How can I prevent my father from entering my room without permission?

So when my dad comes into my room, he never knocks and just storms in and sees the mess and gives me an internet break as punishment. I'm supposed to go to bed at 11 p.m., which I think is too early because I'm 21, and my brother and sister never get an internet break….

Can my father forbid me from using the internet while I'm studying?

Hi, My father temporarily forbids me from using the internet (it's available from 6 a.m. to 10 a.m. and 3 p.m. to 8 p.m.), even though I'm already 24 and a student. The problem is that I can't successfully complete my studies under these circumstances, and my studies are significantly delayed. I don't use the…