You can contact your provider and they can work with their upstream to blackhole the traffic before it reaches your server. If they're a decent provider, they'l

You can contact your provider and they can work with their upstream to blackhole the traffic before it reaches your server. If they're a decent provider, they'll have protections in place to mitigate it before you really notice it. Based on some of your comments, it sounds like you're really asking is "Is there anything I can do to mitigate it myself?" and my answer to that is: Not really. Once the traffic hits your host, it's hitting your host no matter what, even if you shut off the web server or firewall the port. Traffic is cheap for criminals, so they can essentially send down whatever throughput is needed for the job.