Merge pull request #205 from mkuron/forwardinghosts
Add a "Forwarding Hosts" feature so messages from certain servers are never rejectedmaster
André Peters
GitHub
commit
29983dfe8d
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@ -23,6 +23,7 @@ RUN apt-get install -y --no-install-recommends supervisor \
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gnupg \
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python-gpgme \
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sudo \
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curl \
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dirmngr
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RUN addgroup --system --gid 600 zeyple
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@ -24,7 +24,7 @@ milter_default_action = accept
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milter_protocol = 6
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minimal_backoff_time = 300s
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plaintext_reject_code = 550
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postscreen_access_list = permit_mynetworks, cidr:/opt/postfix/conf/postscreen_access.cidr
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postscreen_access_list = permit_mynetworks, cidr:/opt/postfix/conf/postscreen_access.cidr, tcp:127.0.0.1:10027
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postscreen_bare_newline_enable = no
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postscreen_blacklist_action = drop
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postscreen_cache_cleanup_interval = 24h
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@ -55,3 +55,5 @@ zeyple unix - n n - - pipe
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-o smtpd_recipient_restrictions=permit_mynetworks,reject
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-o mynetworks=127.0.0.0/8
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-o smtpd_authorized_xforward_hosts=127.0.0.0/8
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127.0.0.1:10027 inet n n n - 0 spawn user=nobody argv=/opt/postfix/conf/whitelist_forwardinghosts.sh
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@ -0,0 +1,12 @@
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#!/bin/bash
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while read QUERY; do
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QUERY=($QUERY)
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if [ "${QUERY[0]}" != "get" ]; then
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echo "500 dunno"
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continue
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fi
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result=$(curl -s http://172.22.1.251:8081/forwardinghosts.php?host=${QUERY[1]})
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logger -t whitelist_forwardinghosts -p mail.info "Look up ${QUERY[1]} on whitelist, result $result"
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echo $result
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done
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@ -0,0 +1,56 @@
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<?php
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header('Content-Type: text/plain');
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require_once "vars.inc.php";
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ini_set('error_reporting', 0);
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function in_net($addr, $net)
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{
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$net = explode('/', $net);
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if (count($net) > 1)
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$mask = $net[1];
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$net = inet_pton($net[0]);
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$addr = inet_pton($addr);
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$length = strlen($net); // 4 for IPv4, 16 for IPv6
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if (strlen($net) != strlen($addr))
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return FALSE;
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if (!isset($mask))
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$mask = $length * 8;
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$addr_bin = '';
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$net_bin = '';
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for ($i = 0; $i < $length; ++$i)
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{
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$addr_bin .= str_pad(decbin(ord(substr($addr, $i, $i+1))), 8, '0', STR_PAD_LEFT);
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$net_bin .= str_pad(decbin(ord(substr($net, $i, $i+1))), 8, '0', STR_PAD_LEFT);
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}
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return substr($addr_bin, 0, $mask) == substr($net_bin, 0, $mask);
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}
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$dsn = $database_type . ':host=' . $database_host . ';dbname=' . $database_name;
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$opt = [
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
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PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
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PDO::ATTR_EMULATE_PREPARES => false,
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];
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try {
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$pdo = new PDO($dsn, $database_user, $database_pass, $opt);
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$stmt = $pdo->query("SELECT host FROM `forwarding_hosts`");
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$networks = $stmt->fetchAll(PDO::FETCH_COLUMN);
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foreach ($networks as $network)
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{
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if (in_net($_GET['host'], $network))
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{
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echo '200 permit';
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exit;
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}
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}
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echo '200 dunno';
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}
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catch (PDOException $e) {
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echo '200 dunno';
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exit;
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}
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?>
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@ -32,6 +32,35 @@ catch (PDOException $e) {
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?>
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settings {
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<?php
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try {
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$stmt = $pdo->query("SELECT `host` FROM `forwarding_hosts`");
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$rows = $stmt->fetchAll(PDO::FETCH_COLUMN);
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}
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catch (PDOException $e) {
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$rows = array();
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}
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if ($rows)
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{
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?>
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whitelist_forwarding_hosts {
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priority = high;
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<?php
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foreach ($rows as $host) {
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echo "\t\t" . 'ip = "' . $host . '";' . "\n";
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}
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?>
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apply "default" {
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actions {
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reject = 999.9;
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}
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}
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symbols [
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"WHITELIST_FORWARDING_HOST"
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]
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}
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<?php
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}
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$stmt = $pdo->query("SELECT DISTINCT `object` FROM `filterconf` WHERE `option` = 'highspamlevel' OR `option` = 'lowspamlevel'");
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$rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
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@ -183,6 +183,8 @@ $tfa_data = get_tfa();
