limit-req and greedy UAs

Grant emailgrant at
Tue Sep 13 16:07:42 UTC 2016

> limit_req works with multiple connections, it is usually configured per IP
> using $binary_remote_addr. See
> - you can use variables to set the key to whatever you like.
> limit_req generally helps protect eg your backend against request floods
> from a single IP and any amount of connections. limit_conn protects against
> excessive connections tying up resources on the webserver itself.

Perfectly understood.  Thank you Richard.

- Grant

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