STIGQter: STIG Summary: Layer 2 Switch Security Requirements Guide Version: 3 Release: 4 Benchmark Date: 01 Apr 2026:

The layer 2 switch must have the default VLAN pruned from all trunk ports that do not require it.

DISA Rule

SV-206668r385561_rule

Vulnerability Number

V-206668

Group Title

SRG-NET-000512

Rule Version

SRG-NET-000512-L2S-000009

Severity

CAT II

CCI(s)

• CCI-000366 - Implement the security configuration settings.

Weight

10

Fix Recommendation

Best practice for VLAN-based networks is to prune unnecessary trunk links from gaining access to the default VLAN and to ensure that frames belonging to the default VLAN do not traverse trunks not requiring frames from the VLAN.

Check Contents

Review the switch configuration and verify that the default VLAN is pruned from trunk links that do not require it.

If the default VLAN is not pruned from trunk links that should not be transporting frames for the VLAN, this is a finding.

Vulnerability Number

V-206668

Documentable

False

Rule Version

SRG-NET-000512-L2S-000009

Severity Override Guidance

Review the switch configuration and verify that the default VLAN is pruned from trunk links that do not require it.

If the default VLAN is not pruned from trunk links that should not be transporting frames for the VLAN, this is a finding.

Check Content Reference

M

Target Key

2913