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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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##|+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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$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['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['disablenatreflection'] = $config['system']['disablenatreflection'];
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$pconfig['reflectiontimeout'] = $config['system']['reflectiontimeout'];
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$pconfig['bypassstaticroutes'] = isset($config['filter']['bypassstaticroutes']);
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$pconfig['disablescrub'] = isset($config['system']['disablescrub']);
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if ($_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[] = "The Firewall Maximum States value must be an integer.";
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}
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if ($_POST['tcpidletimeout'] && !is_numericint($_POST['tcpidletimeout'])) {
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$input_errors[] = "The TCP idle timeout must be an integer.";
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}
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if ($_POST['reflectiontimeout'] && !is_numericint($_POST['reflectiontimeout'])) {
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$input_errors[] = "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($_POST['rfc959workaround'] == "yes")
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$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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$config['system']['optimization'] = $_POST['optimization'];
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$config['system']['maximumstates'] = $_POST['maximumstates'];
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if($_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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$config['system']['reflectiontimeout'] = $_POST['reflectiontimeout'];
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if($_POST['bypassstaticroutes'] == "yes")
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$config['system']['bypassstaticroutes'] = $_POST['bypassstaticroutes'];
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else
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unset($config['system']['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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write_config();
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$retval = 0;
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config_lock();
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$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("System","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]="as the name says, it's the normal optimization algorithm";
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descs[1]="used for high latency links, such as satellite links. Expires idle connections later than default";
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descs[2]="expires idle connections quicker. More efficient use of CPU and memory but can drop legitimate connections";
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descs[3]="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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<table width="100%" border="0" cellpadding="0" cellspacing="0">
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<tr>
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<td>
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<span class="vexpl">
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<span class="red">
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<strong>Note:</strong>
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</span>
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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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</td>
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</tr>
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<tr>
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<td class="tabnavtbl">
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<ul id="tabnav">
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<?php
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$tab_array = array();
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$tab_array[] = array("Admin Access", false, "system_advanced_admin.php");
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$tab_array[] = array("Firewall / NAT", true, "system_advanced_firewall.php");
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$tab_array[] = array("Networking", false, "system_advanced_network.php");
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$tab_array[] = array("Miscellaneous", false, "system_advanced_misc.php");
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$tab_array[] = array("System Tunables", false, "system_advanced_sysctl.php");
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display_top_tabs($tab_array);
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?>
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</ul>
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</td>
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</tr>
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<tr>
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<td class="tabcont">
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<form action="system_advanced_firewall.php" method="post" name="iform" id="iform">
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<table width="100%" border="0" cellpadding="6" cellspacing="0">
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<tr>
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<td colspan="2" valign="top" class="listtopic">Firewall Advanced</td>
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</tr>
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<?php
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/*
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<tr>
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<td width="22%" valign="top" class="vncell">Traffic shaper type</td>
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<td width="78%" class="vtable">
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<select name="shapertype" class="formselect">
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<option value="pfSense"<?php if($pconfig['shapertype'] == 'pfSense') echo " selected"; ?>><?= $g['product_name'] ?> (ALTQ)</option>
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<option value="m0n0"<?php if($pconfig['shapertype'] == 'm0n0') echo " selected"; ?>>M0n0wall (dummynet)</option>
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</select>
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</td>
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</tr>
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*/
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?>
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<tr>
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<td width="22%" valign="top" class="vncell">FTP server compatibility</td>
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<td width="78%" class="vtable">
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<input name="rfc959workaround" type="checkbox" id="rfc959workaround" value="yes" <?php if (isset($config['system']['rfc959workaround'])) echo "checked"; ?> />
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<strong>Allow data connections from the FTP command port</strong><br/>
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This allows for communication with ftp servers that violate
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RFC 959 by opening data connections from the command port (21).
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Thes should be opened on the data port(20). This option should
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not expose you to any extra risk as the firewall will still only
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allow connections on a port that ftp-proxy listens on.
