Why multicast communication is not taking place between two hosts when the iptables or firewalld is running ?

Solution Verified - Updated -

Issue

  • Multicast communication is not working between two host when iptables are running on the system.
  • When iptables are stopped, multicast communication takes place.

Environment

  • Red Hat Enterprise Linux (All Versions).
  • iptables.service.
  • FirewallD.service.

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