pfSense

<?php

/*

 * services_ntpd.php

 *

 * part of pfSense (https://www.pfsense.org)

 * Copyright (c) 2004-2013 BSD Perimeter

 * Copyright (c) 2013-2016 Electric Sheep Fencing

 * Copyright (c) 2014-2021 Rubicon Communications, LLC (Netgate)

 * Copyright (c) 2013 Dagorlad

 * All rights reserved.

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 * http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

##|+PRIV

##|*IDENT=page-services-ntpd

##|*NAME=Services: NTP Settings

##|*DESCR=Allow access to the 'Services: NTP Settings' page.

##|*MATCH=services_ntpd.php*

##|-PRIV

define('NUMTIMESERVERS', 10);		// The maximum number of configurable time servers

require_once("guiconfig.inc");

require_once('rrd.inc');

require_once("shaper.inc");

global $ntp_poll_min_default, $ntp_poll_max_default, $ntp_server_types;

$ntp_poll_values = system_ntp_poll_values();

$auto_pool_suffix = "pool.ntp.org";

$max_candidate_peers = 25;

$min_candidate_peers = 4;

if (!is_array($config['ntpd'])) {

	$config['ntpd'] = array();

}

if (empty($config['ntpd']['interface'])) {

	if (is_array($config['installedpackages']['openntpd']) && is_array($config['installedpackages']['openntpd']['config']) &&

	    is_array($config['installedpackages']['openntpd']['config'][0]) && !empty($config['installedpackages']['openntpd']['config'][0]['interface'])) {

		$pconfig['interface'] = explode(",", $config['installedpackages']['openntpd']['config'][0]['interface']);

		unset($config['installedpackages']['openntpd']);

		write_config(gettext("Upgraded settings from openntpd"));

	} else {

		$pconfig['interface'] = array();

	}

} else {

	$pconfig['interface'] = explode(",", $config['ntpd']['interface']);

}

if ($_POST) {

	unset($input_errors);

	$pconfig = $_POST;

	if (!empty($_POST['ntpmaxpeers']) && (!is_numericint($_POST['ntpmaxpeers']) ||

	    ($_POST['ntpmaxpeers'] < $min_candidate_peers) || ($_POST['ntpmaxpeers'] > $max_candidate_peers))) {

		$input_errors[] = sprintf(gettext("Max candidate pool peers must be a number between %d and %d"), $min_candidate_peers, $max_candidate_peers);

	}

	if ((strlen($pconfig['ntporphan']) > 0) && (!is_numericint($pconfig['ntporphan']) || ($pconfig['ntporphan'] < 1) || ($pconfig['ntporphan'] > 15))) {

		$input_errors[] = gettext("The supplied value for NTP Orphan Mode is invalid.");

	}

	if (!array_key_exists($pconfig['ntpminpoll'], $ntp_poll_values)) {

		$input_errors[] = gettext("The supplied value for Minimum Poll Interval is invalid.");

	}

	if (!array_key_exists($pconfig['ntpmaxpoll'], $ntp_poll_values)) {

		$input_errors[] = gettext("The supplied value for Maximum Poll Interval is invalid.");

	}

	for ($i = 0; $i < NUMTIMESERVERS; $i++) {

		if (isset($pconfig["servselect{$i}"]) && (($pconfig["servistype{$i}"] == 'pool') || 

		    (substr_compare($pconfig["server{$i}"], $auto_pool_suffix, strlen($pconfig["server{$i}"]) - strlen($auto_pool_suffix), strlen($auto_pool_suffix)) === 0))) {

			$input_errors[] = gettext("It is not possible to use 'No Select' for pools.");

		}

		if (!empty($pconfig["server{$i}"]) && !is_domain($pconfig["server{$i}"]) &&

		    !is_ipaddr($pconfig["server{$i}"])) {

			$input_errors[] = gettext("NTP Time Server names must be valid domain names, IPv4 addresses, or IPv6 addresses");

		}

	}

	if (is_numericint($pconfig['ntpminpoll']) &&

	    is_numericint($pconfig['ntpmaxpoll']) &&

	    ($pconfig['ntpmaxpoll'] < $pconfig['ntpminpoll'])) {

		$input_errors[] = gettext("The supplied value for Minimum Poll Interval is higher than NTP Maximum Poll Interval.");

