Node-http-proxy: "Direct IP access not allowed" when reverse proxying to CloudFlare domain

[requiredfield]

The following code successfully creates a reverse proxy server on localhost:8000 which reverse proxies to httpbin.org:

var httpProxy = require('http-proxy');
httpProxy.createProxyServer({target: 'http://httpbin.org'}).listen(8000);

However, if you change http://httpbin.org to any CloudFlare-enabled site (including http://www.cloudflare.com itself), you get "Error 1003 Direct IP access not allowed". Is there some way to configure the proxy server so it can successfully front CloudFlare-enabled sites? Sorry if I'm missing something obvious.

[requiredfield]

Never mind, seem to have figured it out:

httpProxy.createServer({changeOrigin: true, target: 'http://www.cloudflare.com'}).listen(8000);

[idanii]

Hey, I know it's been 5 years, But it's somehow directing me to the URL instead of staying on the proxy.
Weird. Do you have any idea why?