Crazy, we're used to probation periods here with a short notice time, that protects both sides. I assume you have to negotiate any notice period for being fired, or do you simply get no statutory notice period?
Usually, there is no notice required from either side except in the case of mass layoffs (two weeks are expected out of politeness, but aren't legally required). That can be changed by a contract, but that usually doesn't happen for anyone but high-level executives.