/
Firewall.class.php
2477 lines (2217 loc) · 74.9 KB
/
Firewall.class.php
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<?php
// vim: set ai ts=4 sw=4 ft=php:
namespace FreePBX\modules;
include __DIR__."/vendor/autoload.php";
class Firewall extends \FreePBX_Helpers implements \BMO {
private $network='';
private $zones='';
private static $firewalls;
public function __construct($freepbx = null) {
if ($freepbx == null)
throw new \Exception("Not given a FreePBX Object");
$this->FreePBX = $freepbx;
$this->db = $freepbx->Database;
$this->astman = $this->FreePBX->astman;
$this->astspooldir = $this->FreePBX->Config->get("ASTSPOOLDIR");
$this->astetcdir = $this->FreePBX->Config->get("ASTETCDIR");
$this->astlogdir = $this->FreePBX->Config->get("ASTLOGDIR");
$this->webuser = $this->FreePBX->Config->get('AMPASTERISKWEBUSER');
$this->webgroup = $this->FreePBX->Config->get("AMPASTERISKWEBGROUP");
}
/**
* setServices
*
* @param mixed $servicesObj
* @return void
*/
public function setServices($servicesObj){
self::$services = $servicesObj;
}
/**
* services
*
* @return void
*/
public function services() {
if (!self::$services) {
include 'Services.class.php';
self::$services = new Firewall\Services();
}
return self::$services;
}
public function setNetwork($networkObj){
$this->network = $networkObj;
}
public function network() {
if (!$this->network) {
include 'Network.class.php';
$this->network = new Firewall\Network();
}
return $this->network;
}
public function setZones($zoneObj){
$this->zones = $zoneObj;
}
public function zones() {
if (!$this->zones) {
include 'Zones.class.php';
$this->zones = new Firewall\Zones();
}
return $this->zones;
}
public function getTrustedZone($from){
$networkmaps = $this->FreePBX->Firewall->get_networkmaps();
$trusted = "";
foreach($networkmaps as $ip => $type){
if($type == $from){
$trusted .= (string) "$ip\n";
}
}
return $trusted;
}
/**
* setFirewall
*
* @param mixed $firewallObj
* @return void
*/
public function setFirewall($firewallObj){
self::$firewalls = $firewallObj;
}
/**
* firewall
*
* @return void
*/
public function getFirewall() {
if (!self::$firewalls) {
self::$firewalls = $this->FreePBX->Firewall;
}
return self::$firewalls;
}
public function intrusion_detection_status() {
exec('pgrep -f fail2ban-server', $out, $ret);
if ($ret == 0) {
return "running";
} else {
return "stopped";
}
}
public function getExtRegistered(){
/**
* Get all IP addresses of registered extensions.
* Whatever technololgies, SIP, PJSIP, IAX2
*/
$ip_reg = array();
$sip_driver = $this->astman->Command("sip show peers");
$pjsip_driver = $this->astman->Command("pjsip show endpoints");
$iax_driver = $this->astman->Command("iax2 show peers");
$sip_driver = (is_array($sip_driver)) && !empty($sip_driver["data"]) ? explode("\n",$sip_driver["data"]) : array();
$pjsip_driver = (is_array($pjsip_driver)) && !empty($pjsip_driver["data"]) ? explode("\n",$pjsip_driver["data"]) : array();
$iax_driver = (is_array($iax_driver)) && !empty($iax_driver["data"]) ? explode("\n",$iax_driver["data"]) : array();
foreach($sip_driver as $line => $content){
if (preg_match('/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/', $content, $ip_match) && strpos($content,"OK") !== false) {
$ip_reg[] = $ip_match[0];
}
}
foreach($pjsip_driver as $line => $content){
if (preg_match('/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/', $content, $ip_match) && strpos($content,"Avail") !== false) {
$ip_reg[] = $ip_match[0];
}
}
foreach($iax_driver as $line => $content){
if (preg_match('/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/', $content, $ip_match) && strpos($content,"OK") !== false) {
$ip_reg[] = $ip_match[0];
}
}
return implode("\n", array_unique($ip_reg));
}
public function get_astspooldir() {
return $this->astspooldir;
}
public function get_astetcdir() {
return $this->astetcdir;
}
public function get_astlogdir() {
return $this->astlogdir;
}
public static $dbDefaults = array("status" => false);
public static $filesCustomRules = array('ipv4' => '/etc/firewall-4.rules', 'ipv6' => '/etc/firewall-6.rules');
public static $filesLog = Null;
public static function logfile_init() {
$astlogdir = \FreePBX::Config()->get("ASTLOGDIR");
self::$filesLog = array('err' => $astlogdir.'/firewall.err', 'out' => $astlogdir.'/firewall.log');
}
private static $services = false;
public function install() {
// Upgrade at 13.0.47 - If the firewall is enabled, create the filesystem
// flag to say that it is.