	}

	if (isset($pconfig['serverauth'])) {

		if (empty($pconfig['serverauthkey'])) {

			$input_errors[] = gettext("The supplied value for NTP Authentication key can't be empty.");

		} elseif (($pconfig['serverauthalgo'] == 'md5') && ((strlen($pconfig['serverauthkey']) > 20) ||

		    !ctype_print($pconfig['serverauthkey']))) {

			$input_errors[] = gettext("The supplied value for NTP Authentication key for MD5 digest must be from 1 to 20 printable characters.");

		} elseif (($pconfig['serverauthalgo'] == 'sha1') && ((strlen($pconfig['serverauthkey']) != 40) ||

		    !ctype_xdigit($pconfig['serverauthkey']))) {

			$input_errors[] = gettext("The supplied value for NTP Authentication key for SHA1 digest must be hex-encoded string of 40 characters.");

		} elseif (($pconfig['serverauthalgo'] == 'sha256') && ((strlen($pconfig['serverauthkey']) != 64) ||

		    !ctype_xdigit($pconfig['serverauthkey']))) {

			$input_errors[] = gettext("The supplied value for NTP Authentication key for SHA256 digest must be hex-encoded string of 64 characters.");

		}

	}

	if (!$input_errors) {

		$config['ntpd']['enable'] = isset($_POST['enable']) ? 'enabled' : 'disabled';

		if (is_array($_POST['interface'])) {

			$config['ntpd']['interface'] = implode(",", $_POST['interface']);

		} elseif (isset($config['ntpd']['interface'])) {

			unset($config['ntpd']['interface']);

		}

		unset($config['ntpd']['prefer']);

		unset($config['ntpd']['noselect']);

		unset($config['ntpd']['ispool']);

		unset($config['ntpd']['ispeer']);

		$timeservers = '';

		for ($i = 0; $i < NUMTIMESERVERS; $i++) {

			$tserver = trim($_POST["server{$i}"]);

			if (!empty($tserver)) {

				$timeservers .= "{$tserver} ";

				if (isset($_POST["servprefer{$i}"])) {

					$config['ntpd']['prefer'] .= "{$tserver} ";

				}

				if (isset($_POST["servselect{$i}"])) {

					$config['ntpd']['noselect'] .= "{$tserver} ";

				}

				if ($_POST["servistype{$i}"] == 'pool') {

					$config['ntpd']['ispool'] .= "{$tserver} ";

				} elseif ($_POST["servistype{$i}"] == 'peer') {

					$config['ntpd']['ispeer'] .= "{$tserver} ";

				}

			}

		}

		if (trim($timeservers) == "") {

			$timeservers = "pool.ntp.org";

		}

		$config['system']['timeservers'] = trim($timeservers);

		if (!empty($pconfig['ntpmaxpeers'])) {

			$config['ntpd']['ntpmaxpeers'] = $pconfig['ntpmaxpeers'];

		} else {

			unset($config['ntpd']['ntpmaxpeers']);

		}

		$config['ntpd']['orphan'] = trim($pconfig['ntporphan']);

		$config['ntpd']['ntpminpoll'] = $pconfig['ntpminpoll'];

		$config['ntpd']['ntpmaxpoll'] = $pconfig['ntpmaxpoll'];

		$config['ntpd']['dnsresolv'] = $pconfig['dnsresolv'];

		if (!empty($_POST['logpeer'])) {

			$config['ntpd']['logpeer'] = $_POST['logpeer'];

		} elseif (isset($config['ntpd']['logpeer'])) {

			unset($config['ntpd']['logpeer']);

		}

		if (!empty($_POST['logsys'])) {

			$config['ntpd']['logsys'] = $_POST['logsys'];

		} elseif (isset($config['ntpd']['logsys'])) {

			unset($config['ntpd']['logsys']);

		}

		if (!empty($_POST['clockstats'])) {

			$config['ntpd']['clockstats'] = $_POST['clockstats'];

		} elseif (isset($config['ntpd']['clockstats'])) {

			unset($config['ntpd']['clockstats']);

		}

		if (!empty($_POST['loopstats'])) {

			$config['ntpd']['loopstats'] = $_POST['loopstats'];

		} elseif (isset($config['ntpd']['loopstats'])) {

			unset($config['ntpd']['loopstats']);

