Hello,
My problem thus follows:
I am running a server which allows users to connect on UDP, not TCP.
There is a certain hacker, whom I have the IP of, who keeps crashing the server. I simply want to block him from accessing my box at all. I added him to the hosts.deny file, but am not sure if this will do the trick. (Since it seems that hosts.deny,allow is for NFS) Is there a better way to accomplish this?

Thank you,
Robert

Perhaps a simple firewall rule would take care of your problem?

What OS are you using?

As Neo said you should install a firewall.

A good firewall to run is IPCop or smotthwall (I run IPCop at home). These are also good to use as they can run on a old machine (something like a 75mhz machine), so if you got a old machine you can use download IPCop or Smoothwall.

IPCop (latest) is only about a 45Mb ISO.

You may also use iptables or ipchains

Well i'm running RedHat linux 7.3. The server is co-located so an .iso CD isn't really much help.... I was thinking of using ipchains or something but don't really know how.