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<?php
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/*
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	vpn_pptp.php
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	part of m0n0wall (http://m0n0.ch/wall)
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	Copyright (C) 2003-2005 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-vpn-vpnpptp
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##|*NAME=VPN: VPN PPTP page
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##|*DESCR=Allow access to the 'VPN: VPN PPTP' page.
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##|*MATCH=vpn_pptp.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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require_once("vpn.inc");
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if (!is_array($config['pptpd']['radius'])) {
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	$config['pptpd']['radius'] = array();
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}
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$pptpcfg = &$config['pptpd'];
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$pconfig['remoteip'] = $pptpcfg['remoteip'];
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$pconfig['localip'] = $pptpcfg['localip'];
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$pconfig['redir'] = $pptpcfg['redir'];
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$pconfig['mode'] = $pptpcfg['mode'];
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$pconfig['wins'] = $pptpcfg['wins'];
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$pconfig['req128'] = isset($pptpcfg['req128']);
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$pconfig['n_pptp_units'] = $pptpcfg['n_pptp_units'];
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$pconfig['pptp_subnet'] = $pptpcfg['pptp_subnet'];
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$pconfig['pptp_dns1'] = $pptpcfg['dns1'];
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$pconfig['pptp_dns2'] = $pptpcfg['dns2'];
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$pconfig['radiusenable'] = isset($pptpcfg['radius']['server']['enable']);
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$pconfig['radiusissueips'] = isset($pptpcfg['radius']['radiusissueips']);
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$pconfig['radiussecenable'] = isset($pptpcfg['radius']['server2']['enable']);
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$pconfig['radacct_enable'] = isset($pptpcfg['radius']['accounting']);
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$pconfig['radiusserver'] = $pptpcfg['radius']['server']['ip'];
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$pconfig['radiusserverport'] = $pptpcfg['radius']['server']['port'];
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$pconfig['radiusserveracctport'] = $pptpcfg['radius']['server']['acctport'];
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$pconfig['radiussecret'] = $pptpcfg['radius']['server']['secret'];
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$pconfig['radiusserver2'] = $pptpcfg['radius']['server2']['ip'];
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$pconfig['radiusserver2port'] = $pptpcfg['radius']['server2']['port'];
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$pconfig['radiusserver2acctport'] = $pptpcfg['radius']['server2']['acctport'];
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$pconfig['radiussecret2'] = $pptpcfg['radius']['server2']['secret2'];
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$pconfig['radius_acct_update'] = $pptpcfg['radius']['acct_update'];
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$pconfig['radius_nasip'] = $pptpcfg['radius']['nasip'];
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74
if ($_POST) {
75

    
76
	unset($input_errors);
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	$pconfig = $_POST;
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79
	/* input validation */
80
	if ($_POST['mode'] == "server") {
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		$reqdfields = explode(" ", "localip remoteip");
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		$reqdfieldsn = explode(",", "Server address,Remote start address");
83
		
84
		if ($_POST['radiusenable']) {
85
			$reqdfields = array_merge($reqdfields, explode(" ", "radiusserver radiussecret"));
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			$reqdfieldsn = array_merge($reqdfieldsn, 
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				explode(",", "RADIUS server address,RADIUS shared secret"));
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		}
89
		
90
		do_input_validation($_POST, $reqdfields, $reqdfieldsn, &$input_errors);
91
		
92
		if (($_POST['localip'] && !is_ipaddr($_POST['localip']))) {
93
			$input_errors[] = "A valid server address must be specified.";
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		}
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		if (($_POST['pptp_subnet'] && !is_ipaddr($_POST['remoteip']))) {
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			$input_errors[] = "A valid remote start address must be specified.";
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		}
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		if (($_POST['radiusserver'] && !is_ipaddr($_POST['radiusserver']))) {
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			$input_errors[] = "A valid RADIUS server address must be specified.";
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		}
101
		
