How do I setup logging in the iptables firewall?

Solution Verified - Updated -

Issue

  • How do I setup logging in the iptables firewall?
  • How to use iptables to log incoming and outgoing connections?
  • Red Hat Enterprise Linux does not offer a built in feature to track incoming and outgoing connections.

Environment

  • Red Hat Enterprise Linux 6, 7, 8, 9
  • iptables firewall or firewalld direct rules

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