Summary

In this chapter, we went through different network monitoring and security protocols and tools. We started by discussing the most common protocol used in the monitoring world, SNMP, Simple Network Monitoring Protocol. We discussed how it works, its key benefits, its security-related issues, and common terminologies used while working on this protocol. We then moved to another type of protocol used to monitor the data packets flow in your network. There are different vendor-based variations of this protocol; what we discussed here is developed by Cisco and called Netflow.

Then, we discussed the different monitoring applications that will help you not only store the network-monitoring logs and related data, but also represent then in a graphical manner. We started off by discussing a free, open source tool named Nagios. We discussed how it works and its key benefits. We then moved on to the fully configured Linux-based distribution that comes with a bunch of tools and utilities, giving...