102
		if (!$input_errors) {	
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			$_POST['remoteip'] = $pconfig['remoteip'] = gen_subnet($_POST['remoteip'], $_POST['pptp_subnet']);
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			$subnet_start = ip2long($_POST['remoteip']);
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			$subnet_end = ip2long($_POST['remoteip']) + $_POST['n_pptp_units'] - 1;
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			if ((ip2long($_POST['localip']) >= $subnet_start) && 
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			    (ip2long($_POST['localip']) <= $subnet_end)) {
109
				$input_errors[] = "The specified server address lies in the remote subnet.";	
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			}
111
			if ($_POST['localip'] == get_interface_ip("lan")) {
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				$input_errors[] = "The specified server address is equal to the LAN interface address.";	
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			}
114
		}
115
	} else if ($_POST['mode'] == "redir") {
116
		$reqdfields = explode(" ", "redir");
117
		$reqdfieldsn = explode(",", "PPTP redirection target address");
118
		
119
		do_input_validation($_POST, $reqdfields, $reqdfieldsn, &$input_errors);
120
		
121
		if (($_POST['redir'] && !is_ipaddr($_POST['redir']))) {
122
			$input_errors[] = "A valid target address must be specified.";
123
		}
124
	} else {
125
		unset($config['pptpd']['mode']);
126
	}
127

    
128
	if (!$input_errors) {
129
		$pptpcfg['remoteip'] = $_POST['remoteip'];
130
		$pptpcfg['redir'] = $_POST['redir'];
131
		$pptpcfg['localip'] = $_POST['localip'];
132
		$pptpcfg['mode'] = $_POST['mode'];
133
		$pptpcfg['wins'] = $_POST['wins'];
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		$pptpcfg['n_pptp_units'] = $_POST['n_pptp_units'];	
135
		$pptpcfg['pptp_subnet'] = $_POST['pptp_subnet'];
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		$pptpcfg['radius']['server']['ip'] = $_POST['radiusserver'];
137
		$pptpcfg['radius']['server']['port'] = $_POST['radiusserverport'];
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		$pptpcfg['radius']['server']['acctport'] = $_POST['radiusserveracctport'];
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		$pptpcfg['radius']['server']['secret'] = $_POST['radiussecret'];
140
		$pptpcfg['radius']['server2']['ip'] = $_POST['radiusserver2'];
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		$pptpcfg['radius']['server2']['port'] = $_POST['radiusserver2port'];
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		$pptpcfg['radius']['server2']['acctport'] = $_POST['radiusserver2acctport'];
143
		$pptpcfg['radius']['server2']['secret2'] = $_POST['radiussecret2'];
144
		$pptpcfg['radius']['nasip'] = $_POST['radius_nasip'];
145
		$pptpcfg['radius']['acct_update'] = $_POST['radius_acct_update'];
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147
 		if ($_POST['pptp_dns1'] == "") 
148
        		unset($pptpcfg['dns1']);
149
		else
150
			$pptpcfg['dns1'] = $_POST['pptp_dns1'];
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152
 		if ($_POST['pptp_dns2'] == "") 
153
        		unset($pptpcfg['dns2']);
154
		else
155
			$pptpcfg['dns2'] = $_POST['pptp_dns2'];
156

    
157
		if($_POST['req128'] == "yes") 
158
			$pptpcfg['req128'] = true;
159
		else
160
			unset($pptpcfg['req128']);
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162
		if($_POST['radiusenable'] == "yes") 
163
			$pptpcfg['radius']['server']['enable'] = true;
164
		else 
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			unset($pptpcfg['radius']['server']['enable']);
166
			
167
		if($_POST['radiussecenable'] == "yes") 
168
			$pptpcfg['radius']['server']['enable'] = true;
169
		else 
170
			unset($pptpcfg['radius']['server2']['enable']);
171
			
172
		if($_POST['radacct_enable'] == "yes") 
173
			$pptpcfg['radius']['accounting'] = true;
174
		else 
175
			unset($pptpcfg['radius']['accounting']);
176
		
177
		if($_POST['radiusissueips'] == "yes") {
178
			$pptpcfg['radius']['radiusissueips'] = true;
179
		} else
180
			unset($pptpcfg['radius']['radiusissueips']);
181
		
182
		write_config();
183
		
184
		$retval = 0;
185
		$retval = vpn_pptpd_configure();
186
		$savemsg = get_std_save_message($retval);
187
		
188
		filter_configure();
189
	}
190
}
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192
$pgtitle = array("VPN","VPN PPTP");
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include("head.inc");
194

