limit_conn_zone applied to Proxy_Pass (outgoing requests)

[aflexzor]

Hello!

I have an nginx reverse proxy it has a series of filters against DDoS
attacks.

As a last resort I need to make sure that I NEVER send more than x
concurrent requests to the backend server (Proxy_pass)

Is it possible to apply limit_conn_zone for outgoing requests? If so could
i have an example? Thanks.

Alex
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