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<?php
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/* $Id$ */
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/*
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system_advanced_firewall.php
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part of pfSense
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Copyright (C) 2005-2007 Scott Ullrich
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Copyright (C) 2008 Shrew Soft Inc
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originally part of m0n0wall (http://m0n0.ch/wall)
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Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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pfSense_MODULE: system
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*/
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##|+PRIV
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##|*IDENT=page-system-advanced-firewall
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##|*NAME=System: Advanced: Firewall and NAT page
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##|*DESCR=Allow access to the 'System: Advanced: Firewall and NAT' page.
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##|*MATCH=system_advanced.php*
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##|-PRIV
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require("guiconfig.inc");
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require_once("functions.inc");
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require_once("filter.inc");
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require_once("shaper.inc");
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$pconfig['disablefilter'] = $config['system']['disablefilter'];
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$pconfig['rfc959workaround'] = $config['system']['rfc959workaround'];
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$pconfig['scrubnodf'] = $config['system']['scrubnodf'];
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$pconfig['scrubrnid'] = $config['system']['scrubrnid'];
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$pconfig['tcpidletimeout'] = $config['filter']['tcpidletimeout'];
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$pconfig['optimization'] = $config['filter']['optimization'];
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$pconfig['maximumstates'] = $config['system']['maximumstates'];
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$pconfig['maximumtableentries'] = $config['system']['maximumtableentries'];
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$pconfig['disablereplyto'] = isset($config['system']['disablereplyto']);
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$pconfig['disablenatreflection'] = $config['system']['disablenatreflection'];
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if (!isset($config['system']['enablebinatreflection']))
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$pconfig['disablebinatreflection'] = "yes";
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else
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$pconfig['disablebinatreflection'] = "";
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$pconfig['reflectiontimeout'] = $config['system']['reflectiontimeout'];
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$pconfig['bypassstaticroutes'] = isset($config['filter']['bypassstaticroutes']);
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$pconfig['disablescrub'] = isset($config['system']['disablescrub']);
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$pconfig['tftpinterface'] = explode(",", $config['system']['tftpinterface']);
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$pconfig['disablevpnrules'] = isset($config['system']['disablevpnrules']);
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if ($_POST) {
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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['maximumstates'] && !is_numericint($_POST['maximumstates'])) {
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$input_errors[] = gettext("The Firewall Maximum States value must be an integer.");
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}
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if ($_POST['maximumtableentries'] && !is_numericint($_POST['maximumtableentries'])) {
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$input_errors[] = gettext("The Firewall Maximum Table Entries value must be an integer.");
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}
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if ($_POST['tcpidletimeout'] && !is_numericint($_POST['tcpidletimeout'])) {
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$input_errors[] = gettext("The TCP idle timeout must be an integer.");
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}
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if ($_POST['reflectiontimeout'] && !is_numericint($_POST['reflectiontimeout'])) {
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$input_errors[] = gettext("The Reflection timeout must be an integer.");
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}
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ob_flush();
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flush();
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if (!$input_errors) {
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if($_POST['disablefilter'] == "yes")
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$config['system']['disablefilter'] = "enabled";
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else
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unset($config['system']['disablefilter']);
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if($_POST['disablevpnrules'] == "yes")
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$config['system']['disablevpnrules'] = true;
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else
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unset($config['system']['disablevpnrules']);
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if($_POST['rfc959workaround'] == "yes")
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$config['system']['rfc959workaround'] = "enabled";
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else
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unset($config['system']['rfc959workaround']);
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if($_POST['scrubnodf'] == "yes")
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$config['system']['scrubnodf'] = "enabled";
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else
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unset($config['system']['scrubnodf']);
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if($_POST['scrubrnid'] == "yes")
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$config['system']['scrubrnid'] = "enabled";
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else
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unset($config['system']['scrubrnid']);
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$config['system']['optimization'] = $_POST['optimization'];
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$config['system']['maximumstates'] = $_POST['maximumstates'];
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$config['system']['maximumtableentries'] = $_POST['maximumtableentries'];
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if($_POST['disablenatreflection'] == "yes")
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$config['system']['disablenatreflection'] = $_POST['disablenatreflection'];
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else
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unset($config['system']['disablenatreflection']);
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if($_POST['disablebinatreflection'] == "yes")
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unset($config['system']['enablebinatreflection']);
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else
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$config['system']['enablebinatreflection'] = "yes";
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if($_POST['disablereplyto'] == "yes")
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$config['system']['disablereplyto'] = $_POST['disablereplyto'];
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else