if ($this->getConfig("status")) {
$file = "/etc/asterisk/firewall.enabled";
if (!file_exists($file)) {
touch($file);
chown($file, $this->webuser);
chgrp($file, $this->webgroup);
}
}
$this->setConfig("syncing", "no");
// 13.0.54 - Add cronjob to restart it if it crashes
$this->addCronJob();
$this->removeOldSyncJob();
$nt = \FreePBX::Notifications();
$nt->add_warning("firewall", "1", _("Intrusion detection handling method"), _("Intrusion detection handling method is been updated recently. Please clear your browser cache and try if you are having issue with Intrusion Detection Start/Restart/Stop button.") , "", $reset=true, $candelete=true);
}
public function uninstall() {
// Disable the firewall when it's uninstalled,
// so if it is automatically reinstalled at some
// point, it doesn't start.
$this->setConfig("status", false);
@unlink("/etc/asterisk/firewall.enabled");
$o = \FreePBX::OOBE()->getConfig("completed");
if (is_array($o)) {
unset ($o['firewall']);
\FreePBX::OOBE()->setConfig("completed", $o);
$this->setConfig("oobeanswered", array());
}
$this->removeCronJob();
// Run hook uninstall, actions with special root permissions.
$this->uninstallHook();
}
public function get_networkmaps(){
return $this->getConfig("networkmaps");
}
public function backup() {}
public function restore($backup) {}
public function chownFreepbx() {
$this->fix_custom_rules_files();
$files = array(
array('type' => 'execdir',
'path' => __DIR__."/hooks",
'perms' => 0755),
array('type' => 'execdir',
'path' => __DIR__."/bin",
'perms' => 0755),
array('type' => 'execdir',
'path' => __DIR__."/phar",
'perms' => 0755)
);
return $files;
}
public function read_file($file, &$data) {
$data_return = false;
if (! empty($file)) {
if ( ( file_exists($file) ) && ( is_readable($file) ) ) {
if($fh = fopen($file,"r"))
{
while (($bufer = fgets($fh, 4096)) !== false) {
$data[] = $bufer;
}
fclose($fh);
$data_return = true;
}
}
}
return $data_return;
}
// INI - Advanced Custom Rules
public function check_protocol_custom_rules($protocolType=Null, $allow_empty=True) {
$data_return = true;
if ( ( empty($protocolType) ) && ( ! $allow_empty ) ) {
$data_return = false;
} else if ( ! empty($protocolType)) {
$data_return = array_key_exists($protocolType, self::$filesCustomRules);
}
return $data_return;
}
public function is_exist_custom_rules_files($protocolType=Null) {
$data_return = $this->check_protocol_custom_rules($protocolType);
if ($data_return) {
foreach (self::$filesCustomRules as $type => $file) {
if ( ( ! empty($protocolType) ) && ( strtolower($type) != strtolower($protocolType) ) ) {
continue;
}
if (! file_exists($file)) {
$data_return = false;
}
}
}
return $data_return;
}
public function is_good_owner_perms_custom_rules_files($protocolType=Null) {
$data_return = $this->check_protocol_custom_rules($protocolType);
if ($data_return) {
foreach (self::$filesCustomRules as $type => $file) {
if ( ( ! empty($protocolType) ) && ( strtolower($type) != strtolower($protocolType) ) ) {
continue;
}
if (! file_exists($file)) {
$data_return = false;
} else {
$owner_file = fileowner($file);
$perms_file = fileperms($file);
/*
* chown > 0 = root
* chmod > 33206 = 0666 (-rw-rw-rw-)
*/
if ( ( $owner_file != 0 ) || ( $perms_file != 33206 ) ) {
$data_return = false;
}
}
}
}
return $data_return;
}
public function read_file_custom_rules($protocolType=Null) {
