STIGQter: STIG Summary: VMware NSX-T Tier-0 Gateway Firewall Security Technical Implementation Guide Version: 1 Release: 3 Benchmark Date: 26 Jul 2023:

The NSX-T Tier-0 Gateway Firewall must apply ingress filters to traffic that is inbound to the network through any active external interface.

DISA Rule

SV-251742r856691_rule

Vulnerability Number

V-251742

Group Title

SRG-NET-000364-FW-000031

Rule Version

T0FW-3X-000030

Severity

CAT II

CCI(s)

CCI-002403 - Only allow incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations.

Weight

Fix Recommendation

From the NSX-T Manager web interface, go to Security >> Gateway Firewall >> Gateway Specific Rules and choose the target Tier-0 Gateway from the drop-down.

For any rules that have individual interfaces specified in the "Applied To" field, click "Edit" in the "Applied To" column and remove the interfaces selected, leaving only the Tier-0 Gateway object type checked.

Click "Publish" to save any rule changes.

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If the Tier-0 Gateway is deployed in an Active/Active HA mode and no stateless rules exist, this is Not Applicable.

From the NSX-T Manager web interface, go to Security >> Gateway Firewall >> Gateway Specific Rules. Choose each T0-Gateway in the drop-down and review the firewall rules "Applied To" field to verify no rules are selectively applied to interfaces instead of the Gateway Firewall entity.

If any Gateway Firewall rules are applied to individual interfaces, this is a finding.

The NSX-T Tier-0 Gateway Firewall must apply ingress filters to traffic that is inbound to the network through any active external interface.

DISA Rule

Vulnerability Number

Group Title

Rule Version

Severity

CCI(s)

Weight

Fix Recommendation

Check Contents

Vulnerability Number

Documentable

Rule Version

Severity Override Guidance

Check Content Reference

Target Key