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</div>
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<h4><span class="glyphicon glyphicon-wrench" aria-hidden="true"></span> <?=$lang['admin']['configuration'];?></h4>
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<div class="panel-group" id="accordion_access">
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<div class="panel panel-default">
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<div class="panel-heading"><?=$lang['admin']['dkim_keys'];?></div>
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<div id="collapseDKIM" class="panel-collapse">
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@ -298,6 +300,77 @@ $tfa_data = get_tfa();
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</div>
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</div>
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</div>
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<div class="panel panel-default">
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<div style="cursor:pointer;" class="panel-heading" data-toggle="collapse" data-parent="#accordion_access" data-target="#collapseForwardingHosts">
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<span class="accordion-toggle"><?=$lang['admin']['forwarding_hosts'];?></span>
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</div>
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<div id="collapseForwardingHosts" class="panel-collapse collapse">
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<div class="panel-body">
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<p style="margin-bottom:40px"><?=$lang['admin']['forwarding_hosts_hint'];?></p>
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<form method="post">
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<div class="table-responsive">
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<table class="table table-striped" id="forwardinghoststable">
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<thead>
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<tr>
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<th style="min-width: 100px;"><?=$lang['edit']['host'];?></th>
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<th style="min-width: 100px;"><?=$lang['edit']['source'];?></th>
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<th style="text-align: right; min-width: 200px;"><?=$lang['admin']['action'];?></th>
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</tr>
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</thead>
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<tbody>
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<?php
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$forwarding_hosts = get_forwarding_hosts();
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if ($forwarding_hosts) {
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foreach ($forwarding_hosts as $host) {
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$source = $host->source;
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$host = $host->host;
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?>
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<tr id="data">
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<td><?=htmlspecialchars(strtolower($host));?></td>
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<td><?=htmlspecialchars(strtolower($source));?></td>
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<td style="text-align: right;">
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<div class="btn-group">
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<a href="delete.php?forwardinghost=<?=$host;?>" class="btn btn-xs btn-danger"><span class="glyphicon glyphicon-trash"></span> <?=$lang['admin']['remove'];?></a>
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</div>
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</td>
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</td>
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</tr>
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<?php
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}
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} else {
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?>
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<tr id="no-data"><td colspan="4" style="text-align: center; font-style: italic;"><?=$lang['admin']['no_record'];?></td></tr>
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<?php
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}
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?>
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</tbody>
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</table>
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</div>
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</form>
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<small>
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<legend><?=$lang['admin']['add_forwarding_host'];?></legend>
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<p style="margin-bottom:10px"><?=$lang['admin']['forwarding_hosts_add_hint'];?></p>
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<form class="form-horizontal" role="form" method="post">
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<div class="form-group">
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<label class="control-label col-sm-2" for="hostname"><?=$lang['edit']['host'];?>:</label>
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<div class="col-sm-10">
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<input type="text" class="form-control" name="hostname" id="hostname" required>
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</div>
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</div>
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<div class="form-group">
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<div class="col-sm-offset-2 col-sm-10">
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<button type="submit" name="add_forwarding_host" class="btn btn-default"><?=$lang['admin']['add'];?></button>
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</div>
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</div>
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</form>
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</small>
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</div>
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</div>
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</div>
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</div>
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</div> <!-- /container -->
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<script type='text/javascript'>
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<?php
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@ -105,6 +105,23 @@ if (isset($_SESSION['mailcow_cc_role']) && ($_SESSION['mailcow_cc_role'] == "adm
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</form>
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<?php
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}
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// DELETE FORWARDING HOST
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elseif (isset($_GET["forwardinghost"]) &&
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!empty($_GET["forwardinghost"]) &&
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$_SESSION['mailcow_cc_role'] == "admin") {
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$host = $_GET["forwardinghost"];
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?>
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<div class="alert alert-warning" role="alert"><?=sprintf($lang['delete']['remove_forwardinghost_warning'], htmlspecialchars($_GET["forwardinghost"]));?></div>
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<form class="form-horizontal" role="form" method="post" action="/admin.php">
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<input type="hidden" name="forwardinghost" value="<?=htmlspecialchars($host);?>">
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<div class="form-group">
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<div class="col-sm-offset-1 col-sm-10">
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<button type="submit" name="delete_forwarding_host" class="btn btn-default btn-sm"><?=$lang['delete']['remove_button'];?></button>
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</div>
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</div>
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</form>
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<?php
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}
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// DELETE MAILBOX
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elseif (isset($_GET["mailbox"]) &&
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filter_var($_GET["mailbox"], FILTER_VALIDATE_EMAIL) &&
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@ -4932,4 +4932,93 @@ function get_u2f_registrations($username) {
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$sel->execute(array($username));
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return $sel->fetchAll(PDO::FETCH_OBJ);
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}
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function get_forwarding_hosts() {
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global $pdo;
