The best way to learn that is to practice.

Prior to beginning this lab verify network connectivity between your host and your VMs and record some numbers:

#* ssh [ip-of-vm]

To preempt some confusion let's start with this: several rules are automatically added for you because of the virtual network. As an exercise we'll figure out what those are exactly:

# You can use these tools to compare any two text files, they often come in handy. For the purpose of this lab notice that some iptables rules are added automatically by the libvirtd service.

We'll run some commands to practice and get a basic understanding of how the rules work.

# Delete related,established rule, try to do anything

# Restore defaults

= Your tasks =

And then overwrite the defaults with the current state of the firewall:

<source lang='bash'>/usr/libexec/iptables/iptables.init save</source>

= Completing the Lab =