In this paper we present a low cost yet robust DDoS detection method to identify all classes of DDoS attacks. Our method attempts to detect DDoS attack by monitoring the deviation of the count of unique source IPs and the count of source IPs whose transmission rate is higher than a given threshold value. Unlike other similar existing methods, our method does not need to maintain a list of sourc...

Modern all-IP networks, which transfer telephony, multimedia and data use mainly as signalling protocol the Session Initiation Protocol (SIP). These networks are exposed to various types of attacks, and among them, a DDoS attack can result particularly dangerous, because it can be directed against the SIP signalling system. A shield can be implemented only after the detection of an attack, henc...

Denial of Service (DoS) or Distributed Denial of Service (DDoS) is a powerful attack which prevents the system from providing services to its legitimate users. Several approaches exist to filter network-level attacks, but application-level attacks are harder to detect at the firewall. Filtering at application level can be computationally expensive and difficult to scale, while still creating bo...

A Distributed Denial of Service (DDoS) attack occurs when large amounts traffic from hundreds, thousands, or even millions other computers are routed to a network server crash the system and disrupt its function. These attacks commonly used shut down websites applications temporarily. Such problems often need be addressed with models that can manage time information contained in flows. In this ...

Distributed denial-of-service attacks (DDoS attacks) are intrusions into computing systems of the Internet. Their purpose is to make Internet inaccessible for users. DDoS attack consist sending many requests a certain resource at same time. As result, server cannot withstand network load. In such situation, provider must determine moment when begins and change traffic management strategy. Detec...

Today’s evolving cyber security threats demand new, modern, and cognitive computing approaches to network security systems. In the early years of the Internet, a simple packet inspection firewall was adequate to stop the then-contemporary attacks, such as Denial of Service (DoS), ports scans, and phishing. Since then, DoS has evolved to include Distributed Denial of Service (DDoS) attacks, espe...