1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
|
#!/usr/local/bin/php
<?php
/* $Id$ */
/*
firewall_nat_edit.php
part of m0n0wall (http://m0n0.ch/wall)
Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
require("guiconfig.inc");
if (!is_array($config['nat']['rule'])) {
$config['nat']['rule'] = array();
}
//nat_rules_sort();
$a_nat = &$config['nat']['rule'];
$id = $_GET['id'];
if (isset($_POST['id']))
$id = $_POST['id'];
if (isset($id) && $a_nat[$id]) {
$pconfig['extaddr'] = $a_nat[$id]['external-address'];
$pconfig['proto'] = $a_nat[$id]['protocol'];
list($pconfig['beginport'],$pconfig['endport']) = explode("-", $a_nat[$id]['external-port']);
$pconfig['localip'] = $a_nat[$id]['target'];
$pconfig['localbeginport'] = $a_nat[$id]['local-port'];
$pconfig['descr'] = $a_nat[$id]['descr'];
$pconfig['interface'] = $a_nat[$id]['interface'];
if (!$pconfig['interface'])
$pconfig['interface'] = "wan";
} else {
$pconfig['interface'] = "wan";
}
if ($_POST) {
if ($_POST['beginport_cust'] && !$_POST['beginport'])
$_POST['beginport'] = $_POST['beginport_cust'];
if ($_POST['endport_cust'] && !$_POST['endport'])
$_POST['endport'] = $_POST['endport_cust'];
if ($_POST['localbeginport_cust'] && !$_POST['localbeginport'])
$_POST['localbeginport'] = $_POST['localbeginport_cust'];
if (!$_POST['endport'])
$_POST['endport'] = $_POST['beginport'];
unset($input_errors);
$pconfig = $_POST;
/* input validation */
$reqdfields = explode(" ", "interface proto beginport localip localbeginport");
$reqdfieldsn = explode(",", "Interface,Protocol,Start port,NAT IP,Local port");
do_input_validation($_POST, $reqdfields, $reqdfieldsn, &$input_errors);
if (($_POST['beginport'] && !is_ipaddroralias($_POST['beginport']) && !is_port($_POST['beginport']))) {
$input_errors[] = "The start port must be an integer between 1 and 65535.";
}
if (($_POST['endport'] && !is_ipaddroralias($_POST['endport']) && !is_port($_POST['endport']))) {
$input_errors[] = "The end port must be an integer between 1 and 65535.";
}
if (($_POST['localbeginport'] && !is_ipaddroralias($_POST['localbeginport']) && !is_port($_POST['localbeginport']))) {
$input_errors[] = "The local port must be an integer between 1 and 65535.";
}
if (($_POST['localip'] && !is_ipaddroralias($_POST['localip']))) {
$input_errors[] = "A valid NAT IP address or host alias must be specified.";
}
if ($_POST['beginport'] > $_POST['endport']) {
/* swap */
$tmp = $_POST['endport'];
$_POST['endport'] = $_POST['beginport'];
$_POST['beginport'] = $tmp;
}
if (!$input_errors) {
if (($_POST['endport'] - $_POST['beginport'] + $_POST['localbeginport']) > 65535)
$input_errors[] = "The target port range must be an integer between 1 and 65535.";
}
/* check for overlaps */
foreach ($a_nat as $natent) {
if (isset($id) && ($a_nat[$id]) && ($a_nat[$id] === $natent))
continue;
if ($natent['interface'] != $_POST['interface'])
continue;
if ($natent['external-address'] != $_POST['extaddr'])
continue;
list($begp,$endp) = explode("-", $natent['external-port']);
if (!$endp)
$endp = $begp;
if (!( (($_POST['beginport'] < $begp) && ($_POST['endport'] < $begp))
|| (($_POST['beginport'] > $endp) && ($_POST['endport'] > $endp)))) {
$input_errors[] = "The external port range overlaps with an existing entry.";
break;
}
}
if (!$input_errors) {
$natent = array();
if ($_POST['extaddr'])
$natent['external-address'] = $_POST['extaddr'];
