='text' name='GUARDIAN_LOGFILE' value='$settings{'GUARDIAN_LOGFILE'}' size='30' /></td>
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</tr>
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<tr>
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<td width='20%' class='base'>$Lang::tr{'guardian snort alertfile'}:</td>
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<td colspan='5'><input type='text' name='GUARDIAN_SNORT_ALERTFILE' value='$settings{'GUARDIAN_SNORT_ALERTFILE'}' size='30' /></td>
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</tr>
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</table>
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END
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print <<END;
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<hr>
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<table width='95%'>
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<tr>
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<td> </td>
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<td align='center'><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
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<td> </td>
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</tr>
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</table>
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</form>
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END
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&Header::closebox();
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}
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# Function to show elements of the guardian ignorefile and allow to add or remove single members of it.
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sub showIgnoreBox() {
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&Header::openbox('100%', 'center', $Lang::tr{'guardian ignored hosts'});
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print <<END;
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<table width='60%'>
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<tr>
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<td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian ignored hosts'}</b></td>
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</tr>
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END
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# Check if the guardian ignore file contains any content.
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if (-s $ignorefile) {
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# Open file and print contents.
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open FILE, $ignorefile or die "Could not open $ignorefile";
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my $id = 0;
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my $col = "";
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# Read file line by line and print out the elements.
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while( my $ignored_element = <FILE> ) {
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# Increase id number for each element in the ignore file.
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$id++;
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# Check if the id number is even or not.
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if ($id % 2) {
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$col="bgcolor='$color{'color22'}'";
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} else {
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$col="bgcolor='$color{'color20'}'";
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}
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print <<END;
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<tr>
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<td width='80%' class='base' $col>$ignored_element</td>
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<td width='20%' align='center' $col>
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<form method='post' name='frma$id' action='$ENV{'SCRIPT_NAME'}'>
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<input type='image' name='$Lang::tr{'remove'}' src='/images/delete.gif' title='$Lang::tr{'remove'}' alt='$Lang::tr{'remove'}'>
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<input type='hidden' name='ID' value='$id'>
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<input type='hidden' name='ACTION' value='$Lang::tr{'remove'}'>
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</form>
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</td>
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</tr>
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END
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}
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close (FILE);
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} else {
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# Print notice that currently no elements are stored in the ignore file.
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print "<tr>\n";
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print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
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print "</tr>\n";
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}
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print "</table>\n";
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&Header::closebox();
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# Section to add new elements to the ignore list.
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print <<END;
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<div class='post' align='center'>
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<table width='60%'>
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<form method='post' action='$ENV{'SCRIPT_NAME'}'>
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<tr>
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<td width='30%'>$Lang::tr{'dnsforward add a new entry'}: </td>
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<td width='50%'><input type='text' name='NEW_IGNORE_ENTRY' value='' size='24' /></td>
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<td align='center' width='20%'><input type='submit' name='ACTION' value='$Lang::tr{'add'}' /></td>
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</tr>
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</form>
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</table>
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</div>
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END
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}
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# Function to list currently bocked addresses from guardian and unblock them or add custom entries to block.
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sub showBlockedBox() {
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&Header::openbox('100%', 'center', $Lang::tr{'guardian blocked hosts'});
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# Lauch helper to get chains from iptables.
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open(FILE, "/usr/local/bin/guardianctrl get-chain |");
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print <<END;
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<table width='60%'>
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<tr>
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<td colspan='2' class='base' bgcolor='$color{'color20'}'><b>$Lang::tr{'guardian blocked hosts'}</b></td>
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</tr>
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END
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my $id = 0;
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my $address = "";
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my $col = "";
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my $interface = "";
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# Read file line by line and print out the elements.
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foreach my $line (<FILE>) {
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# Skip descriptive lines.
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next if ($line =~ /^Chain/);
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next if ($line =~ /^ pkts/);
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# Generate array based on the line content (seperator is a single or multiple space's)
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my @comps = split(/\s{1,}/, $line);
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my ($lead, $pkts, $bytes, $target, $prot, $opt, $in, $out, $source, $destination) = @comps;
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# Assign different variable names.
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my $blocked_host = $source;
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# Increase id number for each element in the ignore file.
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$id++;
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# Check if the id number is even or not.
