Trouble creating SSL cert for nginx

I’m sure I’m doing something stupid here. But I followed the guidance from DO to create an SSL cert for my nginx-hosted domain:

https://www.digitalocean.com/community/articles/how-to-create-a-ssl-certificate-on-nginx-for-ubuntu-12-04

But whenever I fire up nginx, anything served off of port 80 is fine, but when it hit the same URL with HTTPS, nothing. No errors. Nothing in the logs. Just nothing.

Here is the snippet I’m using. Certs are definitely on the path mentioned. Any idea what I could be doing wrong?

server { listen 443; server_name example.com; root /var/www/example.com; index index.html index.php;

ssl on;
ssl_certificate /etc/nginx/ssl/server.crt;
ssl_certificate_key /etc/nginx/ssl/server.key;

}