$data_return = array();
if ( ( $this->check_protocol_custom_rules($protocolType, False) ) && ( $this->is_exist_custom_rules_files($protocolType) ) ) {
$file = self::$filesCustomRules[strtolower($protocolType)];
$this->read_file($file, $data_return);
}
return $data_return;
}
public function save_file_custom_rules($protocolType=Null, $data = "") {
$data_return = false;
if ( ( $this->check_protocol_custom_rules($protocolType, False) ) && ( $this->is_exist_custom_rules_files($protocolType) ) ) {
$file = self::$filesCustomRules[strtolower($protocolType)];
if (is_writable($file)) {
if($fh = fopen($file,"w"))
{
if (fwrite($fh, $data) !== FALSE) {
$data_return = true;
}
fclose($fh);
}
}
}
return $data_return;
}
public function check_custom_rules_files($protocolType=Null) {
if ( (! $this->is_exist_custom_rules_files($protocolType) ) || (! $this->is_good_owner_perms_custom_rules_files($protocolType) ) ) {
return false;
}
return true;
}
public function fix_custom_rules_files(&$log=Null) {
$detect_error = false;
foreach (self::$filesCustomRules as $file) {
$output[] = "<info>".sprintf(_("Check file '%s'"), $file)."</info>";
if (! file_exists($file)) {
$new_file = @fopen($file,"w+");
if($new_file == false) {
$errors= error_get_last();
freepbx_log(FPBX_LOG_ERROR, sprintf(_("Module Firewall - Check Rules - File '%s' not exist, error creating. Error Message: %s"), $file, $errors['message']));
$output[] = "<error>".sprintf(_("- Does not exist, creating file... ERROR!!\n >> Error Message: %s"), $errors['message'])."</error>";
continue;
} else {
freepbx_log(FPBX_LOG_INFO, sprintf(_("Module Firewall - Check Rules - File '%s' not exist, created OK!"), $file));
$output[] = "<info>"._("- Does not exist, creating file... OK!")."</info>";
}
fclose($new_file);
} else {
freepbx_log(FPBX_LOG_INFO, sprintf(_("Module Firewall - Check Rules - File '%s' exist... OK!"), $file));
}
$err_chmod = NULL;
$err_chown = NULL;
if (! @chmod($file, 0666)) {
$err_chmod = error_get_last();
}
if (! @chown($file, "root")) {
$err_chown = error_get_last();
}
if ((is_null($err_chmod)) && (is_null($err_chown))) {
freepbx_log(FPBX_LOG_INFO, sprintf(_("Module Firewall - Check Rules - Adjusting owner and permissions in file '%s'... OK!"), $file));
$output[] = "<info>"._("- Adjusting owner and permissions... OK!")."</info>";
}
if (! is_null($err_chmod)) {
$detect_error = true;
freepbx_log(FPBX_LOG_ERROR, sprintf(_("Module Firewall - Check Rules - Error adjusting permissions in file '%s'. Error Message: %s"), $file, $err_chmod['message']) );
$output[] = "<error>".sprintf(_("- Adjusting permissions... ERROR!\n >> Error Message: %s"), $err_chmod['message'])."</error>";
}
if (! is_null($err_chown)) {
$detect_error = true;
freepbx_log(FPBX_LOG_ERROR, sprintf(_("Module Firewall - Check Rules - Error adjusting owner in file '%s'. Error Message: %s"), $file, $err_chown['message']) );
$output[] = "<error>".sprintf(_("- Adjusting owner... ERROR!\n >> Error Message: %s"), $err_chown['message'])."</error>";
}
}
if (! is_null($log) ) {
if ( is_array($log) ) {
$log = array_merge($log, $output);
}
elseif (! empty($log) ) {
$log = array_merge(array($log), $output);
}
else {
$log = $output;
}
}
return !$detect_error;
}
public function read_file_custom_rules_ajax($protocolType) {
$data_return = array();
$data_return['status'] = false;
$data_return['protocol'] = "";
