Intrusion Detection System (IDS) : is a bypass deployment that monitors traffic for attacks Intrusion
Prevention System (IPS) : is an in-line connection
Intrusion detection provides a means of identifying and therefore reacting to attacks on the system. Detecting an attack is one thing, stopping it is another. At this time, the highest level of IT security action is to prevent attacks and possible disasters; and IDS often can only bring a little bit of this function.
Therefore, the extension of the function of the intrusion detection system produces an intrusion prevention system (IPS) . The lack of current defense capabilities drives the birth of this new security product, which is called an intrusion prevention system.
IDS and IPS comparison add link description
Comparison and Difference Between IPS vs IDS, Firewall vs WAF
