RHV: How to customize the Host's firewall rules?

Solution Verified - Updated -

Issue

  • I need to customize RHV firewall (iptables) rules.
  • How do I save the rules so that they persist across a reboot?
  • This needs to be done in a manageable way.

Environment

  • Red Hat Virtualization 3.5, 3.6, 4.x
  • Red Hat Virtualization Host
  • Red Hat Enterprise Linux Host

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