#!/usr/local/bin/php . 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. */ $pgtitle = array("Firewall", "NAT", "Edit outbound mapping"); require("guiconfig.inc"); if (!is_array($config['nat']['advancedoutbound']['rule'])) $config['nat']['advancedoutbound']['rule'] = array(); $a_out = &$config['nat']['advancedoutbound']['rule']; nat_out_rules_sort(); $id = $_GET['id']; if (isset($_POST['id'])) $id = $_POST['id']; function network_to_pconfig($adr, &$padr, &$pmask, &$pnot) { if (isset($adr['any'])) $padr = "any"; else if ($adr['network']) { list($padr, $pmask) = explode("/", $adr['network']); if (!$pmask) $pmask = 32; } if (isset($adr['not'])) $pnot = 1; else $pnot = 0; } if (isset($id) && $a_out[$id]) { list($pconfig['source'],$pconfig['source_subnet']) = explode('/', $a_out[$id]['source']['network']); network_to_pconfig($a_out[$id]['destination'], $pconfig['destination'], $pconfig['destination_subnet'], $pconfig['destination_not']); $pconfig['target'] = $a_out[$id]['target']; $pconfig['interface'] = $a_out[$id]['interface']; if (!$pconfig['interface']) $pconfig['interface'] = "wan"; $pconfig['descr'] = $a_out[$id]['descr']; $pconfig['noportmap'] = isset($a_out[$id]['noportmap']); } else { $pconfig['source_subnet'] = 24; $pconfig['destination'] = "any"; $pconfig['destination_subnet'] = 24; $pconfig['interface'] = "wan"; $pconfig['noportmap'] = false; } if ($_POST) { if ($_POST['destination_type'] == "any") { $_POST['destination'] = "any"; $_POST['destination_subnet'] = 24; } unset($input_errors); $pconfig = $_POST; /* input validation */ $reqdfields = explode(" ", "interface source source_subnet destination destination_subnet"); $reqdfieldsn = explode(",", "Interface,Source,Source bit count,Destination,Destination bit count"); do_input_validation($_POST, $reqdfields, $reqdfieldsn, &$input_errors); if ($_POST['source'] && !is_ipaddr($_POST['source'])) { $input_errors[] = "A valid source must be specified."; } if ($_POST['source_subnet'] && !is_numericint($_POST['source_subnet'])) { $input_errors[] = "A valid source bit count must be specified."; } if ($_POST['destination_type'] != "any") { if ($_POST['destination'] && !is_ipaddr($_POST['destination'])) { $input_errors[] = "A valid destination must be specified."; } if ($_POST['destination_subnet'] && !is_numericint($_POST['destination_subnet'])) { $input_errors[] = "A valid destination bit count must be specified."; } } if ($_POST['target'] && !is_ipaddr($_POST['target'])) { $input_errors[] = "A valid target IP address must be specified."; } /* check for existing entries */ $osn = gen_subnet($_POST['source'], $_POST['source_subnet']) . "/" . $_POST['source_subnet']; if ($_POST['destination_type'] == "any") $ext = "any"; else $ext = gen_subnet($_POST['destination'], $_POST['destination_subnet']) . "/" . $_POST['destination_subnet']; if ($_POST['target']) { /* check for clashes with 1:1 NAT (Server NAT is OK) */ if (is_array($config['nat']['onetoone'])) { foreach ($config['nat']['onetoone'] as $natent) { if (check_subnets_overlap($_POST['target'], 32, $natent['external'], $natent['subnet'])) { $input_errors[] = "A 1:1 NAT mapping overlaps with the specified target IP address."; break; } } } } foreach ($a_out as $natent) { if (isset($id) && ($a_out[$id]) && ($a_out[$id] === $natent)) continue; if (!$natent['interface']) $natent['interface'] == "wan"; if (($natent['interface'] == $_POST['interface']) && ($natent['source']['network'] == $osn)) { if (isset($natent['destination']['not']) == isset($_POST['destination_not'])) { if ((isset($natent['destination']['any']) && ($ext == "any")) || ($natent['destination']['network'] == $ext)) { $input_errors[] = "There is already an outbound NAT rule with the specified settings."; break; } } } } if (!$input_errors) { $natent = array(); $natent['source']['network'] = $osn; $natent['descr'] = $_POST['descr']; $natent['target'] = $_POST['target']; $natent['interface'] = $_POST['interface']; $natent['noportmap'] = $_POST['noportmap'] ? true : false; if ($ext == "any") $natent['destination']['any'] = true; else $natent['destination']['network'] = $ext; if (isset($_POST['destination_not']) && $ext != "any") $natent['destination']['not'] = true; if (isset($id) && $a_out[$id]) $a_out[$id] = $natent; else $a_out[] = $natent; touch($d_natconfdirty_path); write_config(); header("Location: firewall_nat_out.php"); exit; } } ?>
Interface
Choose which interface this rule applies to.
Hint: in most cases, you'll want to use WAN here.
Source /
Enter the source network for the outbound NAT mapping.
Destination > not
Use this option to invert the sense of the match.

Type:  
Address:   /
  Enter the destination network for the outbound NAT mapping.
Target
Packets matching this rule will be mapped to the IP address given here. Leave blank to use the selected interface's IP address.
Portmap > Avoid port mapping
This option avoids remapping of the source port number for outbound packets whenever possible (i.e. when there is no other mapping for the same port). This may help with software that insists on the source ports being left unchanged when applying NAT (such as some IPsec VPN gateways, games and VoIP applications).
Description
You may enter a description here for your reference (not parsed).