Minimum nginx reverse proxy configuration to access MPS/IntelliJ webserver outside of localhost. Do not use this config with untrusted clients connecting to the IDE.

nginx.conf

events {
    worker_connections 1024;
}
http {
    server {
        listen 63399;
        location / {
            proxy_set_header Referer "";
            proxy_set_header Origin "";
            proxy_pass http://localhost:63320;
        }

    }
}