My website is currently on HTTP only. The route to my website is like this: DNS (Route53) -> Server (Amazon EC2 running LEMP stack and WordPress).
Now I'm trying setting up TLS encryption on the website. I've decided to make a certificate on ACM and use it for a new load balancer. The route will be: DNS -> Load Balancer (with HTTPS listener) -> Server (still HTTP).
I've successfully created the load balancer. Health check passed (Ping target:
HTTP:80/license.txt). I update the DNS to point to the load balancer.
As the certificate is for
www version of the site, I've configured NGINX to force
www and updated WordPress URL (
Now the site is giving out Error 503 (Back-end server is at capacity). Is there anything to be done on server or load balancer?