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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['disablenegate'] = isset($config['system']['disablenegate']);
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$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($_POST['disablenegate'] == "yes")
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$config['system']['disablenegate'] = $_POST['disablenegate'];
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else
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unset($config['system']['disablenegate']);
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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 predictable 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!"), $g['product_name']);?><br>
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<?=gettext("Note: This will also turn off NAT!");?>
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<br/><?=gettext("If you only want to disable NAT, and not firewall rules, visit the");?> <a href="firewall_nat_out.php"><?=gettext("Outbound NAT");?></a> <?=gettext("page");?>.
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</span>
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</td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell"><?=gettext("Disable Firewall Scrub");?></td>
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<td width="78%" class="vtable">
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<input name="disablescrub" type="checkbox" id="disablescrub" value="yes" <?php if (isset($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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</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 $pconfig['maximumtableentries']; ?>" />
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<br/>
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322
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<strong><?=gettext("Maximum number of table entries for systems such as aliases, sshlockout, snort, etc, combined.");?></strong>
|
|
323
|
<br/>
|
|
324
|
<span class="vexpl">
|
|
325
|
<?=gettext("Note: Leave this blank for the default.");?>
|
|
326
|
<?php if (empty($pconfig['maximumtableentries'])): ?>
|
|
327
|
<?= gettext("On your system the default size is:");?> <?= pfsense_default_table_entries_size(); ?>
|
|
328
|
<?php endif; ?>
|
|
329
|
</span>
|
|
330
|
</td>
|
|
331
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</tr>
|
|
332
|
<tr>
|
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333
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<td width="22%" valign="top" class="vncell"><?=gettext("Static route filtering");?></td>
|
|
334
|
<td width="78%" class="vtable">
|
|
335
|
<input name="bypassstaticroutes" type="checkbox" id="bypassstaticroutes" value="yes" <?php if ($pconfig['bypassstaticroutes']) echo "checked"; ?> />
|
|
336
|
<strong><?=gettext("Bypass firewall rules for traffic on the same interface");?></strong>
|
|
337
|
<br/>
|
|
338
|
<?=gettext("This option only applies if you have defined one or more static routes. If it is enabled, traffic that enters and " .
|
|
339
|
"leaves through the same interface will not be checked by the firewall. This may be desirable in some situations where " .
|
|
340
|
"multiple subnets are connected to the same interface.");?>
|
|
341
|
<br/>
|
|
342
|
</td>
|
|
343
|
</tr>
|
|
344
|
<tr>
|
|
345
|
<td width="22%" valign="top" class="vncell">Disable Auto-added VPN rules</td>
|
|
346
|
<td width="78%" class="vtable">
|
|
347
|
<input name="disablevpnrules" type="checkbox" id="disablevpnrules" value="yes" <?php if (isset($config['system']['disablevpnrules'])) echo "checked"; ?> />
|
|
348
|
<strong><?=gettext("Disable all auto-added VPN rules.");?></strong>
|
|
349
|
<br />
|
|
350
|
<span class="vexpl"><?=gettext("Note: This disables automatically added rules for IPsec, PPTP.");?>
|
|
351
|
</span>
|
|
352
|
</td>
|
|
353
|
</tr>
|
|
354
|
<tr>
|
|
355
|
<td width="22%" valign="top" class="vncell">Disable reply-to</td>
|
|
356
|
<td width="78%" class="vtable">
|
|
357
|
<input name="disablereplyto" type="checkbox" id="disablereplyto" value="yes" <?php if ($pconfig['disablereplyto']) echo "checked"; ?> />
|
|
358
|
<strong><?=gettext("Disable reply-to on WAN rules");?></strong>
|
|
359
|
<br />
|
|
360
|
<?=gettext("With Multi-WAN you generally want to ensure traffic leaves the same interface it arrives on, hence reply-to is added automatically by default. " .