$natent['protocol'] = $_POST['proto'];
if ($_POST['beginport'] == $_POST['endport'])
$natent['external-port'] = $_POST['beginport'];
else
$natent['external-port'] = $_POST['beginport'] . "-" . $_POST['endport'];
$natent['target'] = $_POST['localip'];
$natent['local-port'] = $_POST['localbeginport'];
$natent['interface'] = $_POST['interface'];
$natent['descr'] = $_POST['descr'];
if (isset($id) && $a_nat[$id])
$a_nat[$id] = $natent;
else
$a_nat[] = $natent;
touch($d_natconfdirty_path);
if ($_POST['autoadd']) {
/* auto-generate a matching firewall rule */
$filterent = array();
$filterent['interface'] = $_POST['interface'];
$filterent['protocol'] = $_POST['proto'];
$filterent['source']['any'] = "";
$filterent['destination']['address'] = $_POST['localip'];
$dstpfrom = $_POST['localbeginport'];
$dstpto = $dstpfrom + $_POST['endport'] - $_POST['beginport'];
if ($dstpfrom == $dstpto)
$filterent['destination']['port'] = $dstpfrom;
else
$filterent['destination']['port'] = $dstpfrom . "-" . $dstpto;
$filterent['descr'] = "NAT " . $_POST['descr'];
$config['filter']['rule'][] = $filterent;
touch($d_filterconfdirty_path);
}
write_config();
header("Location: firewall_nat.php");
exit;
}
}
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title><?=gentitle("Firewall: NAT: Edit inbound");?></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link href="gui.css" rel="stylesheet" type="text/css">
<script language="JavaScript">
<!--
function ext_change() {
if (document.iform.beginport.selectedIndex == 0) {
document.iform.beginport_cust.disabled = 0;
} else {
document.iform.beginport_cust.value = "";
document.iform.beginport_cust.disabled = 1;
}
if (document.iform.endport.selectedIndex == 0) {
document.iform.endport_cust.disabled = 0;
} else {
document.iform.endport_cust.value = "";
document.iform.endport_cust.disabled = 1;
}
if (document.iform.localbeginport.selectedIndex == 0) {
document.iform.localbeginport_cust.disabled = 0;
} else {
document.iform.localbeginport_cust.value = "";
document.iform.localbeginport_cust.disabled = 1;
}
}
function ext_rep_change() {
document.iform.endport.selectedIndex = document.iform.beginport.selectedIndex;
document.iform.localbeginport.selectedIndex = document.iform.beginport.selectedIndex;
}
//-->
</script>
</head>
<body link="#0000CC" vlink="#0000CC" alink="#0000CC">
<?php include("fbegin.inc"); ?>
<p class="pgtitle">Firewall: NAT: Edit inbound</p>
<?php if ($input_errors) print_input_errors($input_errors); ?>
<form action="firewall_nat_edit.php" method="post" name="iform" id="iform">
<table width="100%" border="0" cellpadding="6" cellspacing="0">
<tr>
<td width="22%" valign="top" class="vncellreq">Interface</td>
<td width="78%" class="vtable">
<select name="interface" class="formfld">
<?php
$interfaces = array('wan' => 'WAN', 'lan' => 'LAN');
for ($i = 1; isset($config['interfaces']['opt' . $i]); $i++) {
$interfaces['opt' . $i] = $config['interfaces']['opt' . $i]['descr'];
}
foreach ($interfaces as $iface => $ifacename): ?>
<option value="<?=$iface;?>" <?php if ($iface == $pconfig['interface']) echo "selected"; ?>>
<?=htmlspecialchars($ifacename);?>
</option>
<?php endforeach; ?>
</select><br>
<span class="vexpl">Choose which interface this rule applies to.<br>
Hint: in most cases, you'll want to use WAN here.</span></td>
</tr>
<tr>