    
195
?>
196

    
197
<body link="#0000CC" vlink="#0000CC" alink="#0000CC">
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<?php include("fbegin.inc"); ?>
199
<script language="JavaScript">
200
<!--
201
function get_radio_value(obj)
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{
203
	for (i = 0; i < obj.length; i++) {
204
		if (obj[i].checked)
205
			return obj[i].value;
206
	}
207
	return null;
208
}
209

    
210
function enable_change(enable_over) {
211
	if ((get_radio_value(document.iform.mode) == "server") || enable_over) {
212
		document.iform.remoteip.disabled = 0;
213
		document.iform.localip.disabled = 0;
214
		document.iform.req128.disabled = 0;
215
		document.iform.radiusenable.disabled = 0;
216
		document.iform.radiusissueips.disabled = 0;
217
		document.iform.wins.disabled = 0;
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		document.iform.n_pptp_units.disabled = 0;
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		document.iform.pptp_subnet.disabled = 0;	
220
		document.iform.pptp_dns1.disabled = 0;
221
		document.iform.pptp_dns2.disabled = 0;	
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223
		if (document.iform.radiusenable.checked || enable_over) {
224
			document.iform.radiussecenable.disabled = 0;
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			document.iform.radacct_enable.disabled = 0;
226
			document.iform.radiusserver.disabled = 0;
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			document.iform.radiusserverport.disabled = 0;
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			document.iform.radiusserveracctport.disabled = 0;
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			document.iform.radiussecret.disabled = 0;
230
			document.iform.radius_nasip.disabled = 0;	
231
			document.iform.radius_acct_update.disabled = 0;	
232
			document.iform.radiusissueips.disabled = 0;		
233
			if (document.iform.radiussecenable.checked || enable_over) {
234
				document.iform.radiusserver2.disabled = 0;
235
				document.iform.radiussecret2.disabled = 0;
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				document.iform.radiusserver2port.disabled = 0;
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				document.iform.radiusserver2acctport.disabled = 0;
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			} else {
239
	
240
				document.iform.radiusserver2.disabled = 1;
241
				document.iform.radiussecret2.disabled = 1;
242
				document.iform.radiusserver2port.disabled = 1;
243
				document.iform.radiusserver2acctport.disabled = 1;
244
			}	
245
		} else {
246
			document.iform.radacct_enable.disabled = 1;
247
			document.iform.radiusserver.disabled = 1;
248
			document.iform.radiusserverport.disabled = 1;
249
			document.iform.radiusissueips.disabled = 1;
250
			document.iform.radiusserveracctport.disabled = 1;
251
			document.iform.radiussecret.disabled = 1;
252
			document.iform.radius_nasip.disabled = 1;	
253
			document.iform.radius_acct_update.disabled = 1;	
254
			document.iform.radiusissueips.disabled = 1;
255
		}
256