|
|
361
|
"When using bridging, you must disable this behavior if the WAN gateway IP is different from the gateway IP of the hosts behind the bridged interface.");?>
|
|
362
|
<br />
|
|
363
|
</td>
|
|
364
|
</tr>
|
|
365
|
<tr>
|
|
366
|
<td width="22%" valign="top" class="vncell">Disable Negate rules</td>
|
|
367
|
<td width="78%" class="vtable">
|
|
368
|
<input name="disablenegate" type="checkbox" id="disablenegate" value="yes" <?php if ($pconfig['disablenegate']) echo "checked"; ?> />
|
|
369
|
<strong><?=gettext("Disable Negate rule on policy routing rules");?></strong>
|
|
370
|
<br />
|
|
371
|
<?=gettext("With Multi-WAN you generally want to ensure traffic reaches directly connected networks and VPN networks when using policy routing. You can disable this for special purposes but it requires manually creating rules for these networks");?>
|
|
372
|
<br />
|
|
373
|
</td>
|
|
374
|
</tr>
|
|
375
|
<tr>
|
|
376
|
<td colspan="2" class="list" height="12"> </td>
|
|
377
|
</tr>
|
|
378
|
<?php if(count($config['interfaces']) > 1): ?>
|
|
379
|
<tr>
|
|
380
|
<td colspan="2" valign="top" class="listtopic"><?=gettext("Network Address Translation");?></td>
|
|
381
|
</tr>
|
|
382
|
<tr>
|
|
383
|
<td width="22%" valign="top" class="vncell"><?=gettext("Disable NAT Reflection for port forwards");?></td>
|
|
384
|
<td width="78%" class="vtable">
|
|
385
|
<input name="disablenatreflection" type="checkbox" id="disablenatreflection" value="yes" <?php if (isset($config['system']['disablenatreflection'])) echo "checked"; ?> />
|
|
386
|
<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>
|
|
387
|
</td>
|
|
388
|
</tr>
|
|
389
|
<tr>
|
|
390
|
<td width="22%" valign="top" class="vncell"><?=gettext("Reflection Timeout");?></td>
|
|
391
|
<td width="78%" class="vtable">
|
|
392
|
<input name="reflectiontimeout" id="reflectiontimeout" value="<?php echo $config['system']['reflectiontimeout']; ?>" /><br/>
|
|
393
|
<strong><?=gettext("Enter value for Reflection timeout in seconds. Note: Only applies to Reflection on port forwards.");?></strong>
|
|
394
|
</td>
|
|
395
|
</tr>
|
|
396
|
<tr>
|
|
397
|
<td width="22%" valign="top" class="vncell"><?=gettext("Disable NAT Reflection for 1:1 NAT");?></td>
|
|
398
|
<td width="78%" class="vtable">
|
|
399
|
<input name="disablebinatreflection" type="checkbox" id="disablebinatreflection" value="yes" <?php if (!isset($config['system']['enablebinatreflection'])) echo "checked"; ?> />
|
|
400
|
<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>
|
|
401
|
</td>
|
|
402
|
</tr>
|
|
403
|
<tr>
|
|
404
|
<td width="22%" valign="top" class="vncell"> </td>
|
|
405
|
<td width="78%" class="vtable">
|
|
406
|
<input name="enablenatreflectionhelper" type="checkbox" id="enablenatreflectionhelper" value="yes" <?php if (isset($config['system']['enablenatreflectionhelper'])) echo "checked"; ?> />
|
|
407
|
<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>
|
|
408
|
<br/>
|
|
409
|
<?=gettext("Currently only applies to 1:1 NAT rules. Required for full functionality of NAT Reflection for 1:1 NAT.");?>
|
|
410
|
</td>
|
|
411
|
</tr>
|
|
412
|
<tr>
|
|
413
|
<td width="22%" valign="top" class="vncell"><?=gettext("TFTP Proxy");?></td>
|
|
414
|
<td width="78%" class="vtable">
|
|
415
|
<select name="tftpinterface[]" multiple="true" class="formselect" size="3">
|
|
416
|
<?php
|
|
417
|
$ifdescs = get_configured_interface_with_descr();
|
|
418
|
foreach ($ifdescs as $ifent => $ifdesc):
|
|
419
|
?>
|
|
420
|
<option value="<?=$ifent;?>" <?php if (in_array($ifent, $pconfig['tftpinterface'])) echo "selected"; ?>><?=gettext($ifdesc);?></option>
|
|
421
|
<?php endforeach; ?>
|
|
422
|
</select>
|
|
423
|
<strong><?=gettext("Choose the interfaces where you want TFTP proxy helper to be enabled.");?></strong>
|
|
424
|
</td>
|
|
425
|
</tr>
|
|
426
|
<tr>
|
|
427
|
<td colspan="2" class="list" height="12"> </td>
|
|
428
|
</tr>
|
|
429
|
<?php endif; ?>
|
|
430
|
<tr>
|
|
431
|
<td width="22%" valign="top"> </td>
|
|
432
|
<td width="78%"><input name="Submit" type="submit" class="formbtn" value="<?=gettext("Save");?>" /></td>
|
|
433
|
</tr>
|
|
434
|
</table>
|
|
435
|
</td>
|
|
436
|
</tr>
|
|
437
|
</div>
|
|
438
|
</table>
|
|
439
|
</form>
|
|
440
|
|
|
441
|
<?php include("fend.inc"); ?>
|
|
442
|
</body>
|
|
443
|
</html>
|
|
444
|
|
