No way to stop them? (Score 1)

I've been using Linux for a few years now but am currently setting up a web server which is failrly new to me. As a newbie it's bound to have many security holes until i've finished reading the books :-) Even then i know it won't be secure. So, is there really no way to stop these attacks? if not, what measures can a sysadmin take to at least minimalise the impact od DoS attacks?