STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

TOSS 5 must control remote access methods.

DISA Rule

SV-282487r1200441_rule

Vulnerability Number

V-282487

Group Title

SRG-OS-000096-GPOS-00050

Rule Version

TOSS-05-000195

Severity

CAT II

CCI(s)

• CCI-000382 - Configure the system to prohibit or restrict the use of organization-defined prohibited or restricted functions, system ports, protocols, software, and/or services.

Weight

10

Fix Recommendation

Configure TOSS 5 to allow approved settings and/or running services to comply with the PPSM CLSA for the site or program and the PPSM CAL, or other applicable documentation approved by the ISSO.

To open a port for a service, configure "firewalld" using the following command:

$ sudo firewall-cmd --permanent --add-port=port_number/tcp
or
$ sudo firewall-cmd --permanent --add-service=service_name

Check Contents

Inspect the list of enabled firewall ports and verify they are configured correctly using the following command:

$ sudo firewall-cmd --list-all

Ask the system administrator for the site or program Ports, Protocols, and Services Management Component Local Service Assessment (PPSM CLSA). Verify the services allowed by the firewall match the PPSM CLSA, or other applicable documentation approved by the information system security officer (ISSO).

If there are additional ports, protocols, or services that are not in the PPSM CLSA, or there are ports, protocols, or services that are prohibited by the PPSM Category Assurance List (CAL), or there are no firewall rules configured, this is a finding.

Vulnerability Number

V-282487

Documentable

False

Rule Version

TOSS-05-000195

Severity Override Guidance

Inspect the list of enabled firewall ports and verify they are configured correctly using the following command:

$ sudo firewall-cmd --list-all

Ask the system administrator for the site or program Ports, Protocols, and Services Management Component Local Service Assessment (PPSM CLSA). Verify the services allowed by the firewall match the PPSM CLSA, or other applicable documentation approved by the information system security officer (ISSO).

If there are additional ports, protocols, or services that are not in the PPSM CLSA, or there are ports, protocols, or services that are prohibited by the PPSM Category Assurance List (CAL), or there are no firewall rules configured, this is a finding.

Check Content Reference

M

Target Key

5738