Add services to open ports
To open default ports for predefined services through firewalld on your MicroShift instance, you can use the firewall-cmd command. Add each service with the --add-service option.
Procedure
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Optional: You can view all predefined services in firewalld by running the following command
$ sudo firewall-cmd --get-services -
To open a service that you want on a default port, run the following example command:
$ sudo firewall-cmd --add-service=mdns