$5\mathrm{.}1$ Task $3.$A: Experiment with the Connection Tracking

To support stateful firewalls, we need to be able to track connections. This is achieved by the conntrack

mechanism inside the kernel. In this task, we will conduct experiments related to this module, and get

familiar with the connection tracking mechanism. In our experiment, we will check the connection tracking

information on the router container. This can be done using the following command:

# conntrack $-$L

The goal of the task is to use a series of experiments to help students understand the connection concept

in this tracking mechanism, especially for the ICMP and UDP protocols, because unlike TCP$,$ they do not

have connections. Please conduct the following experiments. For each experiment, please describe your

observation, along with your explanation