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<?php |
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/** |
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* Copyright © 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 Alexey Portnov, 4 2020 |
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*/ |
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namespace MikoPBX\Core\System\Configs; |
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use MikoPBX\Common\Models\{FirewallRules, NetworkFilters}; |
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use MikoPBX\Core\System\MikoPBXConfig; |
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use MikoPBX\Core\System\Util; |
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use Phalcon\Di\Injectable; |
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class IptablesConf extends Injectable |
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{ |
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private bool $firewall_enable; |
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private Fail2BanConf $fail2ban; |
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/** |
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* Firewall constructor. |
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*/ |
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public function __construct() |
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{ |
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$mikoPBXConfig = new MikoPBXConfig(); |
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$firewall_enable = $mikoPBXConfig->getGeneralSettings('PBXFirewallEnabled'); |
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$this->firewall_enable = ($firewall_enable === '1'); |
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$this->fail2ban = new Fail2BanConf(); |
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} |
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/** |
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* Applies iptables settings and restart firewall |
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*/ |
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public static function reloadFirewall(): void |
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{ |
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$pid_file = '/var/run/service_reload_firewall.pid'; |
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if (file_exists($pid_file)) { |
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$old_pid = file_get_contents($pid_file); |
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$process = Util::getPidOfProcess("^{$old_pid}"); |
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if ($process !== '') { |
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return; // another restart process exists |
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} |
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} |
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file_put_contents($pid_file, getmypid()); |
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$firewall = new self(); |
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$firewall->applyConfig(); |
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unlink($pid_file); |
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} |
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/** |
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* Apples iptables settings |
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**/ |
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public function applyConfig(): void |
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{ |
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$this->fail2ban->fail2banStop(); |
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$this->dropAllRules(); |
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$this->fail2ban->fail2banMakeDirs(); |
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if ($this->firewall_enable) { |
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$arr_command = []; |
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$arr_command[] = $this->getIptablesInputRule('', '-m conntrack --ctstate ESTABLISHED,RELATED'); |
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// Добавляем разрешения на сервисы. |
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$this->addFirewallRules($arr_command); |
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// Все остальное запрещаем. |
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$arr_command[] = $this->getIptablesInputRule('', '', 'DROP'); |
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// Кастомизация правил firewall. |
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$arr_commands_custom = []; |
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$out = []; |
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Util::fileWriteContent('/etc/firewall_additional', ''); |
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$catPath = Util::which('cat'); |
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$grepPath = Util::which('grep'); |
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$busyboxPath = Util::which('busybox'); |
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$awkPath = Util::which('awk'); |
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Util::mwExec( |
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"{$catPath} /etc/firewall_additional | {$grepPath} -v '|' | {$grepPath} -v '&'| {$grepPath} '^iptables' | {$busyboxPath} {$awkPath} -F ';' '{print $1}'", |
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$arr_commands_custom |
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); |
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if (Util::isSystemctl()) { |
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Util::mwMkdir('/etc/iptables'); |
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file_put_contents('/etc/iptables/iptables.mikopbx', implode("\n", $arr_command)); |
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file_put_contents( |
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'/etc/iptables/iptables.mikopbx', |
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"\n" . implode("\n", $arr_commands_custom), |
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FILE_APPEND |
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); |
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$systemctlPath = Util::which('systemctl'); |
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Util::mwExec("{$systemctlPath} restart mikopbx_iptables"); |
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} else { |
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Util::mwExecCommands($arr_command, $out, 'firewall'); |
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Util::mwExecCommands($arr_commands_custom, $out, 'firewall_additional'); |
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} |
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} |
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// Setup fail2ban |
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if ($this->fail2ban->fail2ban_enable) { |
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$this->fail2ban->writeConfig(); |
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$this->fail2ban->fail2banStart(); |
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} else { |
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$this->fail2ban->fail2banStop(); |
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} |
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} |
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/** |
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* Flush all firewall rules |
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*/ |
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private function dropAllRules(): void |
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{ |
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$iptablesPath = Util::which('iptables'); |
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Util::mwExec("{$iptablesPath} -F"); |
