Internet Performance Authorities spamming the site

[Acternaweb]

I have sites suchs as Keynote.com hitting my site day after day for quite a few months. They have not been hired to do so and are using a lot of bandwith. How can I block them from visiting my site.

Is there a universal code that if the spider is not from a search engine they are banned?

[Hope]

You might want to talk to your webhost to see if they have set up keynote for you. I know that our host did this for us. It was frustrating. I was finally able to shut it off.