		}

		if (!empty($_POST['peerstats'])) {

			$config['ntpd']['peerstats'] = $_POST['peerstats'];

		} elseif (isset($config['ntpd']['peerstats'])) {

			unset($config['ntpd']['peerstats']);

		}

		if ((empty($_POST['statsgraph'])) == (isset($config['ntpd']['statsgraph']))) {

			$enable_rrd_graphing = true;

		}

		if (!empty($_POST['statsgraph'])) {

			$config['ntpd']['statsgraph'] = $_POST['statsgraph'];

		} elseif (isset($config['ntpd']['statsgraph'])) {

			unset($config['ntpd']['statsgraph']);

		}

		if (isset($enable_rrd_graphing)) {

			enable_rrd_graphing();

		}

		if (!empty($_POST['leaptext'])) {

			$config['ntpd']['leapsec'] = base64_encode($_POST['leaptext']);

		} elseif (isset($config['ntpd']['leapsec'])) {

			unset($config['ntpd']['leapsec']);

		}

		if (is_uploaded_file($_FILES['leapfile']['tmp_name'])) {

			$config['ntpd']['leapsec'] = base64_encode(file_get_contents($_FILES['leapfile']['tmp_name']));

		}

		if (!empty($_POST['serverauth'])) {

			$config['ntpd']['serverauth'] = $_POST['serverauth'];

			$config['ntpd']['serverauthkey'] = base64_encode(trim($_POST['serverauthkey']));

			$config['ntpd']['serverauthalgo'] = $_POST['serverauthalgo'];

		} elseif (isset($config['ntpd']['serverauth'])) {

			unset($config['ntpd']['serverauth']);

			unset($config['ntpd']['serverauthkey']);

			unset($config['ntpd']['serverauthalgo']);

		}

		write_config("Updated NTP Server Settings");

		$changes_applied = true;

		$retval = 0;

		$retval |= system_ntp_configure();

	}

}

function build_interface_list() {

	global $pconfig;

	$iflist = array('options' => array(), 'selected' => array());

	$interfaces = get_configured_interface_with_descr();

	$interfaces['lo0'] = "Localhost";

	foreach ($interfaces as $iface => $ifacename) {

		if (!is_ipaddr(get_interface_ip($iface)) &&

		    !is_ipaddrv6(get_interface_ipv6($iface))) {

			continue;

		}

		$iflist['options'][$iface] = $ifacename;

		if (in_array($iface, $pconfig['interface'])) {

			array_push($iflist['selected'], $iface);

		}

	}

	return($iflist);

}

init_config_arr(array('ntpd'));

$pconfig = &$config['ntpd'];

$pconfig['enable'] = ($config['ntpd']['enable'] != 'disabled') ? 'enabled' : 'disabled';

if (empty($pconfig['interface'])) {

	$pconfig['interface'] = array();

} else {

	$pconfig['interface'] = explode(",", $pconfig['interface']);

}

$pgtitle = array(gettext("Services"), gettext("NTP"), gettext("Settings"));

$pglinks = array("", "@self", "@self");

$shortcut_section = "ntp";

include("head.inc");

if ($input_errors) {

	print_input_errors($input_errors);

}

if ($changes_applied) {

	print_apply_result_box($retval);

}

$tab_array = array();

$tab_array[] = array(gettext("Settings"), true, "services_ntpd.php");

$tab_array[] = array(gettext("ACLs"), false, "services_ntpd_acls.php");

$tab_array[] = array(gettext("Serial GPS"), false, "services_ntpd_gps.php");

$tab_array[] = array(gettext("PPS"), false, "services_ntpd_pps.php");

display_top_tabs($tab_array);

$form = new Form;

$form->setMultipartEncoding();	// Allow file uploads

$section = new Form_Section('NTP Server Configuration');

$section->addInput(new Form_Checkbox(

	'enable',

	'Enable',

	'Enable NTP Server',

	($pconfig['enable'] == 'enabled')

))->setHelp('You may need to disable NTP if %1$s is running in a virtual machine and the host is responsible for the clock.', $g['product_label']);

$iflist = build_interface_list();

$section->addInput(new Form_Select(

	'interface',

	'Interface',

	$iflist['selected'],

	$iflist['options'],

	true

))->setHelp('Interfaces without an IP address will not be shown.%1$s' .

