varnish limit rate request for seconds with cloudflare

limit_rate.vcl

## ## Not complete default.vcl code
# Install https://github.com/varnish/varnish-modules

import vsthrottle;

# If I want to implement limitation to any request (do not declare req.http.X-Actual-IP again in other subsequent subroutines)
sub vcl_recv {
        # GET REAL IP USER from proxy CLOUDFLARE
        set req.http.X-Actual-IP = regsub(req.http.X-Forwarded-For, "[, ].*$", "");
        if(vsthrottle.is_denied(req.http.X-Actual-IP, 50, 5s, 60s)) {
                # Client has exceeded 50 reqs per 5s.
                # When this happens, block altogether for the next 60s.
                return (synth(429, "Too Many Requests"));
        }
}


# If I want to implement limitation to requests that should be cached, but not found
sub vcl_miss {
        # GET REAL IP USER from proxy CLOUDFLARE
        set req.http.X-Actual-IP = regsub(req.http.X-Forwarded-For, "[, ].*$", "");
        if(vsthrottle.is_denied(req.http.X-Actual-IP, 50, 5s, 60s)) {
                # Client has exceeded 50 reqs per 5s.
                # When this happens, block altogether for the next 60s.
                return (synth(429, "Too Many Requests"));
        }
}