ExpressJS sessions with cookies

Im trying to use cookies to stablish a user session with ExpressJS 4.2 and cookier-parser but all the documentation that I found is for Expressjs 3.x or older.

Can someone point me in the right direction whith this?

Doc or code snippet will be appreciated.

Thanks in advance!

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I want to use PassportJS to authenticate local users with MongoDB, everything works fine excepts this route (ensureAuthenticatad always redirect to /, even when the user/pass is found in MongoDB

// reusable middleware
function ensureAuthenticated(req,res,next) {
    if(req.isAuthenticated()) {return next();}
        res.redirect('/'); // if failed...
    }


router.get('/panel', ensureAuthenticated,function(req, res){

    res.render('panel', {obj: testArr});

});

And thats because ensureAuthenticated cant find active cookies.

My app.js configuration is this:

var express      = require('express');
var path         = require('path');
var favicon      = require('static-favicon');
var logger       = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser   = require('body-parser');
var passport     = require('passport')
var mongoose     = require('mongoose');
var flash        = require('connect-flash');


//Routes
//=====================================================================
var routes = require('./routes/index');
var admin  = require('./routes/admin');
var panel  = require('./routes/panel');



//Express configuration
//======================================================================
var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

/*app.use(favicon());*/
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded());
app.use(cookieParser('secret'));
app.use(flash());
app.use(passport.initialize());
app.use(passport.session());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', routes);
app.use('/', admin);