<td width="22%" valign="top" class="vncellreq">External address</td>
<td width="78%" class="vtable">
<select name="extaddr" class="formfld">
<option value="" <?php if (!$pconfig['extaddr']) echo "selected"; ?>>Interface address</option>
<?php
if (is_array($config['nat']['servernat'])):
foreach ($config['nat']['servernat'] as $sn): ?>
<option value="<?=$sn['ipaddr'];?>" <?php if ($sn['ipaddr'] == $pconfig['extaddr']) echo "selected"; ?>><?=htmlspecialchars("{$sn['ipaddr']} ({$sn['descr']})");?></option>
<?php endforeach; endif; ?>
<option value="any"<?php if($pconfig['extaddr'] == "any" echo " selected"; ?>></option>
</select><br>
<span class="vexpl">
If you want this rule to apply to another IP address than the IP address of the interface chosen above,
select it here (you need to define IP addresses on the
<a href="firewall_nat_server.php">Server NAT</a> page first). Also note that if you are trying to redirect connections on the LAN select the "any" option.</span></td>
</tr>
<tr>
<td width="22%" valign="top" class="vncellreq">Protocol</td>
<td width="78%" class="vtable">
<select name="proto" class="formfld">
<?php $protocols = explode(" ", "TCP UDP TCP/UDP"); foreach ($protocols as $proto): ?>
<option value="<?=strtolower($proto);?>" <?php if (strtolower($proto) == $pconfig['proto']) echo "selected"; ?>><?=htmlspecialchars($proto);?></option>
<?php endforeach; ?>
</select> <br> <span class="vexpl">Choose which IP protocol
this rule should match.<br>
Hint: in most cases, you should specify <em>TCP</em> here.</span></td>
</tr>
<tr>
<td width="22%" valign="top" class="vncellreq">External port
range </td>
<td width="78%" class="vtable">
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td>from: </td>
<td><select name="beginport" class="formfld" onChange="ext_rep_change();ext_change()">
<option value="">(other)</option>
<?php $bfound = 0; foreach ($wkports as $wkport => $wkportdesc): ?>
<option value="<?=$wkport;?>" <?php if ($wkport == $pconfig['beginport']) {
echo "selected";
$bfound = 1;
}?>>
<?=htmlspecialchars($wkportdesc);?>
</option>
<?php endforeach; ?>
</select> <input autocomplete='off' onblur='actb_removedisp()' onkeypress='return (event.keyCode!=13);' onkeydown='actb_checkkey(event, this)' onkeyup='actb_tocomplete(this,event,addressarray);' class="formfldalias" name="beginport_cust" type="text" size="5" value="<?php if (!$bfound) echo $pconfig['beginport']; ?>"></td>
</tr>
<tr>
<td>to:</td>
<td><select name="endport" class="formfld" onChange="ext_change()">
<option value="">(other)</option>
<?php $bfound = 0; foreach ($wkports as $wkport => $wkportdesc): ?>
<option value="<?=$wkport;?>" <?php if ($wkport == $pconfig['endport']) {
echo "selected";
$bfound = 1;
}?>>
<?=htmlspecialchars($wkportdesc);?>
</option>
<?php endforeach; ?>
</select> <input class="formfldalias" autocomplete='off' onblur='actb_removedisp()' onkeypress='return (event.keyCode!=13);' onkeydown='actb_checkkey(event, this)' onkeyup='actb_tocomplete(this,event,addressarray);' name="beginport_cust" name="endport_cust" type="text" size="5" value="<?php if (!$bfound) echo $pconfig['endport']; ?>"></td>
</tr>
</table>
<br> <span class="vexpl">Specify the port or port range on
the firewall's external address for this mapping.<br>
Hint: you can leave the <em>'to'</em> field empty if you only
want to map a single port</span></td>
</tr>
<tr>