if ( isset($protocolType) ) {
$data_return['protocol'] = $protocolType;
if ($this->check_protocol_custom_rules($protocolType, False)) {
$data_return['status'] = true;
$data_return['data'] = $this->read_file_custom_rules($protocolType);
} else {
$data_return['code'] = 2;
$data_return['message'] = _("Protocol not valid!");
}
} else {
$data_return['code'] = 1;
$data_return['message'] = _("Protocol not selected!");
}
return $data_return;
}
public function save_file_custom_rules_ajax($protocolType, $data) {
$data_return = array();
$data_return['status'] = false;
$data_return['protocol'] = "";
if ( isset($protocolType) ) {
$data_return['protocol'] = $protocolType;
if ($this->check_protocol_custom_rules($protocolType, False)) {
if ( isset($data) ) {
if ( $this->save_file_custom_rules($protocolType, $data) ) {
$data_return['status'] = true;
} else {
$data_return['code'] = 4;
$data_return['message'] = _("Error saving data!");
}
}
else {
$data_return['code'] = 3;
$data_return['message'] = _("New rules unsent!");
}
} else {
$data_return['code'] = 2;
$data_return['message'] = _("Protocol not valid!");
}
} else {
$data_return['code'] = 1;
$data_return['message'] = _("Protocol not selected!");
}
return $data_return;
}
public function remove_custom_rules_files() {
$detect_error = false;
foreach (self::$filesCustomRules as $file) {
$err_unlink = null;
if (file_exists($file)) {
if (! @unlink($file)) {
$err_unlink = error_get_last();
freepbx_log(FPBX_LOG_ERROR, sprintf(_("Module Firewall - Remove File Rules - Error detected by deleting the file '%s'!. Error Message: %s"), $file, $err_chmod['message']));
$detect_error = true;
} else {
freepbx_log(FPBX_LOG_INFO, sprintf(_("Module Firewall - Remove File Rules - File '%s' deleted successfully."), $file));
}
}
}
return !$detect_error;
}
// END - Advanced Custom Rules
public function oobeHook() {
include __DIR__.'/OOBE.class.php';
$o = new Firewall\OOBE($this);
return $o->oobeRequest();
}
public function dashboardService() {
// Check to see if Firewall is enabled. Warn if it's not.
$status = array(
'title' => _("System Firewall"),
'order' => 3,
);
if ($this->getConfig("status")) {
$status = array_merge($status, $this->Dashboard()->genStatusIcon('ok', _("Firewall Active")));
} else {
$status = array_merge($status, $this->Dashboard()->genStatusIcon('error', _("Firewall Disabled")));
return array($status);
}
if ($this->isNotReady()) {
$status = array_merge($status, $this->Dashboard()->genStatusIcon('warning', _("Starting up")));
return array($status);
}
// Clobber the $status if it's not running
// We're meant to be running, check that the firewall service is running.
if (! $this->isRunning()) {
$status = array_merge($status, $this->Dashboard()->genStatusIcon('error', _("Firewall Service not running!")));
$status['order'] = 1;
}
// If there are any interfaces that are in 'Trusted', yell loudly about that, too
$trusted = array(
'title' => _("Firewall Configuration"),
'order' => 3
);
$foundtrustedint = false;
$foundnewint = false;
$error = false;
$ints = $this->getInterfaces();
foreach ($ints as $i => $conf) {
// Is it an alias? If so, ignore it, we can't set it anyway
if ($conf['config']['PARENT']) {
continue;
}
// Does this not have a zone?
if (!isset($conf['config']['ZONE'])) {
// If it's got IP addresses, it's new. Otherwise, we can just ignore it.