    
257
	} else {
258
		document.iform.remoteip.disabled = 1;
259
		document.iform.localip.disabled = 1;
260
		document.iform.req128.disabled = 1;
261
		document.iform.n_pptp_units.disabled = 1;
262
		document.iform.pptp_subnet.disabled = 1;	
263
		document.iform.pptp_dns1.disabled = 1;
264
		document.iform.pptp_dns2.disabled = 1;
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		document.iform.radiusenable.disabled = 1;
266
		document.iform.radacct_enable.disabled = 1;
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		document.iform.radiusserver.disabled = 1;
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		document.iform.radiusserverport.disabled = 1;
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		document.iform.radiusissueips.disabled = 1;
270
		document.iform.radiusserveracctport.disabled = 1;
271
		document.iform.radiussecret.disabled = 1;
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		document.iform.radius_nasip.disabled = 1;	
273
		document.iform.radius_acct_update.disabled = 1;
274
		document.iform.radiussecenable.disabled = 1;
275
		document.iform.radiusserver2.disabled = 1;
276
		document.iform.radiusserver2port.disabled = 1;
277
		document.iform.radiusserver2acctport.disabled = 1;
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		document.iform.radiussecret2.disabled = 1;	
279
		document.iform.wins.disabled = 1;
280
		document.iform.radiusissueips.disabled = 1;
281
	}
282
	if ((get_radio_value(document.iform.mode) == "redir") || enable_over) {
283
		document.iform.redir.disabled = 0;
284
	} else {
285
		document.iform.redir.disabled = 1;
286
	}
287
}
288
//-->
289
</script>
290
<form action="vpn_pptp.php" method="post" name="iform" id="iform">
291
<?php if ($input_errors) print_input_errors($input_errors); ?>
292
<?php if ($savemsg) print_info_box($savemsg); ?>
293
<table width="100%" border="0" cellpadding="0" cellspacing="0">
294
  <tr><td class="tabnavtbl">
295
<?php
296
	$tab_array = array();
297
	$tab_array[0] = array("Configuration", true, "vpn_pptp.php");
298
	$tab_array[1] = array("Users", false, "vpn_pptp_users.php");
299
	display_top_tabs($tab_array);
300
?>  
301
  </td></tr>
302
  <tr> 
303
    <td>
304
<div id="mainarea">
305
              <table class="tabcont" width="100%" border="0" cellpadding="6" cellspacing="0">
306
                <tr> 
307
                  <td width="22%" valign="top" class="vtable">&nbsp;</td>
308
                  <td width="78%" class="vtable"> 
309
                    <input name="mode" type="radio" onclick="enable_change(false)" value="off"
310
				  	<?php if (($pconfig['mode'] != "server") && ($pconfig['mode'] != "redir")) echo "checked";?>>
311
                    Off</td>
312
                <tr> 
313
                  <td width="22%" valign="top" class="vtable">&nbsp;</td>
314
                  <td width="78%" class="vtable">
315
			<input type="radio" name="mode" value="redir" onclick="enable_change(false)" <?php if ($pconfig['mode'] == "redir") echo "checked"; ?>>
316
                    Redirect incoming PPTP connections to:</td>
317
                <tr> 
318
                  <td width="22%" valign="top" class="vncellreq">PPTP redirection</td>
319
                  <td width="78%" class="vtable"> 
320
                    <?=$mandfldhtml;?><input name="redir" type="text" class="formfld unknown" id="redir" size="20" value="<?=htmlspecialchars($pconfig['redir']);?>"> 
321
                    <br>
322
                    Enter the IP address of a host which will accept incoming 
323
                    PPTP connections.</td>
324
                <tr> 
325
                  <td width="22%" valign="top" class="vtable">&nbsp;</td>
326
                  <td width="78%" class="vtable">
327
			<input type="radio" name="mode" value="server" onclick="enable_change(false)" <?php if ($pconfig['mode'] == "server") echo "checked"; ?>>
328
                    Enable PPTP server</td>
329
                </tr>
330
                <tr> 
331
                  <td width="22%" valign="top" class="vncellreq">Server address</td>
332
                  <td width="78%" class="vtable"> 
333
                    <?=$mandfldhtml;?><input name="localip" type="text" class="formfld unknown" id="localip" size="20" value="<?=htmlspecialchars($pconfig['localip']);?>"> 
334
                    <br>
335
                    Enter the IP address the PPTP server should use on its side 
336
                    for all clients.</td>
337
                </tr>
338
                <tr> 
339
                  <td width="22%" valign="top" class="vncellreq">Remote address 
340
                    range</td>
341
                  <td width="78%" class="vtable"> 
342
                    <?=$mandfldhtml;?><input name="remoteip" type="text" class="formfld unknown" id="remoteip" size="20" value="<?=htmlspecialchars($pconfig['remoteip']);?>">
343
                    <br>
344
                    Specify the starting address for the client IP subnet.<br>
345
                </tr>
346
                <tr> 
347
                  <td width="22%" valign="top" class="vncellreq">Subnet netmask</td>
348
                  <td width="78%" class="vtable">
349
		    <select id="pptp_subnet" name="pptp_subnet">
350
		    <?php
351
		     for($x=0; $x<33; $x++) {
352
			if($x == $pconfig['pptp_subnet'])
353
				$SELECTED = " SELECTED";
354
			else
355
				$SELECTED = "";
356
			echo "<option value=\"{$x}\"{$SELECTED}>{$x}</option>\n";			
357
		     }
358
		    ?>
359
		    </select>
360
		    <br>Hint: 24 is 255.255.255.0
361
                  </td>
362
		</tr>
363
                <tr> 
364
                  <td width="22%" valign="top" class="vncellreq">No. PPTP users</td>
365
                  <td width="78%" class="vtable">
366
		    <select id="n_pptp_units" name="n_pptp_units">
367
		    <?php
368
		     for($x=0; $x<255; $x++) {
369
			if($x == $pconfig['n_pptp_units'])
370
				$SELECTED = " SELECTED";
371
			else
372
				$SELECTED = "";
373
			echo "<option value=\"{$x}\"{$SELECTED}>{$x}</option>\n";			
374
		     }
375
		    ?>
376
		    </select>
377
		    <br>Hint: 10 is TEN pptp clients
378
                  </td>
379
                </tr>
380
                <tr> 
381
                  <td width="22%" valign="top" class="vncell">PPTP DNS Servers</td>
382
                  <td width="78%" class="vtable"> 
383
                    <?=$mandfldhtml;?><input name="pptp_dns1" type="text" class="formfld unknown" id="pptp_dns1" size="20" value="<?=htmlspecialchars($pconfig['pptp_dns1']);?>">
384
                    <br>
385
			<input name="pptp_dns2" type="text" class="formfld unknown" id="pptp_dns2" size="20" value="<?=htmlspecialchars($pconfig['pptp_dns2']);?>">
386
                    <br>
387