<td width="22%" valign="top" class="vncellreq">NAT IP</td>
<td width="78%" class="vtable">
<input autocomplete='off' onblur='actb_removedisp()' onkeypress='return (event.keyCode!=13);' onkeydown='actb_checkkey(event, this)' onkeyup='actb_tocomplete(this,event,addressarray);' name="localip" type="text" class="formfldalias" id="localip" size="20" value="<?=htmlspecialchars($pconfig['localip']);?>">
<br> <span class="vexpl">Enter the internal IP address of
the server on which you want to map the ports.<br>
e.g. <em>192.168.1.12</em></span></td>
</tr>
<tr>
<td width="22%" valign="top" class="vncellreq">Local port</td>
<td width="78%" class="vtable">
<select name="localbeginport" class="formfld" onChange="ext_change()">
<option value="">(other)</option>
<?php $bfound = 0; foreach ($wkports as $wkport => $wkportdesc): ?>
<option value="<?=$wkport;?>" <?php if ($wkport == $pconfig['localbeginport']) {
echo "selected";
$bfound = 1;
}?>>
<?=htmlspecialchars($wkportdesc);?>
</option>
<?php endforeach; ?>
</select> <input autocomplete='off' onblur='actb_removedisp()' onkeypress='return (event.keyCode!=13);' onkeydown='actb_checkkey(event, this)' onkeyup='actb_tocomplete(this,event,addressarray);' class="formfldalias" name="localbeginport_cust" type="text" size="5" value="<?php if (!$bfound) echo $pconfig['localbeginport']; ?>">
<br>
<span class="vexpl">Specify the port on the machine with the
IP address entered above. In case of a port range, specify
the beginning port of the range (the end port will be calculated
automatically).<br>
Hint: this is usually identical to the 'from' port above</span></td>
</tr>
<tr>
<td width="22%" valign="top" class="vncell">Description</td>
<td width="78%" class="vtable">
<input name="descr" type="text" class="formfld" id="descr" size="40" value="<?=htmlspecialchars($pconfig['descr']);?>">
<br> <span class="vexpl">You may enter a description here
for your reference (not parsed).</span></td>
</tr><?php if (!(isset($id) && $a_nat[$id])): ?>
<tr>
<td width="22%" valign="top"> </td>
<td width="78%">
<input name="autoadd" type="checkbox" id="autoadd" value="yes">
<strong>Auto-add a firewall rule to permit traffic through
this NAT rule</strong></td>
</tr><?php endif; ?>
<tr>
<td width="22%" valign="top"> </td>
<td width="78%">
<input name="Submit" type="submit" class="formbtn" value="Save"> <input type="button" class="formbtn" value="Cancel" onclick="history.back()">
<?php if (isset($id) && $a_nat[$id]): ?>
<input name="id" type="hidden" value="<?=$id;?>">
<?php endif; ?>
</td>
</tr>
</table>
</form>
<script language="JavaScript">
<!--
ext_change();
//-->
</script>
<?php
$isfirst = 0;
$aliases = "";
$addrisfirst = 0;
$aliasesaddr = "";
if($config['aliases']['alias'] <> "")
foreach($config['aliases']['alias'] as $alias_name) {
if(!stristr($alias_name['address'], ".")) {
if($isfirst == 1) $aliases .= ",";
$aliases .= "'" . $alias_name['name'] . "'";
$isfirst = 1;
} else {
if($addrisfirst == 1) $aliasesaddr .= ",";
$aliasesaddr .= "'" . $alias_name['name'] . "'";
$addrisfirst = 1;
}
}
?>
<script language="JavaScript">
<!--
var addressarray=new Array(<?php echo $aliasesaddr; ?>);
var customarray=new Array(<?php echo $aliases; ?>);
//-->
</script>
<script type="text/javascript" language="javascript" src="auto_complete_helper.js">
</script>
<?php include("fend.inc"); ?>
</body>
</html>
|