This chapter discussed the need and use of a network protocol analyzer and an IDS in a honeypot environment. In order to use either of these tools, you need to be familiar with the OSI model and network protocol basics. Network protocol analyzers should be used to capture all traffic headed to and from the honeypot. IDSs should be used to alert the administrator and to identify well-known attacks. In this chapter, you learned about using two open-source tools that fulfill these needs: Ethereal and Snort.
Both monitoring tools should be attached to the honeypot network in such a way as to not alert the hacker. Chapter 10 will cover data-monitoring tools and techniques.