How to use outside of Vagrant Box?

This is working fine (both with Laravel and Lumen) when using homestead and running php artisan dump-server inside of the Vagrant box. How do I configure it to run from outside of the Vagrant box, but listen to the server inside?

I tried changing config 'host' => 'tcp://192.168.10.8:9912' but I get error stream_socket_server(): unable to connect to tcp://192.168.10.8:9912 (Can't assign requested address)

Thanks