Detecting network intrusions via a statistical analysis of network packet characteristics

With the growing threat of abuse of network resources, it becomes increasingly important to be able to detect malformed packets on a network and estimate the damage they fan cause. In this paper, we collect and analyze all of the IP and TCP packets seen on a network that either violate existing standards or should not appear in modern internets. Our goal is to determine what these suspicions packets mean and evaluate what proportion of such packets can cause actual damage. Thus, we divide unusual packets obtained during our experiments into several categories depending on the severity of their consequences, including indirect consequences as a result of information gathering, and show the results. The traces analyzed were gathered at Ohio University´s main Internet link, providing a massive amount of statistical data