			'Selecting no interfaces will listen on all interfaces with a wildcard.%1$s' .

			'Selecting all interfaces will explicitly listen on only the interfaces/IPs specified.', '<br />');

$timeservers = explode(' ', $config['system']['timeservers']);

$maxrows = max(count($timeservers), 1);

for ($counter=0; $counter < $maxrows; $counter++) {

	$group = new Form_Group($counter == 0 ? 'Time Servers':'');

	$group->addClass('repeatable');

	$group->setAttribute('max_repeats', NUMTIMESERVERS);

	$group->setAttribute('max_repeats_alert', sprintf(gettext('%d is the maximum number of configured servers.'), NUMTIMESERVERS));

	$group->add(new Form_Input(

		'server' . $counter,

		null,

		'text',

		$timeservers[$counter],

		['placeholder' => 'Hostname']

	 ))->setWidth(3);

	 $group->add(new Form_Checkbox(

		'servprefer' . $counter,

		null,

		null,

		isset($config['ntpd']['prefer']) && isset($timeservers[$counter]) && substr_count($config['ntpd']['prefer'], $timeservers[$counter])

	 ))->sethelp('Prefer');

	 $group->add(new Form_Checkbox(

		'servselect' . $counter,

		null,

		null,

		isset($config['ntpd']['noselect']) && isset($timeservers[$counter]) && substr_count($config['ntpd']['noselect'], $timeservers[$counter])

	 ))->sethelp('No Select');

	if ((substr_compare($timeservers[$counter], $auto_pool_suffix, strlen($timeservers[$counter]) - strlen($auto_pool_suffix), strlen($auto_pool_suffix)) === 0) || (isset($config['ntpd']['ispool']) && isset($timeservers[$counter]) && substr_count($config['ntpd']['ispool'], $timeservers[$counter]))) {

		$servertype = 'pool';

	} elseif (isset($config['ntpd']['ispeer']) && isset($timeservers[$counter]) && substr_count($config['ntpd']['ispeer'], $timeservers[$counter])) {

		$servertype = 'peer';

	} else {

		$servertype = 'server';

	}

	$group->add(new Form_Select(

		'servistype' . $counter,

		null,

		$servertype,

		$ntp_server_types

	 ))->sethelp('Type')->setWidth(2);

	$group->add(new Form_Button(

		'deleterow' . $counter,

		'Delete',

		null,

		'fa-trash'

	))->addClass('btn-warning');

	 $section->add($group);

}

$section->addInput(new Form_Button(

	'addrow',

	'Add',

	null,

	'fa-plus'

))->addClass('btn-success');

$section->addInput(new Form_StaticText(

	null,

	$btnaddrow

))->setHelp(

	'NTP will only sync if a majority of the servers agree on the time.  For best results you should configure between 3 and 5 servers ' .

	'(%4$sNTP support pages recommend at least 4 or 5%5$s), or a pool. If only one server is configured, it %2$swill%3$s be believed, and if 2 servers ' .

	'are configured and they disagree, %2$sneither%3$s will be believed. Options:%1$s' .

	'%2$sPrefer%3$s - NTP should favor the use of this server more than all others.%1$s' .

	'%2$sNo Select%3$s - NTP should not use this server for time, but stats for this server will be collected and displayed.%1$s' .

	'%2$sType%3$s - Server, Peer or a Pool of NTP servers and not a single address. This is assumed for *.pool.ntp.org.',

	'<br />',

	'<b>',

	'</b>',

	'<a target="_blank" href="https://support.ntp.org/bin/view/Support/ConfiguringNTP">',

	'</a>'

	);

$section->addInput(new Form_Input(

	'ntpmaxpeers',

	'Max candidate pool peers',

	'number',

	$pconfig['ntpmaxpeers'],

	['min' => $min_candidate_peers, 'max' => $max_candidate_peers]

))->setHelp('Maximum number of candidate peers in the NTP pool. This value should be set low enough to provide sufficient alternate sources ' .

	    'while not contacting an excessively large number of peers. ' .

	    'Many servers inside public pools are provided by volunteers, ' .

	    'and a large candidate pool places unnecessary extra load ' .

	    'on the volunteer time servers for little to no added benefit. (Default: 5).');

$section->addInput(new Form_Input(

	'ntporphan',

	'Orphan Mode',

	'text',

	$pconfig['orphan'],

	['placeholder' => "12"]

))->setHelp('Orphan mode allows the system clock to be used when no other clocks are available. ' .