if ($conf['addresses']) {
$foundnewint = $i;
}
break;
}
$runningzone = $this->getZone($i);
if ($conf['config']['ZONE'] !== $runningzone) {
$error = $i;
break;
} elseif ($runningzone === "trusted") {
$foundtrustedint = $i;
break;
}
}
if ($error) {
$trusted = array_merge($trusted, $this->Dashboard()->genStatusIcon('error', _("Firewall Integrity Failed")));
$this->Notifications()->add_critical('firewall', 'zoneerror', _("Firewall Integrity Failed"),
sprintf(_("Interface %s is not in the correct zone. This can be caused by manual alterations of iptables, or, an unexpected error. Please restart the firewall service."), $error),
"?display=firewall",
true, // Reset on update.
true); // Can delete
return array($status, $trusted);
}
// No errors found. Remove zone errors, if there are any
$this->Notifications()->delete('firewall', 'zoneerror');
if ($foundnewint) { // Have we found a new interface?
$trusted = array_merge($trusted, $this->Dashboard()->genStatusIcon('error', _("New Interface Detected")));
$trusted['order'] = 1;
$this->Notifications()->add_critical('firewall', 'newint', _("New Interface Detected"),
sprintf(_("A new, unconfigured, network interface has been detected. Please assign interface '%s' to a zone."), $foundnewint),
"?display=firewall&page=about&tab=interfaces",
true, // Reset on update.
false); // Can delete
return array($status, $trusted);
} elseif ($foundtrustedint) { // If we've found a trusted interface, this is bad, yell.
$trusted = array_merge($trusted, $this->Dashboard()->genStatusIcon('error', _("Trusted Interface Detected")));
$trusted['order'] = 1;
// Add core notification
$this->Notifications()->add_critical('firewall', 'trustedint', _("Trusted Interface Detected"),
sprintf(_("A network interface that is assigned to the 'Trusted' zone has been detected. This is a misconfiguration. To ensure your system is protected from attacks, please change the default zone of interface '%s'."), $foundtrustedint),
"?display=firewall&page=about&tab=interfaces",
true, // Reset on update.
false); // Can delete
return array($status, $trusted);
} else {
// No errors with interfaces, so delete any old notifications
$this->Notifications()->delete('firewall', 'newint');
$this->Notifications()->delete('firewall', 'trustedint');
}
// Now we need to validate that we DO have a trusted network or host.
// If we dont', this should be a warning, not an error.
$nets = $this->getConfig("networkmaps");
if (!is_array($nets)) {
$nets = array();
}
$foundtrustednet = false;
foreach ($nets as $name => $zone) {
if ($zone === "trusted") {
$foundtrustednet = true;
break;
}
}
if ($foundtrustednet) {
// Yup, there's at least one!
$trusted = array_merge($trusted, $this->Dashboard()->genStatusIcon('ok', _("Trusted Management Network defined")));
} else {
$trusted = array_merge($trusted, $this->Dashboard()->genStatusIcon('warning', _("No Trusted Management Network")));
// Add core notification
$this->Notifications()->add_warning('firewall', 'trustednet', _("No Trusted Network or Host defined"),
_("No Trusted Network or Host has been defined. Every server should have a 'Trusted' host or network to ensure that in case of configuration error, the machine is still accessible."),
"?display=firewall&page=about&tab=networks",
true, // Reset on update.
true); // Can delete
}
return array($status, $trusted);
}
// Run a sysadmin-managed root hook.
public function runHook($hookname,$params = false) {
// Runs a new style Syadmin hook
if (!file_exists("/etc/incron.d/sysadmin")) {
throw new \Exception("Sysadmin RPM not up to date, or not a known OS. Can not start System Firewall. See http://bit.ly/fpbxfirewall");
}
$basedir = $this->get_astspooldir()."/incron";
if (!is_dir($basedir)) {
throw new \Exception("$basedir is not a directory");
}
// Does our hook actually exist?
if (!file_exists(__DIR__."/hooks/$hookname")) {
throw new \Exception("Hook $hookname doesn't exist");
}
// So this is the hook I want to run
$filename = "$basedir/firewall.$hookname";
// If we have a modern sysadmin_rpm, we can put the params
// INSIDE the hook file, rather than as part of the filename
if (file_exists("/etc/sysadmin_contents_max")) {
$fh = fopen("/etc/sysadmin_contents_max", "r");
if ($fh) {
$max = (int) fgets($fh);
fclose($fh);
}
} else {
$max = false;
}
if ($max > 65535 || $max < 128) {
$max = false;
}
// Do I have any params?
