limit_req per subnet?

[Grant]

> That is why you cache the request. DoS or in your case DDoS since multiple
> are involved Caching backend responses and having Nginx serve a cached
> response even for 1 second that cached response can be valid for it will
> save your day.


That would be a big project because it would mean rewriting some of
the functionality of my backend.  I'm looking for something that can
be implemented independently of the backend, but that doesn't seem to
exist in nginx.

- Grant