Openshift Cluster behind Reverse Proxy

Question

We have an Openshift cluster in IBM Cloud that is in private endpoint. In order for us to connect to the master, we decided to use a Reverse Proxy server.

From the reverse proxy, we can curl the https://console.subdomain.domain.com/

But it gives us a 505 Bad Gateway response.

Here is the configuration we use:

server {
    listen 80;
    server_name subdomain.domain.com;
    location / {
        proxy_pass https://console.subdomain.domain.com/;
    }
}