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unset($config['system']['disablereplyto']);
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if($_POST['enablenatreflectionhelper'] == "yes")
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$config['system']['enablenatreflectionhelper'] = "yes";
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else
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unset($config['system']['enablenatreflectionhelper']);
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$config['system']['reflectiontimeout'] = $_POST['reflectiontimeout'];
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if($_POST['bypassstaticroutes'] == "yes")
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$config['filter']['bypassstaticroutes'] = $_POST['bypassstaticroutes'];
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elseif(isset($config['filter']['bypassstaticroutes']))
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unset($config['filter']['bypassstaticroutes']);
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if($_POST['disablescrub'] == "yes")
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$config['system']['disablescrub'] = $_POST['disablescrub'];
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else
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unset($config['system']['disablescrub']);
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if ($_POST['tftpinterface'])
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$config['system']['tftpinterface'] = implode(",", $_POST['tftpinterface']);
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else
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unset($config['system']['tftpinterface']);
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write_config();
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/*
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* XXX: This is a kludge here but its the better place than on every filter reload.
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* NOTE: This is only for setting the ipfw state limits.
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*/
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if ($_POST['maximumstates'] && is_numeric($_POST['maximumstates']) && is_module_loaded("ipfw.ko"))
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filter_load_ipfw();
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$retval = 0;
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$retval = filter_configure();
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if(stristr($retval, "error") <> true)
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$savemsg = get_std_save_message($retval);
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else
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$savemsg = $retval;
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}
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}
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$pgtitle = array(gettext("System"),gettext("Advanced: Firewall and NAT"));
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include("head.inc");
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?>
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<body link="#0000CC" vlink="#0000CC" alink="#0000CC">
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<?php include("fbegin.inc"); ?>
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<script language="JavaScript">
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<!--
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var descs=new Array(5);
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descs[0]="<?=gettext("as the name says, it's the normal optimization algorithm");?>";
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descs[1]="<?=gettext("used for high latency links, such as satellite links. Expires idle connections later than default");?>";
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descs[2]="<?=gettext("expires idle connections quicker. More efficient use of CPU and memory but can drop legitimate connections");?>";
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descs[3]="<?=gettext("tries to avoid dropping any legitimate connections at the expense of increased memory usage and CPU utilization.");?>";
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function update_description(itemnum) {
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document.forms[0].info.value=descs[itemnum];
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}
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//-->
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</script>
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<?php
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if ($input_errors)
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print_input_errors($input_errors);
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if ($savemsg)
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print_info_box($savemsg);
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?>
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<form action="system_advanced_firewall.php" method="post" name="iform" id="iform">
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<table width="100%" border="0" cellpadding="0" cellspacing="0">
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<tr>
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<td class="tabnavtbl">
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<?php
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$tab_array = array();
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$tab_array[] = array(gettext("Admin Access"), false, "system_advanced_admin.php");
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$tab_array[] = array(gettext("Firewall / NAT"), true, "system_advanced_firewall.php");
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$tab_array[] = array(gettext("Networking"), false, "system_advanced_network.php");
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$tab_array[] = array(gettext("Miscellaneous"), false, "system_advanced_misc.php");
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$tab_array[] = array(gettext("System Tunables"), false, "system_advanced_sysctl.php");
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$tab_array[] = array(gettext("Notifications"), false, "system_advanced_notifications.php");
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display_top_tabs($tab_array);
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?>
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</ul>
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</td>
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</tr>
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<tr>
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<td id="mainarea">
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<div class="tabcont">
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<span class="vexpl">
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<span class="red">
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<strong><?=gettext("NOTE:");?> </strong>
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</span>
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<?=gettext("The options on this page are intended for use by advanced users only.");?>
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<br/>
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</span>
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<br/>
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<table width="100%" border="0" cellpadding="6" cellspacing="0">
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<tr>
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<td colspan="2" valign="top" class="listtopic"><?=gettext("Firewall Advanced");?></td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell"><?=gettext("IP Do-Not-Fragment compatibility");?></td>
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<td width="78%" class="vtable">
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<input name="scrubnodf" type="checkbox" id="scrubnodf" value="yes" <?php if (isset($config['system']['scrubnodf'])) echo "checked"; ?> />
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<strong><?=gettext("Clear invalid DF bits instead of dropping the packets");?></strong><br/>
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<?=gettext("This allows for communications with hosts that generate fragmented " .
