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XCCDF
Guide to the Secure Configuration of SUSE Linux Enterprise 15
System Settings
Network Configuration and Firewalls
firewalld
Ensure Unnecessary Services and Ports Are Not Accepted
Ensure Unnecessary Services and Ports Are Not Accepted
An XCCDF Rule
Details
Profiles
Prose
Ensure Unnecessary Services and Ports Are Not Accepted
Medium Severity
Services and ports can be accepted or explicitly rejected or dropped by a zone. For every zone, a default behavior can be set that handles incoming traffic that is not further specified. Such behavior is defined by setting the target of the zone. The possible options are: -
ACCEPT
- accepts all incoming packets except those disabled by a specific rule. -
REJECT
- disables all incoming packets except those that have been allowed in specific rules and the source machine is informed about the rejection. -
DROP
- disables all incoming packets except those that have been allowed in specific rules and no information sent to the source machine.