$contents = "";
if ($params) {
// Oh. I do. If it's an array, json encode and base64
if (is_array($params)) {
$b = base64_encode(gzcompress(json_encode($params)));
// Note we derp the base64, changing / to _, because this may be used as a filepath.
if ($max) {
if (strlen($b) > $max) {
throw new \Exception("Contents too big for current sysadmin-rpm. This is possibly a bug!");
}
$contents = $b;
$filename .= ".CONTENTS";
} else {
$filename .= ".".str_replace('/', '_', $b);
if (strlen($filename) > 200) {
throw new \Exception("Too much data, and old sysadmin rpm. Please run 'yum update'");
}
}
} elseif (is_object($params)) {
throw new \Exception("Can't pass objects to hooks");
} else {
// Cast it to a string if it's anything else, and then make sure
// it doesn't have any spaces.
$filename .= ".".preg_replace("/[[:blank:]]+/", "", (string) $params);
}
}
$fh = fopen($filename, "w+");
if ($fh === false) {
// WTF, unable to create file?
throw new \Exception("Unable to create hook trigger '$filename'");
}
// Put our contents there, if there are any.
fwrite($fh, $contents);
// As soon as we close it, incron does its thing.
fclose($fh);
// Wait for up to 10 seconds and make sure it's been deleted.
$maxloops = 20;
$deleted = false;
while ($maxloops--) {
if (!file_exists($filename)) {
$deleted = true;
break;
}
usleep(500000);
}
if (!$deleted) {
throw new \Exception("Hook file '$filename' was not picked up by Incron after 10 seconds. Is it not running?");
}
return true;
}
public function startFirewall() {
$this->runHook("firewall");
}
public function stopFirewall() {
$this->runHook("stopfirewall");
}
public function fixCustomRules($tiemout = 0) {
$this->runHook("fixcustomrules");
if ($tiemout > 0) {
$completed = false;
while ( $i <= $timeout ) {
$completed = $this->check_custom_rules_files();
if ( $completed ) { break; }
$i++;
sleep(1);
}
return $completed;
}
}
public function enableLeRules() {
// use sysadmin LetsEncrypt service port if defined
// else, we don't know which http service, so open all http
$as = $this->getAdvancedSettings();
if ($as['lefilter'] == "disabled") {
return true;
}
$leports = array();
$leservice = $this->getService('letsencrypt');
if (isset($leservice['fw'][0]['port'])) {
$leports[] = $leservice['fw'][0]['port'];
} else {
$allservices = $this->getServices();
unset($allservices['custom']); // ignore custom services
foreach ($allservices as $services) {
foreach($services as $service) {
$s = $this->getService($service);
if (!$s['disabled']) {
foreach ($s['fw'] as $fw) {
if ($fw['leport']) {
$leports[] = $fw['port'];
}
}
}
}
}
}
return $this->runHook("updateipset", array('ipset' => 'lefilter', 'action' => 'add', 'ports' => $leports));
}
public function disableLeRules() {
$as = $this->getAdvancedSettings();
if ($as['lefilter'] == "disabled") {
return true;
}
return $this->runHook("updateipset", array('ipset' => 'lefilter', 'action' => 'flush'));
}
public function uninstallHook() {
$this->runHook("uninstall");
}
public function isEnabled() {
return $this->getConfig("status");
}
// If the machine is currently in safe mode, return true.
public function isNotReady() {
return file_exists("/var/run/firewalld.safemode");
}
// If the firewall service is running, it returns true.
