Why can't a PHP-FPM script make a file_get_contents( 'https://...' ) request?

Question

PHP

The bottom line is that it costs PHP7.1 The pro
user is created and added to the www-data group For him, the /home/pro pro folder owns the folder with permissions 755 The /home folder owns root In the pool settings user = pro; chroot=/home; listen = 10.0.0.9:9000 In php.ini url_open is allowed Nginx from another server proxies the request to eth1 vk.com) If I open it through a browser, I get the error file_get_contents cant resolve host..



I read on the stack that there could be a problem in dns - it seems to me that it is unlikely. Then nothing would work.
For the second day I've been freaking out
. What could be the reason?
Thank you!

Answer 1

https://serverfault.com/a/613174