			'The number here specifies the stratum reported during orphan mode and should normally be set to a number high enough ' .

			'to insure that any other servers available to clients are preferred over this server (default: 12).');

$section->addInput(new Form_Select(

	'ntpminpoll',

	'Minimum Poll Interval',

	$pconfig['ntpminpoll'],

	$ntp_poll_values

))->setHelp('Minimum poll interval for NTP messages. If set, must be less than or equal to Maximum Poll Interval.');

$section->addInput(new Form_Select(

	'ntpmaxpoll',

	'Maximum Poll Interval',

	$pconfig['ntpmaxpoll'],

	$ntp_poll_values

))->setHelp('Maximum poll interval for NTP messages. If set, must be greater than or equal to Minimum Poll Interval.');

$section->addInput(new Form_Checkbox(

	'statsgraph',

	'NTP Graphs',

	'Enable RRD graphs of NTP statistics (default: disabled).',

	$pconfig['statsgraph']

));

$section->addInput(new Form_Checkbox(

	'logpeer',

	'Logging',

	'Log peer messages (default: disabled).',

	$pconfig['logpeer']

));

$section->addInput(new Form_Checkbox(

	'logsys',

	null,

	'Log system messages (default: disabled).',

	$pconfig['logsys']

))->setHelp('These options enable additional messages from NTP to be written to the System Log %1$sStatus > System Logs > NTP%2$s',

			'<a href="status_logs.php?logfile=ntpd">', '</a>.');

// Statistics logging section

$btnadv = new Form_Button(

	'btnadvstats',

	'Display Advanced',

	null,

	'fa-cog'

);

$btnadv->setAttribute('type','button')->addClass('btn-info btn-sm');

$section->addInput(new Form_StaticText(

	'Statistics Logging',

	$btnadv

))->setHelp('Warning: These options will create persistent daily log files in /var/log/ntp.');

$section->addInput(new Form_Checkbox(

	'clockstats',

	null,

	'Log reference clock statistics (default: disabled).',

	$pconfig['clockstats']

));

$section->addInput(new Form_Checkbox(

	'loopstats',

	null,

	'Log clock discipline statistics (default: disabled).',

	$pconfig['loopstats']

));

$section->addInput(new Form_Checkbox(

	'peerstats',

	null,

	'Log NTP peer statistics (default: disabled).',

	$pconfig['peerstats']

));

// Leap seconds section

$btnadv = new Form_Button(

	'btnadvleap',

	'Display Advanced',

	null,

	'fa-cog'

);

$btnadv->setAttribute('type','button')->addClass('btn-info btn-sm');

$section->addInput(new Form_StaticText(

	'Leap seconds',

	$btnadv

))->setHelp(

	'Leap seconds may be added or subtracted at the end of June or December. Leap seconds are administered by the ' .

	'%1$sIERS%2$s, who publish them in their Bulletin C approximately 6 - 12 months in advance.  Normally this correction ' .

	'should only be needed if the server is a stratum 1 NTP server, but many NTP servers do not advertise an upcoming leap ' .

	'second when other NTP servers synchronise to them.%3$s%4$sIf the leap second is important to your network services, ' .

	'it is %6$sgood practice%2$s to download and add the leap second file at least a day in advance of any time correction%5$s.%3$s ' .

	'More information and files for downloading can be found on their %1$swebsite%2$s, and also on the %7$NIST%2$s and %8$sNTP%2$s websites.',

	'<a target="_blank" href="https://www.iers.org">',

	'</a>',

	'<br />',

	'<b>',

	'</b>',

	'<a target="_blank" href="https://support.ntp.org/bin/view/Support/ConfiguringNTP">',

	'<a target="_blank" href="https://www.nist.gov">',

	'<a target="_blank" href="https://www.ntp.org">'

);

$section->addInput(new Form_Textarea(

	'leaptext',

	null,

	base64_decode(chunk_split($pconfig['leapsec']))

))->setHelp('Enter Leap second configuration as text OR select a file to upload.');

$section->addInput(new Form_Input(

	'leapfile',

	null,

	'file'

))->addClass('btn-default');

$section->addInput(new Form_Select(

	'dnsresolv',

	'DNS Resolution',

	$pconfig['dnsresolv'],

	array(

		'auto' => 'Auto',

		'inet' => 'IPv4',

		'inet6' => 'IPv6',

	)

))->setHelp('Force NTP peers DNS resolution IP protocol. Do not affect pools.');

$section->addInput(new Form_Checkbox(

	'serverauth',

	'Enable NTP Server Authentication',

	'Enable NTPv3 authentication (RFC 1305)',

	$pconfig['serverauth']

))->setHelp('Authentication allows the NTP client to confirm it is communicating with the intended server, ' .

