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<?php |
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/* |
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* Copyright (C) MIKO LLC - All Rights Reserved |
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* Unauthorized copying of this file, via any medium is strictly prohibited |
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* Proprietary and confidential |
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* Written by Nikolay Beketov, 8 2020 |
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* |
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*/ |
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namespace MikoPBX\Core\System\Configs; |
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use MikoPBX\Common\Models\Fail2BanRules; |
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use MikoPBX\Common\Models\NetworkFilters; |
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use MikoPBX\Core\System\MikoPBXConfig; |
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use MikoPBX\Core\System\System; |
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use MikoPBX\Core\System\Util; |
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use MikoPBX\Core\System\Verify; |
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use Phalcon\Di\Injectable; |
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use Phalcon\Text; |
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use SQLite3; |
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class Fail2BanConf extends Injectable |
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{ |
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public const FILTER_PATH = '/etc/fail2ban/filter.d'; |
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public const FAIL2BAN_DB_PATH = '/var/lib/fail2ban/fail2ban.sqlite3'; |
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public bool $fail2ban_enable; |
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/** |
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* Fail2Ban constructor. |
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*/ |
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public function __construct() |
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{ |
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$mikoPBXConfig = new MikoPBXConfig(); |
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$fail2ban_enable = $mikoPBXConfig->getGeneralSettings('PBXFail2BanEnabled'); |
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$this->fail2ban_enable = ($fail2ban_enable === '1'); |
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} |
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/** |
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* Check fail2ban service and restart it died |
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*/ |
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public static function checkFail2ban(): void |
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{ |
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$fail2ban = new self(); |
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if ($fail2ban->fail2ban_enable |
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&& ! $fail2ban->fail2banIsRunning()) { |
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$fail2ban->fail2banStart(); |
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} |
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} |
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/** |
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* Check fail2ban service status |
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* |
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* @return bool |
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*/ |
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private function fail2banIsRunning(): bool |
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{ |
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$fail2banPath = Util::which('fail2ban-client'); |
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$res_ping = Util::mwExec("{$fail2banPath} ping"); |
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$res_stat = Util::mwExec("{$fail2banPath} status"); |
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$result = false; |
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if ($res_ping === 0 && $res_stat === 0) { |
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$result = true; |
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} |
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return $result; |
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} |
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/** |
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* Start fail2ban service |
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*/ |
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public function fail2banStart(): void |
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{ |
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if (Util::isSystemctl()) { |
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$systemctlPath = Util::which('systemctl'); |
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Util::mwExec("{$systemctlPath} restart fail2ban"); |
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return; |
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} |
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// Чистим битые строки, не улдаленные после отмены бана. |
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$this->cleanFail2banDb(); |
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Util::killByName('fail2ban-server'); |
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$fail2banPath = Util::which('fail2ban-client'); |
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$cmd_start = "{$fail2banPath} -x start"; |
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$command = "($cmd_start;) > /dev/null 2>&1 &"; |
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Util::mwExec($command); |
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} |
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/** |
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* Cleans all fail2ban blocks |
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*/ |
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public function cleanFail2banDb(): void |
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{ |
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/** @var \MikoPBX\Common\Models\Fail2BanRules $res */ |
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$res = Fail2BanRules::findFirst("id = '1'"); |
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if ($res !== null) { |
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$ban_time = $res->bantime; |
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} else { |
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$ban_time = '43800'; |
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} |
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$path_db = self::FAIL2BAN_DB_PATH; |
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$db = new SQLite3($path_db); |
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$db->busyTimeout(3000); |
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if (false === $this->tableBanExists($db)) { |
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return; |
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} |
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$q = 'DELETE' . ' from bans WHERE (timeofban+' . $ban_time . ')<' . time(); |
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$db->query($q); |
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} |
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/** |
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* Checks whether BANS table exists in DB or not |
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* |
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* @param SQLite3 $db |
