When do I try to use proxy_set_header for modify request header nothing happens. I don't understand why. I use proxy_set_header in location context location ~* /GadgetServices { proxy_pass https://csw_backend_upstream; proxy_no_cache 1; proxy_cache_bypass 1; proxy_set_header X-UWF-FinesseHost "server_name:8445"; add_header Strict-Transport-Security "by viachaslau - Other discussion