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The NSX-T Tier-1 Gateway Firewall must deny network communications traffic by default and allow network communications traffic by exception (i.e., deny all, permit by exception).

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-251765T1FW-3X-000021SV-251765r810190_ruleCCI-001109medium
Description
To prevent malicious or accidental leakage of traffic, organizations must implement a deny-by-default security posture at the network perimeter. Such rulesets prevent many malicious exploits or accidental leakage by restricting the traffic to only known sources and only those ports, protocols, or services that are permitted and operationally necessary. This configuration which is in the Manager function of the NSX-T implementation also helps prevent the firewall instance from failing to a state that may cause unauthorized access to make changes to the firewall filtering functions. As a managed boundary interface, the firewall must block all inbound and outbound network traffic unless a filter is installed to explicitly allow it. The allow filters must comply with the Ports, Protocols, and Services Management (PPSM) Category Assurance List (CAL) and Vulnerability Assessment (VA). Satisfies: SRG-NET-000235-FW-000133, SRG-NET-000236-FW-000027
STIGDate
VMware NSX-T Tier 1 Gateway Firewall Security Technical Implementation Guide2023-06-22

Related Frameworks

3 mappings across 5 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (10) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

BCD-01Business Continuity Management System (BCMS)
1.00
CFG-02Secure Baseline Configurations
1.00
CRY-01Use of Cryptographic Controls
1.00
DCH-01Data Protection
1.00
IAC-21Least Privilege
1.00
SEA-01Secure Engineering Principles
1.00
SEA-01.2Achieving Resilience Requirements
1.00
SEA-02Alignment With Enterprise Architecture
1.00
NET-04.1Deny Traffic by Default & Allow Traffic by Exception
0.50
SEA-07.2Fail Secure
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (16) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-4Information Flow Enforcement
1.00
AU-12Audit Record Generation
1.00
AU-12(3)Changes by Authorized Individuals
1.00
AU-14(1)System Start-up
1.00
AU-3Content of Audit Records
1.00
AU-3(1)Additional Audit Information
1.00
AU-3(2)Centralized Management of Planned Audit Record Content
1.00
AU-5Response to Audit Logging Process Failures
1.00
AU-6(4)Central Review and Analysis
1.00
CM-7(2)Prevent Program Execution
1.00

+6 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.13.6
1.00
CCI3 mappings
CCI-001109
1.00
CCI-001190
1.00
CCI-001665
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (2) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

PR.DS-10
1.00
PR.IR-03
1.00

Who does this work

13 NICE work roles and 8 EC-Council certifications.

This is an inference across published mappings, not a single claim by anyone. This check maps to a control, which maps to a Cybersecurity Framework outcome, which NIST assigns to the work roles below. EC-Council separately maps its certifications to those same roles.

A certification prepares someone for a role. It is not evidence that a holder is qualified, and neither NIST nor EC-Council has stated that any certification here addresses this check.

Work-role assignments published by NIST (NICE Framework Components 2.2.0 and the CSF 2.0 OLIR crosswalk). Certification mappings published by EC-Council.

Details

Check Text (C-251765r810190_chk)

From the NSX-T Manager web interface, go to Security >> Gateway Firewall >> Gateway Specific Rules >> Choose each Tier-1 Gateway in drop-down >> Policy_Default_Infra Section >> Action. If the default_rule is set to Allow, this is a finding.

Fix Text (F-55156r810189_fix)

From the NSX-T Manager web interface, go to Security >> Gateway Firewall >> Gateway Specific Rules >> Choose each Tier-1 Gateway in drop-down >> Policy_Default_Infra Section >> Action >> change the Action to Drop or Reject and click Publish.