Closing port on too many requests
In this day and age a persons server cannot seem to be left alone and just do what it was meant to do.I currenty have a few dedicated servers arround the world and through my past have always come to some sort of problems with script kiddies and DDOS attacks and I am sure there has to be a way to solve my problem as others must experience this aswell.
For Example.
Server 1 is running with all the following ports open 110,25,21,80,23,5469(Proftpd),6667(ircd) and the o/s is RH9
say for example the server started getting attacked on port 21 could there be any way of getting the server t deny any requests to and from that port till the attacks die down ?