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FireWall in Centos 7 masked
How to resolve the error message below
Failed to issue method call: Unit firewalld.service is masked.
The main reason a service is masked is to prevent accidental starting or enabling of a serive.
For example firewalld can be masked with the following commad
#systemctl mask firewalld
If you ever want to start the firewalld service. you may get the error message
Failed to issue method call: Unit firewalld.service is masked.
To resolve this, unmask the firewall with the following command
#systemctl unmask firewalld
Source:http://theurbanpenguin.com/wp/?p=3387
