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<?php
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/*
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* vpn_l2tp.php
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*
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* part of pfSense (https://www.pfsense.org)
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* Copyright (c) 2004-2013 BSD Perimeter
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* Copyright (c) 2013-2016 Electric Sheep Fencing
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* Copyright (c) 2014-2024 Rubicon Communications, LLC (Netgate)
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* All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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##|+PRIV
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##|*IDENT=page-vpn-vpnl2tp
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##|*NAME=VPN: L2TP
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##|*DESCR=Allow access to the 'VPN: L2TP' page.
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##|*MATCH=vpn_l2tp.php*
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##|-PRIV
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require_once("guiconfig.inc");
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require_once("vpn.inc");
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$pconfig['remoteip'] = config_get_path('l2tp/radius/remoteip');
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$pconfig['localip'] = config_get_path('l2tp/radius/localip');
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$pconfig['l2tp_subnet'] = config_get_path('l2tp/radius/l2tp_subnet');
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$pconfig['mode'] = config_get_path('l2tp/radius/mode');
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$pconfig['interface'] = config_get_path('l2tp/radius/interface');
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$pconfig['l2tp_dns1'] = config_get_path('l2tp/radius/dns1');
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$pconfig['l2tp_dns2'] = config_get_path('l2tp/radius/dns2');
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$pconfig['mtu'] = config_get_path('l2tp/radius/mtu');
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$pconfig['radiusenable'] = config_path_enabled('l2tp/radius');
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$pconfig['radacct_enable'] = config_path_enabled('l2tp/accounting');
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$pconfig['radiusserver'] = config_get_path('l2tp/radius/radius')['server'];
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$pconfig['radiussecret'] = config_get_path('l2tp/radius/radius')['secret'];
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$pconfig['radiusissueips'] = config_path_enabled('l2tp/radiusissueips');
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$pconfig['n_l2tp_units'] = config_get_path('l2tp/radius/n_l2tp_units');
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$pconfig['paporchap'] = config_get_path('l2tp/radius/paporchap');
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$pconfig['secret'] = config_get_path('l2tp/radius/secret');
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if ($_POST['save']) {
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unset($input_errors);
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$pconfig = $_POST;
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/* input validation */
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if ($_POST['mode'] == "server") {
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$reqdfields = explode(" ", "localip");
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$reqdfieldsn = array(gettext("Server address"));
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if (!$_POST['radiusenable'] || !$_POST['radiusissueips']) {
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$reqdfields = array_merge($reqdfields, explode(" ", "remoteip"));
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$reqdfieldsn = array_merge($reqdfieldsn, array(gettext("Remote start address")));
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} elseif ($_POST['radiusenable']) {
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$reqdfields = array_merge($reqdfields, explode(" ", "radiusserver radiussecret"));
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$reqdfieldsn = array_merge($reqdfieldsn,
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array(gettext("RADIUS server address"), gettext("RADIUS shared secret")));
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}
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do_input_validation($_POST, $reqdfields, $reqdfieldsn, $input_errors);
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if (($_POST['localip'] && !is_ipaddrv4($_POST['localip']))) {
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$input_errors[] = gettext("A valid server address must be specified.");
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}
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if (is_ipaddr_configured($_POST['localip'])) {
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$input_errors[] = gettext("'Server address' parameter should NOT be set to any IP address currently in use on this firewall.");
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}
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if ($_POST['l2tp_subnet'] && !is_ipaddrv4($_POST['remoteip']) &&
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(!$_POST['radiusenable'] || !$_POST['radiusissueips'])) {
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$input_errors[] = gettext("A valid remote start address must be specified.");
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}
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if (($_POST['radiusserver'] && !is_ipaddrv4($_POST['radiusserver']))) {
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$input_errors[] = gettext("A valid RADIUS server address must be specified.");
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}
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if ($_POST['secret'] != $_POST['secret_confirm']) {
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$input_errors[] = gettext("Secret and confirmation must match");
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}
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if ($_POST['radiussecret'] != $_POST['radiussecret_confirm']) {
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$input_errors[] = gettext("RADIUS secret and confirmation must match");
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}
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if (!is_numericint($_POST['n_l2tp_units']) || $_POST['n_l2tp_units'] > 255) {
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$input_errors[] = gettext("Number of L2TP users must be between 1 and 255");
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}
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if (!$input_errors) {
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$_POST['remoteip'] = $pconfig['remoteip'] = gen_subnet($_POST['remoteip'], $_POST['l2tp_subnet']);
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if (is_inrange_v4($_POST['localip'], $_POST['remoteip'], ip_after($_POST['remoteip'], $_POST['n_l2tp_units'] - 1))) {
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$input_errors[] = gettext("The specified server address lies in the remote subnet.");
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}
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if ($_POST['localip'] == get_interface_ip("lan")) {
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$input_errors[] = gettext("The specified server address is equal to the LAN interface address.");
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}
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}
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if (!empty($_POST['l2tp_dns1']) && !is_ipaddrv4(trim($_POST['l2tp_dns1']))) {
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$input_errors[] = gettext("The field 'Primary L2TP DNS Server' must contain a valid IPv4 address.");
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}
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if (!empty($_POST['l2tp_dns2']) && !is_ipaddrv4(trim($_POST['l2tp_dns2']))) {
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$input_errors[] = gettext("The field 'Secondary L2TP DNS Server' must contain a valid IPv4 address.");
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}
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if (!empty($_POST['l2tp_dns2']) && empty($_POST['l2tp_dns1'])) {
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$input_errors[] = gettext("The Secondary L2TP DNS Server cannot be set when the Primary L2TP DNS Server is empty.");
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}
