How to create and modify custom .xml file under /etc/firewalld/services for adding certain ports with firewalld in RHEL?

Solution Verified - Updated -

Issue

  • FirewallD: Custom xml under /etc/firewalld/services is not adding ports.
  • How to modify custom created .xml service in firewalld ?
  • How to add multiple ports as a service to a particular zone in firewalld ?
  • Enable multiple ports ports for a specific zone in firewalld.

Environment

  • Red Hat Enterprise Linux (RHEL) 7, 8, 9, 10
  • FirewallD

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