    
388
                   primary and secondary DNS servers assigned to PPTP clients<br>
389
                </tr>
390
                <tr> 
391
                  <td width="22%" valign="top" class="vncell">WINS Server</td>
392
                  <td width="78%" valign="top" class="vtable">
393
                      <input name="wins" class="formfld unknown" id="wins" size="20" value="<?=htmlspecialchars($pconfig['wins']);?>">
394
                  </td>
395
                </tr>
396
                <tr> 
397
                  <td width="22%" valign="top" class="vncell">RADIUS</td>
398
                  <td width="78%" class="vtable"> 
399
                      <input name="radiusenable" type="checkbox" id="radiusenable" onclick="enable_change(false)" value="yes" <?php if ($pconfig['radiusenable']) echo "checked"; ?>>
400
                      <strong>Use a RADIUS server for authentication</strong><br>
401
                      When set, all users will be authenticated using 
402
                      the RADIUS server specified below. The local user database 
403
                      will not be used.<br>
404
                      <br>
405
                      <input name="radacct_enable" type="checkbox" id="radacct_enable" onclick="enable_change(false)" value="yes" <?php if ($pconfig['radacct_enable']) echo "checked"; ?>>
406
                      <strong>Enable RADIUS accounting <br>
407
                      </strong>Sends accounting packets to the RADIUS server.<br>
408
			 <br>
409
                      <input name="radiussecenable" type="checkbox" id="radiussecenable" onclick="enable_change(false)" value="yes" <?php if ($pconfig['radiussecenable']) echo "checked"; ?>>
410
                      <strong>Secondary RADIUS server for failover authentication</strong><br>
411
                      When set, all requests will go to the secondary server when primary fails<br>
412
		      <br>
413
                      <input name="radiusissueips" value="yes" type="checkbox" class="formfld" id="radiusissueips"<?php if($pconfig['radiusissueips']) echo " CHECKED"; ?>>
414
		      <strong>RADIUS issued IPs</strong>
415
                      <br>Issue IP addresses via RADIUS server.
416
		      </td>
417
                 </td>
418
                </tr>
419
                <tr> 
420
                  <td width="22%" valign="top" class="vncell">RADIUS NAS IP</td>
421
                  <td width="78%" valign="top" class="vtable">
422
                      <input name="radius_nasip" class="formfld unknown" id="radius_nasip" size="20" value="<?=htmlspecialchars($pconfig['radius_nasip']);?>">
423
                  </td>
424
		</tr>
425
                <tr> 
426
                  <td width="22%" valign="top" class="vncell">RADIUS Accounting Update</td>
427
                  <td width="78%" valign="top" class="vtable">
428
                      <input name="radius_acct_update" class="formfld unknown" id="radius_acct_update" size="20" value="<?=htmlspecialchars($pconfig['radius_acct_update']);?>">
429
                  </td>
430
		</tr>
431
                <tr> 
432
                  <td width="22%" valign="top" class="vncell">RADIUS Server </td>
433
                  <td width="78%" class="vtable">
434
                      <input name="radiusserver" type="text" class="formfld unknown" id="radiusserver" size="20" value="<?=htmlspecialchars($pconfig['radiusserver']);?>">
435
                      <input name="radiusserverport" type="text" class="formfld unknown" id="radiusserverport" size="4" value="<?=htmlspecialchars($pconfig['radiusserverport']);?>">
436
                      <input name="radiusserveracctport" type="text" class="formfld unknown" id="radiusserveracctport" size="4" value="<?=htmlspecialchars($pconfig['radiusserveracctport']);?>">
437
                      <br>
438
                      Enter the IP address, RADIUS port, and RADIUS accounting port of the RADIUS server.</td>
439
                </tr>
440
                <tr> 
441
                  <td width="22%" valign="top" class="vncell">RADIUS shared secret</td>
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                  <td width="78%" valign="top" class="vtable">
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                      <input name="radiussecret" type="password" class="formfld pwd" id="radiussecret" size="20" value="<?=htmlspecialchars($pconfig['radiussecret']);?>">
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                      <br>
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                      Enter the shared secret that will be used to authenticate 
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                      to the RADIUS server.</td>
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                </tr>
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                <tr> 
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                  <td width="22%" valign="top" class="vncell">Secondary RADIUS server </td>
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                  <td width="78%" class="vtable">