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if ($_POST['mtu']) {
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if (!is_numericint($_POST['mtu'])) {
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$input_errors[] = "MTU must be an integer.";
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}
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$min_mtu = 576;
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$max_mtu = 9000;
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if (($_POST['mtu'] < $min_mtu) || ($_POST['mtu'] > $max_mtu)) {
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$input_errors[] = sprintf(gettext("The MTU must be between %d and %d bytes."), $min_mtu, $max_mtu);
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}
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}
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}
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if (!$input_errors) {
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$l2tpcfg = config_get_path('l2tp');
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$l2tpcfg['remoteip'] = $_POST['remoteip'];
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$l2tpcfg['localip'] = $_POST['localip'];
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$l2tpcfg['l2tp_subnet'] = $_POST['l2tp_subnet'];
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$l2tpcfg['mode'] = $_POST['mode'];
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$l2tpcfg['interface'] = $_POST['interface'];
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$l2tpcfg['n_l2tp_units'] = $_POST['n_l2tp_units'];
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$l2tpcfg['radius']['server'] = $_POST['radiusserver'];
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if ($_POST['radiussecret'] != DMYPWD) {
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$l2tpcfg['radius']['secret'] = $_POST['radiussecret'];
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}
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if ($_POST['secret'] != DMYPWD) {
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$l2tpcfg['secret'] = $_POST['secret'];
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}
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$l2tpcfg['paporchap'] = $_POST['paporchap'];
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if ($_POST['l2tp_dns1'] == "") {
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if (isset($l2tpcfg['dns1'])) {
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unset($l2tpcfg['dns1']);
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}
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} else {
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$l2tpcfg['dns1'] = $_POST['l2tp_dns1'];
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}
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if ($_POST['l2tp_dns2'] == "") {
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if (isset($l2tpcfg['dns2'])) {
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unset($l2tpcfg['dns2']);
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}
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} else {
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$l2tpcfg['dns2'] = $_POST['l2tp_dns2'];
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}
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if ($_POST['mtu'] == "") {
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if (isset($l2tpcfg['mtu'])) {
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unset($l2tpcfg['mtu']);
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}
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} else {
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$l2tpcfg['mtu'] = $_POST['mtu'];
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}
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if ($_POST['radiusenable'] == "yes") {
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$l2tpcfg['radius']['enable'] = true;
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} else {
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unset($l2tpcfg['radius']['enable']);
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}
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if ($_POST['radacct_enable'] == "yes") {
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$l2tpcfg['radius']['accounting'] = true;
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} else {
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unset($l2tpcfg['radius']['accounting']);
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}
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if ($_POST['radiusissueips'] == "yes") {
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$l2tpcfg['radius']['radiusissueips'] = true;
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} else {
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unset($l2tpcfg['radius']['radiusissueips']);
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}
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config_set_path('l2tp', $l2tpcfg);
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write_config(gettext("L2TP VPN configuration changed."));
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$changes_applied = true;
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$retval = 0;
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$retval |= vpn_l2tp_configure();
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}
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}
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$pgtitle = array(gettext("VPN"), gettext("L2TP"), gettext("Configuration"));
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$pglinks = array("", "@self", "@self");
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$shortcut_section = "l2tps";
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include("head.inc");
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if ($input_errors) {
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print_input_errors($input_errors);
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}
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if ($changes_applied) {
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print_apply_result_box($retval);
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}
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$tab_array = array();
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$tab_array[] = array(gettext("Configuration"), true, "vpn_l2tp.php");
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$tab_array[] = array(gettext("Users"), false, "vpn_l2tp_users.php");
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display_top_tabs($tab_array);
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$form = new Form();
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$section = new Form_Section("Enable L2TP");
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$section->addInput(new Form_Checkbox(
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'mode',
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'Enable',
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'Enable L2TP server',
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($pconfig['mode'] == "server"),
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'server'
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));
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$form->add($section);
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$iflist = array();
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$interfaces = get_configured_interface_with_descr();
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foreach ($interfaces as $iface => $ifacename) {
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$iflist[$iface] = $ifacename;
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}
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$section = new Form_Section("Configuration");
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$section->addClass('toggle-l2tp-enable');
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$section->addInput(new Form_Select(
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'interface',
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'*Interface',
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$pconfig['interface'],
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$iflist
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));
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$section->addInput(new Form_Input(
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'localip',
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'*Server address',
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'text',
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$pconfig['localip']
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))->setHelp('Enter the IP address the L2TP server should give to clients for use as their "gateway". %1$s' .