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"packets with the don't fragment (DF) bit set. Linux NFS is known to " .
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"do this. This will cause the filter to not drop such packets but " .
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"instead clear the don't fragment bit.");?>
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</td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell"><?=gettext("IP Random id generation");?></td>
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<td width="78%" class="vtable">
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<input name="scrubrnid" type="checkbox" id="scrubnodf" value="yes" <?php if (isset($config['system']['scrubrnid'])) echo "checked"; ?> />
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<strong><?=gettext("Insert a stronger id into IP header of packets passing through the filter.");?></strong><br/>
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<?=gettext("Replaces the IP identification field of packets with random values to " .
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"compensate for operating systems that use predicatable values. " .
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"This option only applies to packets that are not fragmented after the " .
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"optional packet reassembly.");?>
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</td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell"><?=gettext("Firewall Optimization Options");?></td>
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<td width="78%" class="vtable">
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<select onChange="update_description(this.selectedIndex);" name="optimization" id="optimization">
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<option value="normal"<?php if($config['system']['optimization']=="normal") echo " selected"; ?>><?=gettext("normal");?></option>
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<option value="high-latency"<?php if($config['system']['optimization']=="high-latency") echo " selected"; ?>><?=gettext("high-latency");?></option>
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<option value="aggressive"<?php if($config['system']['optimization']=="aggressive") echo " selected"; ?>><?=gettext("aggressive");?></option>
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<option value="conservative"<?php if($config['system']['optimization']=="conservative") echo " selected"; ?>><?=gettext("conservative");?></option>
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</select>
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<br/>
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<textarea readonly="yes" cols="60" rows="2" id="info" name="info"style="padding:5px; border:1px dashed #990000; background-color: #ffffff; color: #000000; font-size: 8pt;"></textarea>
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<script language="javascript" type="text/javascript">
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update_description(document.forms[0].optimization.selectedIndex);
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</script>
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<br/>
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<?=gettext("Select the type of state table optimization to use");?>
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</td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell"><?=gettext("Disable Firewall");?></td>
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<td width="78%" class="vtable">
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<input name="disablefilter" type="checkbox" id="disablefilter" value="yes" <?php if (isset($config['system']['disablefilter'])) echo "checked"; ?> />
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<strong><?=gettext("Disable all packet filtering.");?></strong>
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<br/>
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<span class="vexpl"><?php printf(gettext("Note: This converts %s into a routing only platform!"), $g['product_name']);?><br>
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<?=gettext("Note: This will turn off NAT!");?>
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</span>
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</td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell"><?=gettext("Disable Firewall Scrub");?></td>
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<td width="78%" class="vtable">
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<input name="disablescrub" type="checkbox" id="disablescrub" value="yes" <?php if (isset($config['system']['disablescrub'])) echo "checked"; ?> />
