How to avoid "HTTP/1.1 999 Request denied" response from LinkedIn?

I'm making request to LinkedIn page and receiving "HTTP/1.1 999 Request denied" response. I use AWS/EC-2 and get this response. On localhost everything works fine.

This is sample of my code to get html-code of the page.

<?php
error_reporting(E_ALL);
$url= 'https://www.linkedin.com/pulse/5-essential-strategies-digital-michelle';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$response = curl_exec($ch);
$info = curl_getinfo($ch);
curl_close($ch);
var_dump($response);
var_dump($info); 

I don't need whole page content, just meta-tags (title, og-tags).