The Ubuntu operating system must have an application firewall enabled.
An XCCDF Rule
Description
<VulnDiscussion>Firewalls protect computers from network attacks by blocking or limiting access to open network ports. Application firewalls limit which applications are allowed to communicate over the network.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-238374r991593_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Enable the Uncomplicated Firewall by using the following command:
$ sudo systemctl enable ufw.service
If the Uncomplicated Firewall is not currently running on the system, start it with the following command: