Nginx will overwrites your origin server headers https://trac.nginx.org/nginx/ticket/538 https://trac.nginx.org/nginx/ticket/538 so for these stats it would get

Nginx will overwrites your origin server headers https://trac.nginx.org/nginx/ticket/538 https://trac.nginx.org/nginx/ticket/538 so for these stats it would get picked up as nginx even though its only forwarding