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* |
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* @return bool |
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*/ |
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public function tableBanExists($db): bool |
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{ |
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$q_check = 'SELECT name FROM sqlite_master WHERE type = "table" AND name="bans"'; |
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$result_check = $db->query($q_check); |
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return (false !== $result_check && $result_check->fetchArray(SQLITE3_ASSOC) !== false); |
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} |
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/** |
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* Shutdown fail2ban service |
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*/ |
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public function fail2banStop(): void |
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{ |
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if (Util::isSystemctl()) { |
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$systemctlPath = Util::which('systemctl'); |
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Util::mwExec("{$systemctlPath} stop fail2ban"); |
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} else { |
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$fail2banPath = Util::which('fail2ban-client'); |
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Util::mwExec("{$fail2banPath} -x stop"); |
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} |
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} |
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/** |
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* Create fail2ban dirs and DB if it does not exists |
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* |
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* @return string |
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*/ |
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public function fail2banMakeDirs(): string |
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{ |
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$res_file = self::FAIL2BAN_DB_PATH; |
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$filename = basename($res_file); |
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$old_dir_db = '/cf/fail2ban'; |
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$dir_db = $this->di->getShared('config')->path('core.fail2banDbDir'); |
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if (empty($dir_db)) { |
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$dir_db = '/var/spool/fail2ban'; |
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} |
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Util::mwMkdir($dir_db); |
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// Создаем рабочие каталоги. |
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$db_bd_dir = dirname($res_file); |
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Util::mwMkdir($db_bd_dir); |
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$create_link = false; |
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// Символическая ссылка на базу данных. |
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if (@filetype($res_file) !== 'link') { |
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@unlink($res_file); |
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$create_link = true; |
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} elseif (readlink($res_file) === "$old_dir_db/$filename") { |
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@unlink($res_file); |
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$create_link = true; |
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if (file_exists("$old_dir_db/$filename")) { |
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// Перемещаем файл в новое местоположение. |
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$mvPath = Util::which('mv'); |
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Util::mwExec("{$mvPath} '$old_dir_db/$filename' '$dir_db/$filename'"); |
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} |
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} |
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if ($create_link === true) { |
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@symlink("$dir_db/$filename", $res_file); |
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} |
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return $res_file; |
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} |
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/** |
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* Записываем конфиг для fail2ban. Описываем правила блокировок. |
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*/ |
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public function writeConfig(): void |
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{ |
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$user_whitelist = ''; |
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/** @var \MikoPBX\Common\Models\Fail2BanRules $res */ |
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$res = Fail2BanRules::findFirst("id = '1'"); |
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if ($res !== null) { |
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$max_retry = $res->maxretry; |
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$find_time = $res->findtime; |
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$ban_time = $res->bantime; |
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$whitelist = $res->whitelist; |
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$arr_whitelist = explode(' ', $whitelist); |
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foreach ($arr_whitelist as $ip_string) { |
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if (Verify::isIpAddress($ip_string)) { |
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$user_whitelist .= "$ip_string "; |
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} |
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} |
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$net_filters = NetworkFilters::find("newer_block_ip = '1'"); |
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foreach ($net_filters as $filter) { |
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$user_whitelist .= "{$filter->permit} "; |
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} |
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$user_whitelist = trim($user_whitelist); |
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} else { |
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$max_retry = '10'; |
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$find_time = '1800'; |
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$ban_time = '43200'; |
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} |
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$this->generateJails(); |
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$jails = [ |
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'dropbear' => 'iptables-allports[name=SSH, protocol=all]', |
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'mikopbx-www' => 'iptables-allports[name=HTTP, protocol=all]', |
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]; |
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$modulesJails = $this->generateModulesJailsLocal(); |
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$jails = array_merge($jails, $modulesJails); |
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$config = "[DEFAULT]\n" . |
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"ignoreip = 127.0.0.1 {$user_whitelist}\n\n"; |
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$syslog_file = SyslogConf::getSyslogFile(); |
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foreach ($jails as $jail => $action) { |
