Getting the message "iptables: Firewall modules are not loaded"

Solution Verified - Updated -

Issue

  • When listing iptable rules, getting the following message:

    WARNING: Module on not found.
    WARNING: Module off not found.
    
  • After checking the status of iptables service, getting the following message:

    iptables: Firewall modules are not loaded
    

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

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