Forum: NGINX Problems with PHP authentication imap/smtp proxy

Announcement (2017-05-07): is now read-only since I unfortunately do not have the time to support and maintain the forum any more. Please see and for other Rails- und Ruby-related community platforms.
cybermass (Guest)
on 2014-04-13 21:26
(Received via mailing list)
I managed to write my php auth script but still having problems
Also this is what I see in the logs:
[error] 22014#0: *3234 recv() failed (111: Connection refused) while in
auth state, client: back.end.ip server:, login:

Also do I call this script with the following auth_http line? I never
anything listening on 9000. Where is this 9000 coming from? I just see
everyone using it:



$db = new PDO('mysql:host=back.end.ip;dbname=server;charset=utf8',
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);

if (!isset($_SERVER["HTTP_AUTH_USER"] ) ||
)) {
$username = $_SERVER["HTTP_AUTH_USER"] ;
$userpass = $_SERVER["HTTP_AUTH_PASS"] ;
$protocol = $_SERVER["HTTP_AUTH_PROTOCOL"] ;

$backend_port = "";
if ($protocol == "imap") {
  $backend_port = 993;
if ($protocol == "smtp") {
  $backend_port = 25;
// nginx likes ip address so if your
// application gives back hostname, convert it to ip address here
$backend_ip = "back.end.ip";
// Authenticate the user or fail
if (!authuser($username,$userpass)) {
// Get the server for this user if we have reached so far
$userserver = getmailserver($username);

// Get the ip address of the server
// We are assuming that your backend returns hostname
// We try to get the ip else return what we got back

$server_ip = (isset($backend_ip[$userserver]))?$backend_ip[$userserver]
// Pass!
pass($server_ip, $backend_port);


function authuser($user,$pass) {
    global $db;
    $stmt = $db->prepare("SELECT password FROM users WHERE email=:email
LIMIT 1");
    $dbpass = $stmt->fetchColumn();
    return ($dbpass === $pass);

function getmailserver($user) {
    return $backend_ip;

function fail(){
  header("Auth-Status: Invalid login or password");

function pass($server,$port) {
  header("Auth-Status: OK");
  header("Auth-Server: $server");
  header("Auth-Port: $port");

nginx.conf (my http section is fine as I use it for my backend apache)

mail {
  #auth_http  unix:/path/socket:/cgi-bin/auth;

  proxy     on;

  ssl_prefer_server_ciphers  on;
  ssl_protocols              TLSv1 SSLv3;
  ssl_ciphers                HIGH:!ADH:!MD5:@STRENGTH;
  ssl_session_cache          shared:TLSSL:16m;
  ssl_session_timeout        10m;
  ssl_certificate            ssl/ug-mail.crt;
  ssl_certificate_key        ssl/private/ug-mail.key;

  imap_capabilities "IMAP4rev1 UIDPLUS";
  smtp_capabilities "PIPELINING 8BITMIME DSN";

#  smtp_auth plain login;
#  imap_auth plain login;

  server {
    listen 25;
    protocol smtp;
    timeout 120000;

  server {
    listen 8825;
    protocol smtp;
    starttls on;

  server {
    listen 993;
    protocol imap;
    ssl on;

Posted at Nginx Forum:,249256,249256#msg-249256
Maxim Dounin (Guest)
on 2014-04-14 13:06
(Received via mailing list)

On Sun, Apr 13, 2014 at 03:25:35PM -0400, cybermass wrote:

> auth_http;

It's just a random port number, which is expected to be used by
a HTTP server which is capable of running your auth script.

Maxim Dounin
88c0dae13d60c5a245b6fd5d7da643b3?d=identicon&s=25 Shawn Za (shawn82)
on 2014-04-14 19:47
Im still not able to call this script. Is there something I need to
define in the http { section for php? I have not done that. I tried
adding another server { block inside the http block to listen to but still cant call my php script. nginx does not know
how to use php. I do have php5-fpm installed and running. Any help would
be appreciated. I just need to be able to use my auth.php with
auth_http. Thanks.
This topic is locked and can not be replied to.