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<strong><?=gettext("Disables the PF scrubbing option which can sometimes interfere with NFS and PPTP traffic.");?></strong>
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<br/>
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<?=gettext("Click")?> <a href='http://www.openbsd.org/faq/pf/scrub.html' target='_new'><?=gettext("here");?></a> <?=gettext("for more information.");?>
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</td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell"><?=gettext("Firewall Maximum States");?></td>
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<td width="78%" class="vtable">
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<input name="maximumstates" type="text" id="maximumstates" value="<?php echo $pconfig['maximumstates']; ?>" />
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<br/>
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<strong><?=gettext("Maximum number of connections to hold in the firewall state table.");?></strong>
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<br/>
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<span class="vexpl"><?=gettext("Note: Leave this blank for the default. On your system the default size is:");?> <?= pfsense_default_state_size() ?></span>
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</td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell"><?=gettext("Firewall Maximum Table Entries");?></td>
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<td width="78%" class="vtable">
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<input name="maximumtableentries" type="text" id="maximumtableentries" value="<?php echo $pconfig['maximumtableentries']; ?>" />
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<br/>
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<strong><?=gettext("Maximum number of table entries for systems such as aliases, sshlockout, snort, etc, combined.");?></strong>
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<br/>
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<span class="vexpl">
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<?=gettext("Note: Leave this blank for the default.");?>
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<?php if (empty($pconfig['maximumtableentries'])): ?>
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<?= gettext("On your system the default size is:");?> <?= pfsense_default_table_entries_size(); ?>
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<?php endif; ?>
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323
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</span>
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324
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</td>
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|
325
|
</tr>
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326
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<tr>
|
|
327
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<td width="22%" valign="top" class="vncell"><?=gettext("Static route filtering");?></td>
|
|
328
|
<td width="78%" class="vtable">
|
|
329
|
<input name="bypassstaticroutes" type="checkbox" id="bypassstaticroutes" value="yes" <?php if ($pconfig['bypassstaticroutes']) echo "checked"; ?> />
|
|
330
|
<strong><?=gettext("Bypass firewall rules for traffic on the same interface");?></strong>
|
|
331
|
<br/>
|
|
332
|
<?=gettext("This option only applies if you have defined one or more static routes. If it is enabled, traffic that enters and " .
|
|
333
|
"leaves through the same interface will not be checked by the firewall. This may be desirable in some situations where " .
|
|
334
|
"multiple subnets are connected to the same interface.");?>
|
|
335
|
<br/>
|
|
336
|
</td>
|
|
337
|
</tr>
|
|
338
|
<tr>
|
|
339
|
<td width="22%" valign="top" class="vncell">Disable Auto-added VPN rules</td>
|
|
340
|
<td width="78%" class="vtable">
|
|
341
|
<input name="disablevpnrules" type="checkbox" id="disablevpnrules" value="yes" <?php if (isset($config['system']['disablevpnrules'])) echo "checked"; ?> />
|
|
342
|
<strong><?=gettext("Disable all auto-added VPN rules.");?></strong>
|
|
343
|
<br />
|
|
344
|
<span class="vexpl"><?=gettext("Note: This disables automatically added rules for IPsec, PPTP.");?>
|
|
345
|
</span>
|
|
346
|
</td>
|
|
347
|
</tr>
|
|
348
|
<tr>
|
|
349
|
<td width="22%" valign="top" class="vncell">Disable reply-to</td>
|
|
350
|
<td width="78%" class="vtable">
|
|
351
|
<input name="disablereplyto" type="checkbox" id="disablereplyto" value="yes" <?php if ($pconfig['disablereplyto']) echo "checked"; ?> />
|
|
352
|
<strong><?=gettext("Disable reply-to on WAN rules");?></strong>
|
|
353
|
<br />
|
|
354
|
<?=gettext("With Multi-WAN you generally want to ensure traffic leaves the same interface it arrives on, hence reply-to is added automatically by default. " .
