[gila]

I don't know too much about web whatnots but couldn't this be done through virtualhosts? like say ip/other domains go to nothing or another place, domain.tld/subd.domain.tld goes to the main website?

Or am I mistaken and this circumvents that?

[tlrobinson]

Sure, if he wanted to block it completely. Or he could just do the redirect with a simple check of the Host header.