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4.1.3 Ensure firewalld.service is configured

Information

firewalld.service is a firewall service daemon that provides a dynamic, customizable firewall with a D-Bus interface.

firewalld.service must be active to enforce rules configured through FirewallD. firewalld.service must be enabled to start automatically after a system reboot.

Solution

Run the following commands to unmask, enable, and start firewalld.service :

# systemctl unmask firewalld.service
# systemctl --now enable firewalld.service

Impact:

Enabling and starting firewalld.service activates host-based packet filtering: from that point, incoming traffic is evaluated against the applicable zone and any traffic that is not permitted is blocked. Ensure the services and ports required for the system's role - including remote administration such as SSH - are allowed, or connectivity to the system can be affected.

See Also

https://workbench.cisecurity.org/benchmarks/27890

Item Details

Category: SECURITY ASSESSMENT AND AUTHORIZATION, SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|CA-9, 800-53|SC-7, 800-53|SC-7(5), CSCv7|9.4

Plugin: Unix

Control ID: ef3fc891c4b0371e9acb990a5daa120609d5cd121e46384b41a96689ee65d4b5