	    'which protects against man-in-the-middle attacks.');

$group = new Form_Group('Authentication key');

$group->addClass('ntpserverauth');

$group->add(new Form_IpAddress(

	'serverauthkey',

	'NTP Authentication key',

	base64_decode($pconfig['serverauthkey']),

	['placeholder' => 'NTP Authentication key']

))->setHelp(

	'Key format: %1$s MD5 - The key is 1 to 20 printable characters %1$s' .

	'SHA1 - The key is a hex-encoded ASCII string of 40 characters %1$s' .

	'SHA256 - The key is a hex-encoded ASCII string of 64 characters',

	'<br />'

);

$group->add(new Form_Select(

	'serverauthalgo',

	null,

	$pconfig['serverauthalgo'],

	$ntp_auth_halgos

))->setWidth(3)->setHelp('Digest algorithm');

$section->add($group);

$form->add($section);

print($form);

?>

<script type="text/javascript">

//<![CDATA[

	// If this variable is declared, any help text will not be deleted when rows are added

	// IOW the help text will appear on every row

	retainhelp = true;

</script>

<script type="text/javascript">

//<![CDATA[

events.push(function() {

	// Show advanced stats options ============================================

	var showadvstats = false;

	function show_advstats(ispageload) {

		var text;

		// On page load decide the initial state based on the data.

		if (ispageload) {

<?php

			if (!$pconfig['clockstats'] && !$pconfig['loopstats'] && !$pconfig['peerstats']) {

				$showadv = false;

			} else {

				$showadv = true;

			}

?>

			showadvstats = <?php if ($showadv) {echo 'true';} else {echo 'false';} ?>;

		} else {

			// It was a click, swap the state.

			showadvstats = !showadvstats;

		}

		hideCheckbox('clockstats', !showadvstats);

		hideCheckbox('loopstats', !showadvstats);

		hideCheckbox('peerstats', !showadvstats);

		if (showadvstats) {

			text = "<?=gettext('Hide Advanced');?>";

		} else {

			text = "<?=gettext('Display Advanced');?>";

		}

		$('#btnadvstats').html('<i class="fa fa-cog"></i> ' + text);

	}

	$('#btnadvstats').click(function(event) {

		show_advstats();

	});

	// Show advanced leap second options ======================================

	var showadvleap = false;

	function show_advleap(ispageload) {

		var text;

		// On page load decide the initial state based on the data.

		if (ispageload) {

<?php

			// Note: leapfile is not a field saved in the config, so no need to test for it here.

			// leapsec is the encoded text in the config, leaptext is not a pconfig[] key.

			if (empty($pconfig['leapsec'])) {

				$showadv = false;

			} else {

				$showadv = true;

			}

?>

			showadvleap = <?php if ($showadv) {echo 'true';} else {echo 'false';} ?>;

		} else {

			// It was a click, swap the state.

			showadvleap = !showadvleap;

		}

		hideInput('leaptext', !showadvleap);

		hideInput('leapfile', !showadvleap);

		if (showadvleap) {

			text = "<?=gettext('Hide Advanced');?>";

		} else {

			text = "<?=gettext('Display Advanced');?>";

		}

		$('#btnadvleap').html('<i class="fa fa-cog"></i> ' + text);

	}

	function change_serverauth() {

		hideClass('ntpserverauth', !($('#serverauth').prop('checked')));

	}

	$('#btnadvleap').click(function(event) {

		show_advleap();

	});

	$('#serverauth').change(function () {

		change_serverauth();

	});

	// Set initial states

	show_advstats(true);

	show_advleap(true);

	change_serverauth();

	// Suppress "Delete row" button if there are fewer than two rows

	checkLastRow();

});

//]]>

</script>

<?php include("foot.inc");