iRule to thwart FTP brute force attacks?

You could certainly write something that had this kind of functionality. It would be a little bit involved, but not horribly difficult. I don't know of an example already on DevCentral that does exactly what you're asking, though.

 

 

There should be some great examples in the forums and codeshare to help you get started. Something like this one has most of the logic and flow done for you already: Click here

 

 

Colin