How to prevent DOS attacks on my http server which written in node.js?

Question

using node.js, the net module for building a tcp server which can hande http requests.

I would like to prevent dos attacks so what I have done is somthing like this:

Answer 1

from the API if it helps anyone, should be used smartly :

 server.pause(msecs)

Stop accepting connections for the given number of milliseconds (default is one second). This could be useful for throttling new connections against DoS attacks or other oversubscription.