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Util::mwExec("{$iptablesPath} -X"); |
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} |
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/** |
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* Makes iptables rule string |
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* |
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* @param string $dport |
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* @param string $other_data |
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* @param string $action |
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* |
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* @return string |
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*/ |
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private function getIptablesInputRule($dport = '', $other_data = '', $action = 'ACCEPT'): string |
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{ |
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$data_port = ''; |
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if (trim($dport) !== '') { |
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$data_port = '--dport ' . $dport; |
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} |
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$other_data = trim($other_data); |
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return "iptables -A INPUT $other_data $data_port -j $action"; |
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} |
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/** |
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* Makes iptables rules |
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* |
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* @param $arr_command |
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*/ |
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private function addFirewallRules(&$arr_command): void |
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{ |
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/** @var \MikoPBX\Common\Models\FirewallRules $result */ |
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/** @var \MikoPBX\Common\Models\FirewallRules $rule */ |
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$result = FirewallRules::find(); |
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foreach ($result as $rule) { |
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if ($rule->portfrom !== $rule->portto && trim($rule->portto) !== '') { |
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$port = "{$rule->portfrom}:{$rule->portto}"; |
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} else { |
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$port = $rule->portfrom; |
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} |
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/** @var \MikoPBX\Common\Models\NetworkFilters $network_filter */ |
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$network_filter = NetworkFilters::findFirst($rule->networkfilterid); |
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if ($network_filter === null) { |
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Util::sysLogMsg('Firewall', "network_filter_id not found {$rule->networkfilterid}"); |
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continue; |
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} |
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if ('0.0.0.0/0' === $network_filter->permit && $rule->action !== 'allow') { |
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continue; |
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} |
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$other_data = "-p {$rule->protocol}"; |
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$other_data .= ($network_filter === null) ? '' : ' -s ' . $network_filter->permit; |
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if ($rule->protocol === 'icmp') { |
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$port = ''; |
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$other_data .= ' --icmp-type echo-request'; |
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} |
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$action = ($rule->action === 'allow') ? 'ACCEPT' : 'DROP'; |
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$arr_command[] = $this->getIptablesInputRule($port, $other_data, $action); |
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} |
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// Allow all local connections |
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$arr_command[] = $this->getIptablesInputRule('', '-s 127.0.0.1 ', 'ACCEPT'); |
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} |
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/** |
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* Updates firewall rules according to default template |
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* |
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*/ |
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public static function updateFirewallRules(): void |
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{ |
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// Store current conditions |
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$currentRules = []; |
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$firewallRules = FirewallRules::find(); |
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foreach ($firewallRules as $firewallRule) { |
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$currentRules[$firewallRule->networkfilterid][$firewallRule->category] = |
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[ |
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'action' => $firewallRule->action, |
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'description' => $firewallRule->description |
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]; |
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} |
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// Delete outdated records |
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$firewallRules->delete(); |
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$defaultRules = FirewallRules::getDefaultRules(); |
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$networkFilters = NetworkFilters::find(); |
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foreach ($networkFilters as $networkFilter) { |
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foreach ($defaultRules as $key => $value) { |
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foreach ($value['rules'] as $rule) { |
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$newRule = new FirewallRules(); |
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$newRule->networkfilterid = $networkFilter->id; |
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$newRule->protocol = $rule['protocol']; |
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$newRule->portfrom = $rule['portfrom']; |
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$newRule->portto = $rule['portto']; |
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$newRule->category = $key; |
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if (array_key_exists($key, $currentRules[$networkFilter->id])) { |
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$newRule->action = $currentRules[$networkFilter->id][$key]['action']; |
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} else { |
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$newRule->action = 'block'; |
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} |
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$newRule->description = $currentRules[$networkFilter->id][$key]['description']; |
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$newRule->save(); |
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} |
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} |
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} |
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} |
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} |
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mikopbx /
Core
