Now days we are in the era where all the routine activities whether it is financial, medical, shopping, travel, food lodging everything is facilitates by the applications or apps runs by internet. It becomes essential part of our life. But with the ease always comes with difficulty. Here attacks are very common on the internet. Multiple IPS and IDS systems, firewalls, antivirus software's are used to prevent the data from attacks, but these are not enough. To make the cyber security more powerful deep learning approaches are combined with the cyber security approaches. In this article we have discussed different methods and developments in intrusion detection systems in the recent years.