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'Typically this is set to an unused IP just outside of the client range.%1$s%1$s' .
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'NOTE: This should NOT be set to any IP address currently in use on this firewall.', '<br />');
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$section->addInput(new Form_IpAddress(
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'remoteip',
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'*Remote address range',
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$pconfig['remoteip']
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))->addMask('l2tp_subnet', $pconfig['l2tp_subnet'], 32)->setWidth(5)
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->setHelp('Specify the starting address for the client IP address subnet.');
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$section->addInput(new Form_Select(
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'n_l2tp_units',
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'*Number of L2TP users',
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$pconfig['n_l2tp_units'],
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array_combine(range(1, 255, 1), range(1, 255, 1))
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));
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$section->addPassword(new Form_Input(
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'secret',
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'Secret',
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'password',
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$pconfig['secret']
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))->setHelp('Specify optional secret shared between peers. Required on some devices/setups.');
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$section->addInput(new Form_Select(
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'paporchap',
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'*Authentication type',
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$pconfig['paporchap'],
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array(
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'chap' => 'CHAP',
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'chap-msv2' => 'MS-CHAPv2',
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'pap' => 'PAP'
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)
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))->setHelp('Specifies the protocol to use for authentication.');
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$section->addInput(new Form_Input(
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'l2tp_dns1',
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'Primary L2TP DNS server',
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'text',
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$pconfig['l2tp_dns1']
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));
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$section->addInput(new Form_Input(
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'l2tp_dns2',
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'Secondary L2TP DNS server',
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'text',
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$pconfig['l2tp_dns2']
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));
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$section->addInput(new Form_Input(
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'mtu',
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'VPN MTU',
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'number',
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$pconfig['mtu']
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))->setHelp('If this field is blank, the adapter\'s default MTU will be used. ' .
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'This is typically 1500 bytes but can vary in some circumstances.');
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310
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$form->add($section);
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311
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312
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$section = new Form_Section("RADIUS");
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313
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$section->addClass('toggle-l2tp-enable');
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315
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$section->addInput(new Form_Checkbox(
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'radiusenable',
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'Enable',
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'Use a RADIUS server for authentication',
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$pconfig['radiusenable']
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))->setHelp('When set, all users will be authenticated using the RADIUS server specified below. The local user database will not be used.');
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$section->addInput(new Form_Checkbox(
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'radacct_enable',
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'Accounting',
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'Enable RADIUS accounting',
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$pconfig['radacct_enable']
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))->setHelp('Sends accounting packets to the RADIUS server.');
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$section->addInput(new Form_IpAddress(
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'radiusserver',
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'*Server',
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$pconfig['radiusserver']
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))->setHelp('Enter the IP address of the RADIUS server.');
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$section->addPassword(new Form_Input(
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'radiussecret',
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'*Secret',
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'password',
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339
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$pconfig['radiussecret']
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340
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))->setHelp('Enter the shared secret that will be used to authenticate to the RADIUS server.');
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341
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342
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$section->addInput(new Form_Checkbox(
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'radiusissueips',
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344
|
'RADIUS issued IPs',
|
|
345
|
'Issue IP Addresses via RADIUS server.',
|
|
346
|
$pconfig['radiusissueips']
|
|
347
|
));
|
|
348
|
|
|
349
|
$form->add($section);
|
|
350
|
|
|
351
|
print($form);
|
|
352
|
?>
|
|
353
|
<div class="infoblock blockopen">
|
|
354
|
<?php
|
|
355
|
print_info_box(gettext("Don't forget to add a firewall rule to permit traffic from L2TP clients."), 'info', false);
|
|
356
|
?>
|
|
357
|
</div>
|
|
358
|
|
|
359
|
<script type="text/javascript">
|
|
360
|
//<![CDATA[
|
|
361
|
events.push(function() {
|
|
362
|
|
|
363
|
function setL2TP () {
|
|
364
|
hide = ! $('#mode').prop('checked');
|
|
365
|
|
|
366
|
hideClass('toggle-l2tp-enable', hide);
|
|
367
|
}
|
|
368
|
|
|
369
|
function setRADIUS () {
|
|
370
|
hide = ! $('#radiusenable').prop('checked');
|
|
371
|
|
|
372
|
hideCheckbox('radacct_enable', hide);
|
|
373
|
hideInput('radiusserver', hide);
|
|
374
|
hideInput('radiussecret', hide);
|
|
375
|
hideCheckbox('radiusissueips', hide);
|
|
376
|
}
|
|
377
|
|
|
378
|
// on-click
|
|
379
|
$('#mode').click(function () {
|
|
380
|
setL2TP();
|
|
381
|
});
|
|
382
|
|
|
383
|
$('#radiusenable').click(function () {
|
|
384
|
setRADIUS();
|
|
385
|
});
|
|
386
|
|
|
387
|
// on-page-load
|
|
388
|
setRADIUS();
|
|
389
|
setL2TP();
|
|
390
|
|
|
391
|
});
|
|
392
|
//]]>
|
|
393
|
</script>
|
|
394
|
|
|
395
|
<?php include("foot.inc")?>
|