It sounds like you are connecting from a university, one that does not want you connecting to game servers from your PC. If there are computer labs/lan cafes or somesuch nearby or on campus you might want to try downloading from those, or having a friend or family member download it for you and put it onto a CD or USB drive.
You have confused different problems of mine. I am having problem downloading the client as well.
And yes, i use a university network, but it did not block my connection as i was able to connect before with no problem. And when a adderess is blocked by my university it displays a message citing the reason why it is blocked. That isn't the case here. Here i amn unable to connect to the patch server, while earlier i was able to.