How to allow site access to specific ip on node express server?

Question

JavaScript

Under this I found the module express-ipfilter .
the description says:

// Init dependencies 
var express = require('express')
    , ipfilter = require('express-ipfilter')
    , app = express.createServer()
    ;
 
// Whitelist the following IPs 
var ips = ['127.0.0.1'];
 
// Create the server 
app.use(ipfilter(ips, {mode: 'allow'}));
app.listen(3000);

but since I'm new and just starting to figure it all out, I'm not yet able to tie it to my express :(
I have 2 files : app.js and www.js
app :

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');



var routes = require('./routes/index');
var users = require('./routes/users');

var app = express();

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

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

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

…..

and www :

var app = require('../app');
var debug = require('debug')('dataBase:server');
var http = require('http');


/**
 * Get port from environment and store in Express.
 */
var serverIP = '10.10.12.120'
var port = normalizePort(process.env.PORT || '3007');
app.set('port', port);

/**
 * Create HTTP server.
 */

var server = http.createServer(app);

/**
 * Listen on provided port, on all network interfaces.
 */

server.listen(port,serverIP);
server.on('error', onError);
server.on('listening', onListening);
…….

Can you please tell me how to install this module?
Or maybe it is not needed at all, and there is another, much more correct way?

Answer 1

This can be done anywhere where there is access to the application instance (in the code, this is the `app` variable).
It is better to connect all middleware in one place, i.e. in your case it is `app.js`

Answer 2

express stands for nginx in the sale, in nginx it is easily configured.

Answer 3

I also found this on the net:
Returns the ip of the client that is requesting the page.
And if in routes it is trivial to check this parameter, and send certain content to a certain client. Will this be correct?