does anyone have a nice script to handle brute force ssh attacks?

My public linux box is constantly being hit by brute force attacks.

I found alot of people saying they were being hit by attacks on google, but other than changing the port, i havn't seen any solutions.

I think the best bet would be a simple script that monitors log files and parses out obvious attacks and firewalls it off, if someone else has one, that'd save me alot of time, google hasn't been the best help in this regard.

Otherwise i'll just make my own.

Thanks

Edit: Since this post only had like 4 or 5 actual useful responses, and now down to just flaming, i'm closing the comments.