public function isRunning() {
exec("pgrep -f hooks/voipfirewalld", $out, $ret);
return $ret == 0 ? true : false;
}
public function showLockoutWarning() {
if (!$this->isTrusted()) {
$thishost = $this->detectHost();
print "<div class='alert alert-warning' id='lockoutwarning'>";
print "<p>".sprintf(_("The client machine you are using to manage this server (<tt>%s</tt>) is <strong>not</strong> a member of the Trusted zone. It is highly recommended to add this client to your Trusted Zone to avoid accidental lockouts."), $thishost)."</p>";
print "<p><a href='?display=firewall&page=advanced&tab=shortcuts'>"._("You can add the host automatically here.")."</a></p>";
print "</div>";
}
}
public function showDisabled() {
// Firewall functions disabled
return load_view(__DIR__."/views/disabled.php", array("fw" => $this));
}
public function getRightNav($page) {
return load_view(__DIR__."/views/bootnav.php", array("fw" => $this, "thispage" => $page));
}
public function sysadmin_info(){
$module = \module_functions::create();
$result = $module->getinfo('sysadmin', MODULE_STATUS_ENABLED);
return (empty($result["sysadmin"])) ? '' : $result;
}
/**
* showIDPage for Sysadmin menu
* This page is displayed only if Firewall is disabled.
*
*
* @return string
*/
public function showIDPage(){
return __DIR__."/views/intrusion_detection.php";
}
/**
* getIDDataPage : Prepare everything for I.D page
* This page is shared with Firewall and Sysadmin module.
* The common data are there.
*
* @return array
*/
public function getIDDataPage(){
$asfw = $this->getAdvancedSettings();
$indetec = $this->FreePBX->Sysadmin->getIntrusionDetection();
$indetec["idregextip"] = $this->getConfig("idregextip") == "true" ? "Active" : "";
$indetec["trusted"] = $this->getConfig("trusted") == "true" ? "Active" : "";
$indetec["local"] = $this->getConfig("local") == "true" ? "Active" : "";
$indetec["other"] = $this->getConfig("other") == "true" ? "Active" : "";
$indetec["idstatus"] = $indetec["status"] == "stopped"? "style='display: none;'": "";
$indetec["legacy"] = $asfw["id_sync_fw"] == "legacy" ? "style='display: none;'": "";
if($indetec["legacy"] == ""){
$indetec["ids"]["fail2ban_whitelist"] = preg_replace('!\n+!', chr(10), $this->getConfig("dynamic_whitelist"));
}
$wl_filter = "^(\b(?:\d{1,3}\.){3}\d{1,3}\b)$"; // IPV4
$wl_filter .= "|^(\b(?:\d{1,3}\.){3}\d{1,3}\b)\/\d{1,2}$"; // IPV4 + subnet
$wl_filter .= "|^((\w|\d|[-\.]){1,})+(\w|\d|[-])$"; // Domains
$wl_filter .= "|^()$"; // Nothing (CR)
$wl_filter .= "|^(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}"; // IPV6
$wl_filter .= "|([0-9a-fA-F]{1,4}:){1,7}:";
$wl_filter .= "|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}";
$wl_filter .= "|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}";
$wl_filter .= "|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}";
$wl_filter .= "|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}";
$wl_filter .= "|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}";
$wl_filter .= "|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})";
$wl_filter .= "|:((:[0-9a-fA-F]{1,4}){1,7}|:)";
$wl_filter .= "|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}";
$wl_filter .= "|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]";
$wl_filter .= "|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]";
$wl_filter .= "|(2[0-4]";
$wl_filter .= "|1{0,1}[0-9]){0,1}[0-9])";
$wl_filter .= "|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]";
$wl_filter .= "|(2[0-4]";
$wl_filter .= "|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]";
$wl_filter .= "|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))$";
$indetec["wl_filter"] = $wl_filter;
$indetec["id_sync_fw_legacy"] = $asfw["id_sync_fw"] == "legacy" ? "checked" : "";
$indetec["id_sync_fw_enabled"] = $asfw["id_sync_fw"] != "legacy" ? "checked" : "";
$indetec["id_service_enabled"] = $asfw["id_service"] == "enabled" ? "checked" : "";
$indetec["id_service_disabled"] = $asfw["id_service"] != "enabled" ? "checked" : "";
return $indetec;
}
public function showPage($page) {
if (strpos($page, ".") !== false) {
throw new \Exception("Invalid page name $page");
}
// Check to see if it's 'zones', which means it's an old notification.