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</td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell">IP Do-Not-Fragment compatibility</td>
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<td width="78%" class="vtable">
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<input name="scrubnodf" type="checkbox" id="scrubnodf" value="yes" <?php if (isset($config['system']['scrubnodf'])) echo "checked"; ?> />
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<strong>Clear invalid DF bits instead of dropping the packets</strong><br/>
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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. The filter will also randomize
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the IP identification field of outgoing packets with this option on,
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to compensate for operating systems that set the DF bit but set a
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zero IP identification header field.
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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">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($config['system']['optimization']=="normal") echo " selected"; ?>>normal</option>
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<option value="high-latency"<?php if($config['system']['optimization']=="high-latency") echo " selected"; ?>>high-latency</option>
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<option value="aggressive"<?php if($config['system']['optimization']=="aggressive") echo " selected"; ?>>aggressive</option>
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<option value="conservative"<?php if($config['system']['optimization']=="conservative") echo " selected"; ?>>conservative</option>
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</select>
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<br/>
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<textarea cols="60" rows="1" 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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Select which type of state table optimization your would like 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">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>Disable all packet filtering.</strong>
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<br/>
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<span class="vexpl">Note: This converts <?= $g['product_name'] ?> into a routing only platform!<br>
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Note: This will turn off NAT!
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</span>
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</td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell">Disable Firewall Scrub</td>
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<td width="78%" class="vtable">
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<input name="disablescrub" type="checkbox" id="disablescrub" value="yes" <?php if (isset($config['system']['disablescrub'])) echo "checked"; ?> />
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<strong>Disables the PF scrubbing option which can sometimes interfere with NFS and PPTP traffic.</strong>
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<br/>
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Click <a href='http://www.openbsd.org/faq/pf/scrub.html' target='_new'>here</a> 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">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 $pconfig['maximumstates']; ?>" />
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<br/>
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<strong>Maximum number of connections to hold in the firewall state table.</strong>
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<br/>
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<span class="vexpl">Note: Leave this blank for the default. On your system the default size is: <?= pfsense_default_state_size() ?></span>
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</td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell">Static route filtering</td>
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<td width="78%" class="vtable">
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<input name="bypassstaticroutes" type="checkbox" id="bypassstaticroutes" value="yes" <?php if ($pconfig['bypassstaticroutes']) echo "checked"; ?> />
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<strong>Bypass firewall rules for traffic on the same interface</strong>
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<br/>
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This option only applies if you have defined one or more static routes. If it is enabled, traffic that enters and
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leaves through the same interface will not be checked by the firewall. This may be desirable in some situations where
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multiple subnets are connected to the same interface.
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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 colspan="2" class="list" height="12"> </td>
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</tr>
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<?php if($config['interfaces']['lan']): ?>
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<tr>
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<td colspan="2" valign="top" class="listtopic">Network Address Translation</td>
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</tr>
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<tr>
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<td width="22%" valign="top" class="vncell">Disable NAT Reflection</td>
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<td width="78%" class="vtable">
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<input name="disablenatreflection" type="checkbox" id="disablenatreflection" value="yes" <?php if (isset($config['system']['disablenatreflection'])) echo "checked"; ?> />
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<strong>Disables the automatic creation of NAT redirect rules for access to your public IP addresses from within your internal networks. Note: Reflection only works on port forward type items and does not work for large ranges > 500 ports.</strong>
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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">Reflection Timeout</td>
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<td width="78%" class="vtable">
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<input name="reflectiontimeout" id="reflectiontimeout" value="<?php echo $config['system']['reflectiontimeout']; ?>" />
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<strong>Enter value for Reflection timeout in seconds.</strong>
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</td>
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</tr>
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<tr>
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<td colspan="2" class="list" height="12"> </td>
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</tr>
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<?php endif; ?>
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<tr>
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<td width="22%" valign="top"> </td>
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<td width="78%"><input name="Submit" type="submit" class="formbtn" value="Save" /></td>
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</tr>
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</table>
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</form>
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</td>
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</tr>
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</table>
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<?php include("fend.inc"); ?>
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</body>
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</html>
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