As of last week, someone decided they were going to attack my web server using Apachebench. What the attacker is doing is simply running a program that makes thousands of Apachebench requests on my server all day long, effectively making the server useless.
My question is, is there any way I can block/deny or filter Apachebench requests on my web server?
Thanks in advance for any help you guys can provide.

Is the attack from one specific IP address? Have you considered blocking the IP already?

You should copy the "hits" into a text file and submit/report it to the service provider as well.