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$sel = $pdo->prepare("SELECT host, source FROM `forwarding_hosts`");
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$sel->execute();
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return $sel->fetchAll(PDO::FETCH_OBJ);
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}
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function add_forwarding_host($postarray) {
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require_once 'spf.inc.php';
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global $pdo;
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global $lang;
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if ($_SESSION['mailcow_cc_role'] != "admin") {
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$_SESSION['return'] = array(
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'type' => 'danger',
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'msg' => sprintf($lang['danger']['access_denied'])
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);
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return false;
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}
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$source = $postarray['hostname'];
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$host = $postarray['hostname'];
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$hosts = array();
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if (preg_match('/^[0-9a-fA-F:\/]+$/', $host)) { // IPv6 address
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$hosts = array($host);
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}
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elseif (preg_match('/^[0-9\.\/]+$/', $host)) { // IPv4 address
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$hosts = array($host);
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}
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else {
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$hosts = get_outgoing_hosts_best_guess($host);
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}
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if (!$hosts)
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{
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$_SESSION['return'] = array(
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'type' => 'danger',
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'msg' => 'Invalid host specified: '. htmlspecialchars($host)
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);
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return false;
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}
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foreach ($hosts as $host) {
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if ($source == $host)
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$source = '';
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try {
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$stmt = $pdo->prepare("INSERT IGNORE INTO `forwarding_hosts` (`host`, `source`) VALUES (:host, :source)");
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$stmt->execute(array(
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':host' => $host,
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':source' => $source,
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));
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}
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catch (PDOException $e) {
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$_SESSION['return'] = array(
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'type' => 'danger',
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'msg' => 'MySQL: '.$e
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);
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return false;
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}
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}
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$_SESSION['return'] = array(
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'type' => 'success',
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'msg' => sprintf($lang['success']['forwarding_host_added'], htmlspecialchars(implode(', ', $hosts)))
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);
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}
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function delete_forwarding_host($postarray) {
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global $pdo;
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global $lang;
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if ($_SESSION['mailcow_cc_role'] != "admin") {
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$_SESSION['return'] = array(
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'type' => 'danger',
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'msg' => sprintf($lang['danger']['access_denied'])
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);
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return false;
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}
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$host = $postarray['forwardinghost'];
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try {
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$stmt = $pdo->prepare("DELETE FROM `forwarding_hosts` WHERE `host` = :host");
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$stmt->execute(array(
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':host' => $host,
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));
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}
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catch (PDOException $e) {
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$_SESSION['return'] = array(
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'type' => 'danger',
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'msg' => 'MySQL: '.$e
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);
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return false;
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}
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$_SESSION['return'] = array(
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'type' => 'success',
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'msg' => sprintf($lang['success']['forwarding_host_removed'], htmlspecialchars($host))
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);
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}
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?>
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@ -263,6 +263,18 @@ function init_db_schema() {
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),
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"attr" => "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 ROW_FORMAT=DYNAMIC"
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),
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"forwarding_hosts" => array(
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"cols" => array(
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"host" => "VARCHAR(255) NOT NULL",
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"source" => "VARCHAR(255) NOT NULL"
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),
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"keys" => array(
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"primary" => array(
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"" => array("host")
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),
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),
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"attr" => "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 ROW_FORMAT=DYNAMIC"
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),
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"sogo_acl" => array(
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"cols" => array(
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"c_folder_id" => "INT NOT NULL",
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|
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@ -0,0 +1,127 @@
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<?php
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function get_spf_allowed_hosts($domain)
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{
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$hosts = array();
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$records = dns_get_record($domain, DNS_TXT);
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foreach ($records as $record)
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{
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$txt = explode(' ', $record['entries'][0]);
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if (array_shift($txt) != 'v=spf1') // only handle SPF records
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continue;
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foreach ($txt as $mech)
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{
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$qual = substr($mech, 0, 1);
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if ($qual == '-' || $qual == '~') // only handle pass or neutral records
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continue(2);
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|
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if ($qual == '+' || $qual == '?')