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if ($id % 2) {
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$col="bgcolor='$color{'color22'}'";
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} else {
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$col="bgcolor='$color{'color20'}'";
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}
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print <<END;
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<tr>
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<td width='80%' class='base' $col>$blocked_host</td>
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<td width='20%' align='center' $col>
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<form method='post' name='frmb$id' action='$ENV{'SCRIPT_NAME'}'>
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<input type='image' name='$Lang::tr{'unblock'}' src='/images/delete.gif' title='$Lang::tr{'unblock'}' alt='$Lang::tr{'unblock'}'>
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<input type='hidden' name='ADDRESS_UNBLOCK' value='$blocked_host'>
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<input type='hidden' name='ACTION' value='$Lang::tr{'unblock'}'>
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</form>
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</td>
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</tr>
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END
|
|
}
|
|
|
|
close (FILE);
|
|
|
|
# If the loop only has been runs once the id still is "0", which means there are no
|
|
# additional entries (blocked hosts) in the iptables chain.
|
|
if ($id == 0) {
|
|
|
|
# Print notice that currently no hosts are blocked.
|
|
print "<tr>\n";
|
|
print "<td class='base' colspan='2'>$Lang::tr{'guardian no entries'}</td>\n";
|
|
print "</tr>\n";
|
|
}
|
|
|
|
print "</table>\n";
|
|
|
|
&Header::closebox();
|
|
|
|
# Section for a manual block of an IP-address.
|
|
print <<END;
|
|
<div class='post' align='center'>
|
|
<table width='60%'>
|
|
<form method='post' action='$ENV{'SCRIPT_NAME'}'>
|
|
<tr>
|
|
<td width='30%'>$Lang::tr{'guardian block a host'}: </td>
|
|
<td width='40%'><input type='text' name='ADDRESS_BLOCK' value='' size='24' /></td>
|
|
<td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'block'}'></td>
|
|
<td align='center' width='15%'><input type='submit' name='ACTION' value='$Lang::tr{'unblock all'}'></td>
|
|
</tr>
|
|
</form>
|
|
</table>
|
|
</div>
|
|
END
|
|
}
|
|
|
|
&Header::closebigbox();
|
|
&Header::closepage();
|
|
|
|
# Function to check if guardian has been started.
|
|
# Grab process id and consumed memory if the daemon is running.
|
|
sub daemonstats() {
|
|
$memory = 0;
|
|
# for pid and memory
|
|
open(FILE, '/usr/local/bin/addonctrl guardian status | ');
|
|
@guardian = <FILE>;
|
|
close(FILE);
|
|
$string = join("", @guardian);
|
|
$string =~ s/[a-z_]//gi;
|
|
$string =~ s/\[[0-1]\;[0-9]+//gi;
|
|
$string =~ s/[\(\)\.]//gi;
|
|
$string =~ s/ //gi;
|
|
$string =~ s/\e//gi;
|
|
@pid = split(/\s/,$string);
|
|
if (open(FILE, "/proc/$pid[0]/statm")){
|
|
my $temp = <FILE>;
|
|
@memory = split(/ /,$temp);
|
|
close(FILE);
|
|
}
|
|
$memory+=$memory[0];
|
|
}
|
|
|
|
sub BuildConfiguration() {
|
|
my %settings = ();
|
|
&General::readhash("${General::swroot}/guardian/settings", \%settings);
|
|
|
|
my $configfile = "${General::swroot}/guardian/guardian.conf";
|
|
|
|
open(FILE, ">$configfile");
|
|
|
|
print FILE "Interface red0\n";
|
|
print FILE "BlockOption $settings{'GUARDIAN_BLOCKINTERFACES'}\n";
|
|
print FILE "HostGatewayByte 1\n";
|
|
print FILE "LogFile $settings{'GUARDIAN_LOGFILE'}\n";
|
|
print FILE "AlertFile $settings{'GUARDIAN_SNORT_ALERTFILE'}\n";
|
|
print FILE "IgnoreFile $ignorefile\n";
|
|
print FILE "TargetFile $targetfile\n";
|
|
print FILE "TimeLimit $settings{'GUARDIAN_BLOCKTIME'}\n";
|
|
|
|
close(FILE);
|
|
|
|
# Restart the service.
|
|
if ($settings{'GUARDIAN_ENABLED'} eq 'on') {
|
|
system("/usr/local/bin/guardianctrl restart &>/dev/null");
|
|
} else {
|
|
system("/usr/local/bin/guardianctrl stop &>/dev/null");
|
|
}
|
|
}
|