Problems with PHP authentication imap/smtp proxy

cybermass nginx-forum at
Sun Apr 13 19:25:35 UTC 2014

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 http
auth state, client: back.end.ip server:, login:
"user at"

Also do I call this script with the following auth_http line? I never see
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', 'user',
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);

if (!isset($_SERVER["HTTP_AUTH_USER"] ) || !isset($_SERVER["HTTP_AUTH_PASS"]
)) {
$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

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