Uhm... where do you live? Maybe it's a problem with my load balancing implementation, can you try with http://diego.linuxsystems.it/ which doesn't have any kind of load bal? It's htpassword protected, so you should just see the login.
Also, can you resolve the name? 'host linuxsystems.it' or 'dig +short linuxsystems.it'
Thank you for reporting.
My entire network has an interconnected and centralized banning system, if your ip does something wrong in a server you will be banned from my entire network. I have disabled it now, but it may have been the problem...