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 employ filters that prevent or limit the effects of all types of commonly known denial-of-service (DoS) attacks, including flooding, packet sweeps, and unauthorized port scanning.

DISA Rule

SV-251741r856690_rule

Vulnerability Number

V-251741

Group Title

SRG-NET-000362-FW-000028

Rule Version

T0FW-3X-000028

Severity

CAT II

CCI(s)

• CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.

Weight

10

Fix Recommendation

To create a new Flood Protection profile, do the following:

From the NSX-T Manager web interface, go to Security >> Security Profiles >> Flood Protection >> Add Profile >> Add Firewall Profile.

Enter a name and specify appropriate values for the following: TCP Half Open Connection limit, UDP Active Flow Limit, ICMP Active Flow Limit, and Other Active Connection Limit.

Enable SYN Cache and RST Spoofing, then configure the Applied To field to contain Tier-0 Gateways and click "Save".

Check Contents

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 >> Security Profiles >> Flood Protection to view Flood Protection profiles.

If there are no Flood Protection profiles of type "Gateway", this is a finding.

For each gateway flood protection profile, verify the TCP Half Open Connection limit, UDP Active Flow Limit, ICMP Active Flow Limit, and Other Active Connection Limit are set to "not set" or SYN Cache and RST Spoofing is not "Enabled" on a profile, this is a finding.

For each gateway flood protection profile, examine the Applied To field to view the Tier-0 Gateways to which it is applied.

If a gateway flood protection profile is not applied to all Tier-0 Gateways through one or more policies, this is a finding.

Vulnerability Number

V-251741

Documentable

False

Rule Version

T0FW-3X-000028

Severity Override Guidance

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 >> Security Profiles >> Flood Protection to view Flood Protection profiles.

If there are no Flood Protection profiles of type "Gateway", this is a finding.

For each gateway flood protection profile, verify the TCP Half Open Connection limit, UDP Active Flow Limit, ICMP Active Flow Limit, and Other Active Connection Limit are set to "not set" or SYN Cache and RST Spoofing is not "Enabled" on a profile, this is a finding.

For each gateway flood protection profile, examine the Applied To field to view the Tier-0 Gateways to which it is applied.

If a gateway flood protection profile is not applied to all Tier-0 Gateways through one or more policies, this is a finding.

Check Content Reference

M

Target Key

5451