Yesterday took all day for me to set up ELK, it seems to be working because within my VM I can open the browser and go to Kibana web interface. Besides that, I don't know how else to check to see if it is actually working.
I also downloaded and am using nginx. I shifted my focus to trying to connect to Kibana Web Interface/Logstash and Elasticsearch from my host. The VM I am connecting to is a vmware remote console, so it isn't installed locally.
I already tried changing the nginx file, I tried changing network.host to 0.0.0.0 and many other.