I was creating reverse proxy to openshift cloud(with TLS: Edge) without any issue with below configuration:

"server {
listen 28097;
server_name localhost;

location / {
proxy_pass https://openshift.private.cloud.com;
proxy_ssl_verify off;
proxy_ssl_session_reuse on;
proxy_temp_file_write_size 64k;
proxy_connect_timeout 10080s;
proxy_send_timeout 10080;
proxy_read_timeout 10080;
proxy_buffer_size 64k;
proxy_buffers 16 32k;
proxy_busy_buffers_size 64k;
proxy_request_buffering off;
proxy_buffering off;
proxy_http_version 1.1;
server_tokens off;
}
}
"

but recently openshift developers created new app with TLS passthrough and below configuration doesn't work. When I try to do curl I get "HTTP/1.1 503 Service Unavailable".

I don't know what could be the issue. Does anyone have experience with that?