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→Firewall rules update
We will now be '''installing, configuring and running a DNS server on our host'''. In most networks, the gateway would '''not''' also be a DNS server,
but if we places placed ours on a separate virtual machine we would need that VM to always be running in order for the other VMs to retrieve updates, install software, or even communicate with each other.
== Preparation ==
# You will need to update the firewall on '''host''' to allow <u>incoming</u> connections to '''port 53 for both UDP and TCP''' (i.e. the protocol and port that DNS uses).
# After you have updated your firewall, save your iptables rules.
# <b>Once you rules are saved, restart libvirtd to ensure NAT and forwarding rules are re-added.</b>
'''NOTE:''' You could just disable the firewall '''but that is a poor workaround!''' You are expected to be able to handle configuration (such as this) at this point in this course.
