Question

I have an Express app running behind Nginx, so when I try to get the user’s IP, I always get 127.0.0.1 instead of the real one, which is set by Nginx in the X-Real-IP header. How do I get this header? Is there a way to have it via the socket object?

The code would be basically like that:

io.sockets.on( 'connection', function( socket ) {

    var ip = /* ??? */;

    /* do something with the IP…

       … some stuff …

     */
});

Answer 1

To get the IP when you’re running behind NGINX or another proxy:

var ip = req.header('x-forwarded-for') || req.connection.remoteAddress;

or for Socket.IO

client.handshake.headers['x-forwarded-for'] || client.handshake.address.address;

From: http://www.hacksparrow.com/node-js-get-ip-address.html