I have set up a load balancer with SSL termination. Behind this I have set up an Node Express server using NGinx as a reverse proxy to allow traffic from port 80 to redirect to my Express server running on port 4000. I have set this up using the NGINXConfig tool, config found here
Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
Oddly, when I had this set up with HTTPS between my NGinx proxy and the loadbalancer (without SSL Termination on the load balancer) this worked fine and I did not see CORS errors.
I assume this is down to the
/etc/nginx/nginxconfig.io/security.conf file created by the NGINXConfig tool and the fact that the connection goes from HTTPS to HTTP, however I do not know what the correct secure config here should be and was wondering if anyone could help out?
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