Hi, We are currently using "limit_req_zone $binary_remote_addr" for rate limiting. However, some of our users are connecting from more than one IP address, using clients running on computer grids. We wanted to do request rate limiting by authenticated user (in addition to the existing one by $binary_remote_addr). Is there any way we could do request rate limiting based on authenticated user? We use Kerberos for authentication, using ngx_http_auth_spnego_module (https://github.com/stnoonan/spnego-http-auth-nginx-module). We tried "limit_req_zone $remote_user zone=user:10m rate=20r/s;" and "limit_req zone=user burst=20;" but the key was apparently empty - all requests, from all users, were getting limited (all bunched under one key). However, interestingly, $remote_user is passed fine to the upstream using "proxy_set_header X-Forwarded-User $remote_user;"... Apparently $remote_user only works for request limiting when using basic authentication. Thank you for any suggestions/pointers.
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