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                      <input name="radiusserver2" type="text" class="formfld unknown" id="radiusserver2" size="20" value="<?=htmlspecialchars($pconfig['radiusserver2']);?>">
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                      <input name="radiusserver2port" type="text" class="formfld unknown" id="radiusserver2port" size="4" value="<?=htmlspecialchars($pconfig['radiusserver2port']);?>">
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                      <input name="radiusserver2acctport" type="text" class="formfld unknown" id="radiusserver2acctport" size="4" value="<?=htmlspecialchars($pconfig['radiusserver2acctport']);?>">
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                      <br>
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                      Enter the IP address, RADIUS port, and RADIUS accounting port of the RADIUS server.</td>
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                </tr>
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                <tr> 
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                  <td width="22%" valign="top" class="vncell">Secondary RADIUS shared secret</td>
459
                  <td width="78%" valign="top" class="vtable">
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                      <input name="radiussecret2" type="password" class="formfld pwd" id="radiussecret2" size="20" value="<?=htmlspecialchars($pconfig['radiussecret2']);?>">
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                      <br>
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                      Enter the shared secret that will be used to authenticate 
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                      to the secondary RADIUS server.</td>
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                </tr>
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                <tr> 
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                  <td height="16" colspan="2" valign="top"></td>
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                </tr>
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                <tr> 
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                  <td width="22%" valign="middle">&nbsp;</td>
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                  <td width="78%" class="vtable"> 
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                    <input name="req128" type="checkbox" id="req128" value="yes" <?php if ($pconfig['req128']) echo "checked"; ?>> 
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                    <strong>Require 128-bit encryption</strong><br>
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                    When set, only 128-bit encryption will be accepted. Otherwise 
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                    40-bit and 56-bit encryption will be accepted as well. Note that 
475
                    encryption will always be forced on PPTP connections (i.e. 
476
                    unencrypted connections will not be accepted).</td>
477
                </tr>
478
                <tr> 
479
                  <td width="22%" valign="top">&nbsp;</td>
480
                  <td width="78%"> 
481
                    <input name="Submit" type="submit" class="formbtn" value="Save" onclick="enable_change(true)"> 
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                  </td>
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                </tr>
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                <tr> 
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                  <td width="22%" valign="top">&nbsp;</td>
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                  <td width="78%"><span class="vexpl"><span class="red"><strong>Note:<br>
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                    </strong></span>don't forget to <a href="firewall_rules.php?if=pptp">add a firewall rule</a> to permit 
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                    traffic from PPTP clients!</span></td>
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                </tr>
490
              </table>
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</div>
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			</td>
493
	</tr>
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</table>
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</form>
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<script language="JavaScript">
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<!--
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enable_change(false);
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//-->
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</script>
501
<?php include("fend.inc"); ?>
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</body>
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</html>
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