if ($page == "zones") {
$page = "about";
$_REQUEST['tab'] = "interfaces";
}
$view = __DIR__."/views/page.$page.php";
if (!file_exists($view)) {
throw new \Exception("Can't find page $page");
}
return load_view($view, array("fw" => $this, "module_status" => $this->sysadmin_info()));
}
public function NSLookUp_Check($host =""){
@list($ip_part, $subnet_part) = explode("/",$host);
if (!filter_var($ip_part, \FILTER_VALIDATE_IP)) {
/**
* Is a hostname?
*/
if(preg_match("/^([a-z\d](-*[a-z\d])*)(\.([a-z\d](-*[a-z\d])*))*$/i", $host) && preg_match("/^.{1,253}$/", $host) && preg_match("/^[^\.]{1,63}(\.[^\.]{1,63})*$/", $host)){
try {
$dns_entries = dns_get_record($host, \DNS_A);
}
catch (Exception $e) {
dbug("NSLookUP exception error : ".$e->getMessage()."\n");
return false;
}
$ip = [];
foreach($dns_entries as $entry){
if(!empty($entry["ip"])){
$ip[] = $entry["ip"];
}
}
return $ip;
};
return false;
}
$ip = $ip_part;
if(!empty($subnet_part)){
$ip = $ip_part."/".$subnet_part;
}
$data[] = $ip;
return $data;
}
public function getipzone($from){
switch($from){
case "custom_whitelist":
$result = $this->getConfig("custom_whitelist");
break;
case "extregips":
$result = $this->getExtRegistered();
break;
case "trusted":
$result = $this->getTrustedZone("trusted");
break;
case "local":
$result = $this->getTrustedZone("internal");
break;
case "other":
$result = $this->getTrustedZone("other");
break;
case "hosts":
$result = $this->getConfig("whiteHosts");
break;
case "all":
$list = array();
if($this->getConfig("idregextip") == "true" ){
$list["Ext. Registered"] = explode("\n", $this->getExtRegistered());
}
if($this->getConfig("trusted") == "true"){
$list["Trusted"] = explode("\n", $this->getTrustedZone("trusted"));
}
if($this->getConfig("local") == "true"){
$list["Local"] = explode("\n", $this->getTrustedZone("internal"));
}
if($this->getConfig("other")== "true"){
$list["Other"] = explode("\n", $this->getTrustedZone("other"));
}
$list["Custom"] = explode("\n",$this->getConfig("custom_whitelist"));
$list["Hosts"] = explode("\n",$this->getConfig("whiteHosts"));
return $list;
default:
$result = "";
}
return preg_replace('!\n+!', chr(10), $result);
}
public function buildCustomWhitelist($wl){
/**
* Remove duplicated entries
*/
$currentwl = $this->getConfig("custom_whitelist");
$both = $currentwl."\n".$wl;
$both = preg_replace('!\n+!', chr(10), $both);
$both = explode("\n", $both);
foreach($both as $ip){
if($ip == ""){
continue;
}
$nsips = $this->NSLookUp_Check($ip);
if($nsips === false || empty($nsips[0])){
return array("status" => false, "message" => sprintf("Hostname %s Error. IP address not resolved. Process aborted.", $ip ));
}
if(is_array($nsips)){
foreach($nsips as $nsip){
if(!empty($nsip)){
$list[] = $nsip;
}
}
}
}
$result = !empty($list) ? implode("\n", array_unique($list)) : "";
$this->setConfig("custom_whitelist",$result);
return $result;
}
public function firewall_preg_match_ips($ip){
preg_match_all('/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/m', $ip, $matches, PREG_SET_ORDER, 0);
return !empty($matches[0][0]) ? $matches[0][0] : "";
}
public function updateWhitelist($wl = ""){
$sa = $this->sysadmin_info();
if(empty($sa)){
return false;