STIGQter 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 be configured to prohibit or restrict the use of functions, ports, protocols, and/or services, as defined in the Ports, Protocols, and Services Management (PPSM) Category Assignments List (CAL) and vulnerability assessments.

DISA Rule

SV-282488r1200444_rule

Vulnerability Number

V-282488

Group Title

SRG-OS-000096-GPOS-00050

Rule Version

TOSS-05-000197

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Update the host's firewall 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.

Run the following command to load the newly created rule(s):

$ sudo firewall-cmd --reload

Check Contents

Inspect the firewall configuration and running services to verify it is configured to prohibit or restrict the use of functions, ports, protocols, and/or services that are unnecessary or prohibited.

Check which services are currently active using the following command:

$ sudo firewall-cmd --list-all-zones

custom (active)
target: DROP
icmp-block-inversion: no
interfaces: ens33
sources:
services: dhcpv6-client dns http https ldaps rpc-bind ssh
ports:
masquerade: no
forward-ports:
icmp-blocks:
rich rules:

Ask the system administrator for the site or program PPSM Component Local Service Assessment (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 CAL, this is a finding.

Vulnerability Number

V-282488

Documentable

False

Rule Version

TOSS-05-000197

Severity Override Guidance

Inspect the firewall configuration and running services to verify it is configured to prohibit or restrict the use of functions, ports, protocols, and/or services that are unnecessary or prohibited.

Check which services are currently active using the following command:

$ sudo firewall-cmd --list-all-zones

custom (active)
target: DROP
icmp-block-inversion: no
interfaces: ens33
sources:
services: dhcpv6-client dns http https ldaps rpc-bind ssh
ports:
masquerade: no
forward-ports:
icmp-blocks:
rich rules:

Ask the system administrator for the site or program PPSM Component Local Service Assessment (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 CAL, this is a finding.

Check Content Reference

M

Target Key

5738