|
|
355
|
"When using bridging, you must disable this behavior if the WAN gateway IP is different from the gateway IP of the hosts behind the bridged interface.");?>
|
|
356
|
<br />
|
|
357
|
</td>
|
|
358
|
</tr>
|
|
359
|
<tr>
|
|
360
|
<td colspan="2" class="list" height="12"> </td>
|
|
361
|
</tr>
|
|
362
|
<?php if(count($config['interfaces']) > 1): ?>
|
|
363
|
<tr>
|
|
364
|
<td colspan="2" valign="top" class="listtopic"><?=gettext("Network Address Translation");?></td>
|
|
365
|
</tr>
|
|
366
|
<tr>
|
|
367
|
<td width="22%" valign="top" class="vncell"><?=gettext("Disable NAT Reflection for port forwards");?></td>
|
|
368
|
<td width="78%" class="vtable">
|
|
369
|
<input name="disablenatreflection" type="checkbox" id="disablenatreflection" value="yes" <?php if (isset($config['system']['disablenatreflection'])) echo "checked"; ?> />
|
|
370
|
<strong><?=gettext("Disables the automatic creation of additional NAT redirect rules for access to port forwards on your external IP addresses from within your internal networks. Note: Reflection for port forward entries is skipped for ranges larger than 500 ports.");?></strong>
|
|
371
|
</td>
|
|
372
|
</tr>
|
|
373
|
<tr>
|
|
374
|
<td width="22%" valign="top" class="vncell"><?=gettext("Reflection Timeout");?></td>
|
|
375
|
<td width="78%" class="vtable">
|
|
376
|
<input name="reflectiontimeout" id="reflectiontimeout" value="<?php echo $config['system']['reflectiontimeout']; ?>" /><br/>
|
|
377
|
<strong><?=gettext("Enter value for Reflection timeout in seconds. Note: Only applies to Reflection on port forwards.");?></strong>
|
|
378
|
</td>
|
|
379
|
</tr>
|
|
380
|
<tr>
|
|
381
|
<td width="22%" valign="top" class="vncell"><?=gettext("Disable NAT Reflection for 1:1 NAT");?></td>
|
|
382
|
<td width="78%" class="vtable">
|
|
383
|
<input name="disablebinatreflection" type="checkbox" id="disablebinatreflection" value="yes" <?php if (!isset($config['system']['enablebinatreflection'])) echo "checked"; ?> />
|
|
384
|
<strong><?=gettext("Disables the automatic creation of additional NAT 1:1 mappings for access to 1:1 mappings of your external IP addresses from within your internal networks. Note: Reflection for 1:1 NAT might not fully work in certain complex routing scenarios.");?></strong>
|
|
385
|
</td>
|
|
386
|
</tr>
|
|
387
|
<tr>
|
|
388
|
<td width="22%" valign="top" class="vncell"> </td>
|
|
389
|
<td width="78%" class="vtable">
|
|
390
|
<input name="enablenatreflectionhelper" type="checkbox" id="enablenatreflectionhelper" value="yes" <?php if (isset($config['system']['enablenatreflectionhelper'])) echo "checked"; ?> />
|
|
391
|
<strong><?=gettext("Automatically create outbound NAT rules which assist inbound NAT rules that direct traffic back out to the same subnet it originated from.");?></strong>
|
|
392
|
<br/>
|
|
393
|
<?=gettext("Currently only applies to 1:1 NAT rules. Required for full functionality of NAT Reflection for 1:1 NAT.");?>
|
|
394
|
</td>
|
|
395
|
</tr>
|
|
396
|
<tr>
|
|
397
|
<td width="22%" valign="top" class="vncell"><?=gettext("TFTP Proxy");?></td>
|
|
398
|
<td width="78%" class="vtable">
|
|
399
|
<select name="tftpinterface[]" multiple="true" class="formselect" size="3">
|
|
400
|
<?php
|
|
401
|
$ifdescs = get_configured_interface_with_descr();
|
|
402
|
foreach ($ifdescs as $ifent => $ifdesc):
|
|
403
|
?>
|
|
404
|
<option value="<?=$ifent;?>" <?php if (in_array($ifent, $pconfig['tftpinterface'])) echo "selected"; ?>><?=gettext($ifdesc);?></option>
|
|
405
|
<?php endforeach; ?>
|
|
406
|
</select>
|
|
407
|
<strong><?=gettext("Choose the interfaces where you want TFTP proxy helper to be enabled.");?></strong>
|
|
408
|
</td>
|
|
409
|
</tr>
|
|
410
|
<tr>
|
|
411
|
<td colspan="2" class="list" height="12"> </td>
|
|
412
|
</tr>
|
|
413
|
<?php endif; ?>
|
|
414
|
<tr>
|
|
415
|
<td width="22%" valign="top"> </td>
|
|
416
|
<td width="78%"><input name="Submit" type="submit" class="formbtn" value="<?=gettext("Save");?>" /></td>
|
|
417
|
</tr>
|
|
418
|
</table>
|
|
419
|
</td>
|
|
420
|
</tr>
|
|
421
|
</div>
|
|
422
|
</table>
|
|
423
|
</form>
|
|
424
|
|
|
425
|
<?php include("fend.inc"); ?>
|
|
426
|
</body>
|
|
427
|
</html>
|
|
428
|
|
