Possibilities of DoS/DDOS Attacks and the use of Filtering and Rate Limiting Mechanisms to Alleviate Message Security

In today’s networks one major problem, especially for Service Providers, is related to various attacks either active or passive. Denial of Services (DoS) is one of the most difficult to detect and stop. Denial of Service (DoS) and its derivative, Distributed Denial of Service (DDoS) are some of the most common attacks. There are many types of DoS: Buffer Overflow, SYN attacks, teardrop attack, smurf attack, viruses or even physical infrastructure attacks. Their intended goal is to disrupt the normal operation of networks and their main components: network equipment and computers connected to them. This paper is summary of a literature study with regards to the possibilities of DoS/DDoS attacks and defense mechanisms against it. Keywords-IP spoofing, DDoS attack, Message security.