barns.blog

I have now submitted the camera-ready version of the ISSA Paper. It will be published under the title An Evaluation of Scan-Detection Algorithms in Network Intrusion Detection Systems.

Abstract:

Network Intrusion Detection Systems are becoming more prevalent as devices to protect a network. However, the methods they use for some forms of detection are flawed. This paper builds upon existing research by van Riel and Irwin which illustrated these flaws in Snort and Bro’s scan-detection engines. Indeed, it has been ascertained that a number of different scanning techniques are not identified by either Snort or Bro.

This paper highlights current research into the improvement of these scan-detection algorithms and presents insight into how this research is being conducted at Rhodes University. This research will improve on the scan-detection engines in Snort and Bro, permitting them to be used in a production environment without fear of succumbing to the false negative problem which currently exists.

I have submitted my Work In Progress Paper for SATNAC, under the title of An Analysis of Network Scanning Traffic as it relates to Scan-Detection in Network Intrusion Detection Systems.

Abstract

Network Intrusion Detection is, in a modern network, a useful tool to detect a wide variety of malicious traffic. The ever present prevalence of scanning activity on the Internet is fair justification to warrant scan detection as a component of network intrusion detection. Whilst current systems are able to perform scan-detection, the methods they use are often flawed and exhibit an inability to detect scans in an efficient and scalable manner.

Existing research by van Riel and Irwin has illustrated a number of flaws present in the open source systems Snort and Bro. This paper builds on this by describing current research at Rhodes University in which these flaws are being addressed. In particular, this research will address the flaws in the scan-detection engines in Snort and Bro by developing new plug-ins for these systems which take into consideration the improvements which are identified over the course of the research.

Today was a little bit slow. I started off well by redoing this site, so that it would produce nifty things such as RSS feeds. Its now using WordPress.

I managed to get the Linux version of InetVis to work with my crafted Ethernet frames which was great. I then started creating tcpdumps of the different types of Nmap scans. These will be analysed with Snort, Bro and InetVis.

The following was done today:

• Reinstalled FreeBSD
• Installed Snort and Bro
• Installed other extras, like Nmap
• Learned about disc interfaces
• Fought with InetVis

I also got sidetracked into doing my final marking for this semester and having an aircon in the RUCUS room regassed.