|
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$mech = substr($mech, 1); // remove the qualifier
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if (strpos($mech, '=') !== FALSE) // handle a modifier
|
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{
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$mod = explode('=', $mech);
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if ($mod[0] == 'redirect') // handle a redirect
|
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{
|
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$hosts = get_spf_allowed_hosts($mod[1]);
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return $hosts;
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}
|
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}
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else
|
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{
|
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unset($cidr);
|
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if (strpos($mech, ':') !== FALSE) // handle a domain specification
|
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{
|
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$split = explode(':', $mech);
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$mech = array_shift($split);
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$domain = implode(':', $split);
|
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if (strpos($domain, '/') !== FALSE) // remove CIDR specification
|
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{
|
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$split = explode('/', $domain);
|
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$domain = $split[0];
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$cidr = $split[1];
|
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}
|
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}
|
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|
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$new_hosts = array();
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if ($mech == 'include') // handle an inclusion
|
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{
|
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$new_hosts = get_spf_allowed_hosts($domain);
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}
|
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elseif ($mech == 'a') // handle a mechanism
|
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{
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$new_hosts = get_a_hosts($domain);
|
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}
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elseif ($mech == 'mx') // handle mx mechanism
|
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{
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$new_hosts = get_mx_hosts($domain);
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}
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elseif ($mech == 'ip4' || $mech == 'ip6') // handle ip mechanism
|
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{
|
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$new_hosts = array($domain);
|
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}
|
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|
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if (isset($cidr)) // add CIDR specification if present
|
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{
|
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foreach ($new_hosts as &$host)
|
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{
|
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$host .= '/' . $cidr;
|
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}
|
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unset($host);
|
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}
|
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|
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$hosts = array_unique(array_merge($hosts,$new_hosts), SORT_REGULAR);
|
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}
|
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}
|
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}
|
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return $hosts;
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}
|
||||
|
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function get_mx_hosts($domain)
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{
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$hosts = array();
|
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|
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$mx_records = dns_get_record($domain, DNS_MX);
|
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foreach ($mx_records as $mx_record)
|
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{
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$new_hosts = get_a_hosts($mx_record['target']);
|
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$hosts = array_unique(array_merge($hosts,$new_hosts), SORT_REGULAR);
|
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}
|
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|
||||
return $hosts;
|
||||
}
|
||||
|
||||
function get_a_hosts($domain)
|
||||
{
|
