w.Header().Set("Access-Control-Allow-Origin", "*")
		}
		if globalDNSConfig == nil || !globalBucketFederation ||
			guessIsHealthCheckReq(r) || guessIsMetricsReq(r) ||
			guessIsRPCReq(r) || guessIsLoginSTSReq(r) || isAdminReq(r) || isKMSReq(r) {
			h.ServeHTTP(w, r)
			return
		}

		bucket, object := request2BucketObjectName(r)

		// Requests in federated setups for STS type calls which are