Block user agent

I have been using Comodo Firewall as a server firewall and has been doing pretty good job in 3 years now.
Thanks for a gret product. Have been enable to block many Ddos attacks etc…

Is there anyway that I could block certain USER AGENT that is browsing/crawling my site?

I have to get this done within the firewall not htaccess etc…

edited all caps part in title to normal case. Eric

That’s not possible.

too bad.