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$config .= "[{$jail}]\n" . |
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"enabled = true\n" . |
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"backend = process\n" . |
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"logpath = {$syslog_file}\n" . |
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// "logprocess = logread -f\n". |
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"maxretry = {$max_retry}\n" . |
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"findtime = {$find_time}\n" . |
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"bantime = {$ban_time}\n" . |
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"logencoding = utf-8\n" . |
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"action = {$action}\n\n"; |
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} |
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$log_dir = System::getLogDir() . '/asterisk/'; |
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$config .= "[asterisk_security_log]\n" . |
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"enabled = true\n" . |
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"filter = asterisk\n" . |
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"action = iptables-allports[name=ASTERISK, protocol=all]\n" . |
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"logencoding = utf-8\n" . |
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"maxretry = {$max_retry}\n" . |
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"findtime = {$find_time}\n" . |
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"bantime = {$ban_time}\n" . |
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"logpath = {$log_dir}security_log\n\n"; |
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$config .= "[asterisk_error]\n" . |
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"enabled = true\n" . |
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"filter = asterisk\n" . |
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"action = iptables-allports[name=ASTERISK_ERROR, protocol=all]\n" . |
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"maxretry = {$max_retry}\n" . |
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"findtime = {$find_time}\n" . |
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"bantime = {$ban_time}\n" . |
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"logencoding = utf-8\n" . |
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"logpath = {$log_dir}error\n\n"; |
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$config .= "[asterisk_public]\n" . |
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"enabled = true\n" . |
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"filter = asterisk\n" . |
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"action = iptables-allports[name=ASTERISK_PUBLIC, protocol=all]\n" . |
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"maxretry = {$max_retry}\n" . |
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"findtime = {$find_time}\n" . |
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"bantime = {$ban_time}\n" . |
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"logencoding = utf-8\n" . |
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"logpath = {$log_dir}messages\n\n"; |
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Util::fileWriteContent('/etc/fail2ban/jail.local', $config); |
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} |
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/** |
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* Creates additional rules |
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*/ |
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private function generateJails(): void |
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{ |
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$filterPath = self::FILTER_PATH; |
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$conf = "[INCLUDES]\n" . |
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"before = common.conf\n" . |
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"[Definition]\n" . |
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"_daemon = [\S\W\s]+web_auth\n" . |
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'failregex = ^%(__prefix_line)sFrom:\s<HOST>\sUserAgent:(\S|\s)*Wrong password$' . "\n" . |
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' ^(\S|\s)*nginx:\s+\d+/\d+/\d+\s+(\S|\s)*status\s+403(\S|\s)*client:\s+<HOST>(\S|\s)*' . "\n" . |
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"ignoreregex =\n"; |
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file_put_contents("{$filterPath}/mikopbx-www.conf", $conf); |
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$conf = "[INCLUDES]\n" . |
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"before = common.conf\n" . |
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"[Definition]\n" . |
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"_daemon = (authpriv.warn )?dropbear\n" . |
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'prefregex = ^%(__prefix_line)s<F-CONTENT>(?:[Ll]ogin|[Bb]ad|[Ee]xit).+</F-CONTENT>$' . "\n" . |
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'failregex = ^[Ll]ogin attempt for nonexistent user (\'.*\' )?from <HOST>:\d+$' . "\n" . |
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' ^[Bb]ad (PAM )?password attempt for .+ from <HOST>(:\d+)?$' . "\n" . |
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' ^[Ee]xit before auth \(user \'.+\', \d+ fails\): Max auth tries reached - user \'.+\' from <HOST>:\d+\s*$' . "\n" . |
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"ignoreregex =\n"; |
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file_put_contents("{$filterPath}/dropbear.conf", $conf); |
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301
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|
|
|
|
302
|
|
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$this->generateModulesFilters(); |
|
303
|
|
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} |
|
304
|
|
|
|
|
305
|
|
|
/** |
|
306
|
|
|
* Generate additional modules filter files |
|
307
|
|
|
*/ |
|
308
|
|
|
protected function generateModulesFilters(): void |
|
309
|
|
|
{ |
|
310
|
|
|
$filterPath = self::FILTER_PATH; |
|
311
|
|
|
$additionalModules = $this->di->getShared('pbxConfModules'); |
|
312
|
|
|
$rmPath = Util::which('rm'); |
|
313
|
|
|
Util::mwExec("{$rmPath} -rf {$filterPath}/module_*.conf"); |
|
314
|
|
|
foreach ($additionalModules as $appClass) { |
|
315
|
|
|
if (method_exists($appClass, 'generateFail2BanJails')) { |
|
316
|
|
|
$content = $appClass->generateFail2BanJails(); |
|
317
|
|
|
if ( ! empty($content)) { |
|
318
|
|
|
$moduleUniqueId = $appClass->moduleUniqueId; |
|
319
|
|
|
$fileName = Text::uncamelize($moduleUniqueId,'_').'.conf'; |
|
320
|
|
|
file_put_contents("{$filterPath}/{$fileName}", $content); |
|
321
|
|
|
} |
|
322
|
|
|
} |
|
323
|
|
|
} |
|
324
|
|
|
} |
|
325
|
|
|
|
|
326
|
|
|
/** |
|
327
|
|
|
* Generate additional modules include to /etc/fail2ban/jail.local |
|
328
|
|
|
* |
|
329
|
|
|
* @return array |
|
330
|
|
|
*/ |
|
331
|
|
|
protected function generateModulesJailsLocal(): array |
|
332
|
|
|
{ |
|
333
|
|
|
$jails = []; |
|
334
|
|
|
$additionalModules = $this->di->getShared('pbxConfModules'); |
|
335
|
|
|
foreach ($additionalModules as $appClass) { |
|
336
|
|
|
if (method_exists($appClass, 'generateFail2BanJails')) { |
|
337
|
|
|
$content = $appClass->generateFail2BanJails(); |
|
338
|
|
|
if ( ! empty($content)) { |
|
339
|
|
|
$moduleUniqueId = $appClass->moduleUniqueId; |
|
340
|
|
|
$fileName = Text::uncamelize($moduleUniqueId,'_'); |
|
341
|
|
|
$jails[$fileName] = "iptables-allports[name={$moduleUniqueId}, protocol=all]"; |
|
342
|
|
|
} |
|
343
|
|
|
} |
|
344
|
|
|
} |
|
345
|
|
|
|
|
346
|
|
|
return $jails; |
|
347
|
|
|
} |
|
348
|
|
|
|
|
349
|
|
|
} |
mikopbx /
Core
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If you suppress an error, we recommend checking for the error condition explicitly: