The Ubuntu operating system must have an application firewall enabled.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-238374 | UBTU-20-010454 | SV-238374r991593_rule | CCI-000366 | medium |
| Description | ||||
| 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. | ||||
| STIG | Date | |||
| Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide | 2025-05-16 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-6
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.4.1
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.4.2
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000366
1.00
- DISA · 2 · disa_xccdf · related
Details
Check Text (C-238374r991593_chk)
Verify the Uncomplicated Firewall is enabled on the system by running the following command:
$ systemctl status ufw.service | grep -i "active:"
Active: active (exited) since Mon 2016-10-17 12:30:29 CDT; 1s ago
If the above command returns the status as "inactive", this is a finding.
If the Uncomplicated Firewall is not installed, ask the System Administrator if another application firewall is installed. If no application firewall is installed, this is a finding.
Fix Text (F-41543r654296_fix)
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:
$ sudo systemctl start ufw.service