How to stop varnish response when it's got bad request

[Nguyen Thang Long]

Hi,

 

I have a problem with botnet, I can detect bad request to my server using
varnish cache.

Currently, I set varnish return error 403 when it's got bad request, but
it's also got more bandwidth to responses (> 200Mbps)

So, I want to varnish drop bad requests and not response to client.

Help needed , Thanks !

 

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