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$hosts = array();
|
||||
|
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$a_records = dns_get_record($domain, DNS_A);
|
||||
foreach ($a_records as $a_record)
|
||||
{
|
||||
$hosts[] = $a_record['ip'];
|
||||
}
|
||||
$a_records = dns_get_record($domain, DNS_AAAA);
|
||||
foreach ($a_records as $a_record)
|
||||
{
|
||||
$hosts[] = $a_record['ipv6'];
|
||||
}
|
||||
|
||||
return $hosts;
|
||||
}
|
||||
|
||||
function get_outgoing_hosts_best_guess($domain)
|
||||
{
|
||||
// try the SPF record to get hosts that are allowed to send outgoing mails for this domain
|
||||
$hosts = get_spf_allowed_hosts($domain);
|
||||
if ($hosts) return $hosts;
|
||||
|
||||
// try the MX record to get mail servers for this domain
|
||||
$hosts = get_mx_hosts($domain);
|
||||
if ($hosts) return $hosts;
|
||||
|
||||
// fall back to the A record to get the host name for this domain
|
||||
return get_a_hosts($domain);
|
||||
}
|
||||
?>
|
||||
|
|
@ -72,6 +72,12 @@ if (isset($_SESSION['mailcow_cc_role']) && $_SESSION['mailcow_cc_role'] == "admi
|
|||
if (isset($_POST["delete_domain_admin"])) {
|
||||
delete_domain_admin($_POST);
|
||||
}
|
||||
if (isset($_POST["add_forwarding_host"])) {
|
||||
add_forwarding_host($_POST);
|
||||
}
|
||||
if (isset($_POST["delete_forwarding_host"])) {
|
||||
delete_forwarding_host($_POST);
|
||||
}
|
||||
}
|
||||
if (isset($_SESSION['mailcow_cc_role']) && $_SESSION['mailcow_cc_role'] == "user") {
|
||||
if (isset($_POST["edit_user_account"])) {
|
||||
|
|
|
|||
|
|
@ -450,11 +450,20 @@ $lang['admin']['unchanged_if_empty'] = 'Unverändert, wenn leer';
|
|||
$lang['admin']['yes'] = '✔';
|
||||
$lang['admin']['no'] = '✘';
|
||||
$lang['admin']['access'] = 'Zugang';
|
||||
$lang['admin']['invalid_max_msg_size'] = 'Invalid max. message size'; // NEEDS TRANSLATION
|
||||
$lang['admin']['invalid_max_msg_size'] = 'Ungültige maximale Nachrichtengröße';
|
||||
$lang['admin']['site_not_found'] = 'Kann mailcow Site-Konfiguration nicht finden';
|
||||
$lang['admin']['public_folder_empty'] = 'Public folder name must not be empty'; // NEEDS TRANSLATION
|
||||
$lang['admin']['public_folder_empty'] = 'Name des öffentlichen Ordners darf nicht leer sein';
|
||||
$lang['admin']['set_rr_failed'] = 'Kann Postfix Restriktionen nicht setzen';
|
||||
$lang['admin']['no_record'] = 'Kein Eintrag';
|
||||
$lang['admin']['filter_table'] = 'Tabelle Filtern';
|
||||
$lang['admin']['empty'] = 'Keine Einträge vorhanden';
|
||||
$lang['admin']['forwarding_hosts'] = 'Weiterleitungs-Hosts';
|
||||
$lang['admin']['forwarding_hosts_hint'] = 'Eingehende Nachrichten werden von den hier gelisteten Hosts bedingungslos akzeptiert. Diese Hosts werden dann nicht mit DNSBLs abgeglichen oder Greylisting unterworfen. Von ihnen empfangener Spam wird nie abgelehnt und immer in den Spam-Ordner einsortiert. Die übliche Verwendung für diese Funktion ist, um Mailserver anzugeben, auf denen eine Weiterleitung zu Ihrem Mailcow-Server eingerichtet wurde.';
|
||||
$lang['admin']['forwarding_hosts_add_hint'] = 'Sie können entweder IPv4/IPv6-Adressen, Netzwerke in CIDR-Notation, Hostnamen (die zu IP-Adressen aufgelöst werden), oder Domainnamen (die zu IP-Adressen aufgelöst werden, indem ihr SPF-Record abgefragt wird oder, in dessen Abwesenheit, ihre MX-Records) angeben.';
|
||||
$lang['edit']['host'] = 'Host';
|
||||
$lang['edit']['source'] = 'Quelle';
|
||||
$lang['admin']['add_forwarding_host'] = 'Weiterleitungs-Host hinzufügen';
|
||||
$lang['delete']['remove_forwardinghost_warning'] = '<b>Warnung:</b> Sie entfernen den Weiterleitungs-Host <b>%s</b>!';
|
||||
$lang['success']['forwarding_host_removed'] = "Weiterleitungs-Host %s wurde entfernt";
|
||||
$lang['success']['forwarding_host_added'] = "Weiterleitungs-Host %s wurde hinzugefügt";
|
||||
?>
|
||||
|
|
|
|||
|
|
@ -468,4 +468,13 @@ $lang['admin']['set_rr_failed'] = 'Cannot set Postfix restrictions';
|
|||
$lang['admin']['no_record'] = 'No record';
|
||||
$lang['admin']['filter_table'] = 'Filter table';
|
||||
$lang['admin']['empty'] = 'No results';
|
||||
$lang['admin']['forwarding_hosts'] = 'Forwarding Hosts';
|
||||
$lang['admin']['forwarding_hosts_hint'] = 'Incoming messages are unconditionally accepted from any hosts listed here. These hosts are then not checked against DNSBLs or subjected to greylisting. Spam received from them is never rejected and always filed into the Junk folder. The most common use for this is to specify mail servers on which you have set up a rule that forwards incoming emails to your Mailcow server.';
|
||||
$lang['admin']['forwarding_hosts_add_hint'] = 'You can either specify IPv4/IPv6 addresses, networks in CIDR notation, host names (which will be resolved to IP addresses), or domain names (which will be resolved to IP addresses by querying SPF records or, in their absence, MX records).';
|
||||
$lang['edit']['host'] = 'Host';
|
||||
$lang['edit']['source'] = 'Source';
|
||||
$lang['admin']['add_forwarding_host'] = 'Add Forwarding Host';
|
||||
$lang['delete']['remove_forwardinghost_warning'] = '<b>Warning:</b> You are about to remove the forwarding host <b>%s</b>!';
|
||||
$lang['success']['forwarding_host_removed'] = "Forwarding host %s has been removed";
|
||||
$lang['success']['forwarding_host_added'] = "Forwarding host %s has been added";
|
||||
?>
|
||||
|
|
|
|||
Loading…
Reference in New Issue