Getting client ip when ftp-srv runs behind of nginx load balancer

[alirezavafaee]

I've created a nodejs app to test getting client ip behind of loadbalancer and I got this result:

~# node tcp.js
TCP Server is running on port 7070.
CONNECTED: 127.0.0.1:35122
DATA 127.0.0.1: PROXY TCP4 214.12.133.55 172.18.0.3 46984 21

I need to get the client ip (214.12.133.55)
I used to get it by:
connection.log.fields.ip
But now I don't know how can I get client ip.

Do you have any solution?

[mmemfox]

Got the same problem, but with rathole reverse proxy.

ftp-srv/src/commands/registration/pasv.js

Lines 12 to 24 in 89bd13d

	this.connector = new PassiveConnector(this);
	return this.connector.setupServer()
	.then((server) => {
	const {port} = server.address();
	let pasvAddress = this.server.options.pasv_url;
	if (typeof pasvAddress === "function") {
	return Promise.try(() => pasvAddress(this.ip))
	.then((address) => ({address, port}));
	}
	// Allow connecting from local
	if (isLocalIP(this.ip)) pasvAddress = this.ip;
	return {address: pasvAddress, port};
	})

We need to avoid the local IP check, to do so, let's make our pasv_url a function.

// problem:
    pasv_url: url,
// change to this in your code:
    pasv_url: ()=>url,