This article focus to explain magnitude of Network Security forensics. Network security consists of the provisions in addition to policies adopted by way of a network administrator in order to avoid and monitor unauthorized access, misuse, modification, or denial of any computer network in addition to network-accessible resources. Network security will involve the authorization of access to data in the network, which is controlled from the network administrator. There are essential security concepts that are located in information available on the web that need to help maintained through network security forensics. These types of concepts are ethics, confidentiality and availability. Systems of all types can receive the benefits of network security forensics. Systems including embedded programs, large distribution programs, control systems and human factors can all possibly be protected.