如何从部署在 AWS Elastic beanstalk 上的 node.js express 应用程序获取客户端 ip？

Question

I am using elastic beanstalk with ngnix proxy server. my application code was on node.js express framework. I am trying to access client ip via following code

 var ip = event.headers['x-forwarded-for'] || event.connection.remoteAddress || event.socket.remoteAddress || event.connection.socket.remoteAddress;

but i always getting same client ip for all incoming request. I think it will be the proxy server's ip address.

How to access real client address from my application???

Answer 1

I defer with @austince, the Client IP will be the first entry in the list for Elastic Beanstalk.

Example :

X-Forwarded-For: 182.12.12.123, 78.13.13.123

In case anyone, come looking for example code, here is what I have used in my project.

const _ = require('lodash');
const ipAddress = _.split(req.header('X-Forwarded-For'), ',');
ipadd = _.trim(_.first(ipAddress));

Answer 2

Here's the guide from AWS: https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/x-forwarded-headers.html#x-forwarded-for

X-Forwarded-For works, but is sometimes a list of IPs that have been hit along the way. The Client IP should be the first entry in the list for Elastic Beanstalk.

Ex :

X-Forwarded-For: client-ip-address, ip-address-1, ip-address-2