It’s not a fritzbox-problem. It’s an issue with your ISP - this is a pretty common restriction with german cable internet.
Maybe someone more familiar with cable might be able to help you out. Or just give your ISP a call about it 
It’s not a fritzbox-problem. It’s an issue with your ISP - this is a pretty common restriction with german cable internet.
Maybe someone more familiar with cable might be able to help you out. Or just give your ISP a call about it