How to apply proxy_set_header only for certain IPs?

Question

Nginx

It is necessary to override the Authorization header for certain IP addresses, and skip all others with the passed header. Can this be done via config?

Answer 1

if ($remote_addr = 194.172.2.115) {
  set $phead $http_authorization;
    }

Further on the config
proxy_set_header Authorization $phead;