The NSX-T Tier-1 Gateway Firewall must configure SpoofGuard to block outbound IP packets that contain illegitimate packet attributes.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-251769	T1FW-3X-000036	SV-251769r856688_rule		Medium

Description
If outbound communications traffic is not filtered, hostile activity intended to harm other networks may not be detected and prevented.

STIG	Date
VMware NSX-T Tier 1 Gateway Firewall Security Technical Implementation Guide	2023-06-22

Details

Check Text ( C-55206r810200_chk )
From the NSX-T Manager web interface, go to Networking >> Segments, and for each Segment, view Segment Profiles >> SpoofGuard. If a Segment is not configured with a SpoofGuard profile that has Port Binding enabled, this is a finding.

Fix Text (F-55160r810201_fix)
To create a segment profile with SpoofGuard enabled do the following: From the NSX-T Manager web interface, go to Networking >> Segments >> Segment Profiles >> Add Segment Profile >> SpoofGuard. Enter a profile name and enable port bindings, then click "Save". To update a Segment's SpoofGuard profile, do the following: From the NSX-T Manager web interface, go to the Networking >> Segments, then click "Edit" from the drop-down menu next to the target Segment. Expand Segment Profiles, choose the new SpoofGuard profile from the drop-down list, and then click "Save".

Fix Text (F-55160r810201_fix)

To create a segment profile with SpoofGuard enabled do the following:

From the NSX-T Manager web interface, go to Networking >> Segments >> Segment Profiles >> Add Segment Profile >> SpoofGuard.

Enter a profile name and enable port bindings, then click "Save".

To update a Segment's SpoofGuard profile, do the following:

From the NSX-T Manager web interface, go to the Networking >> Segments, then click "Edit" from the drop-down menu next to the target Segment.

Expand Segment Profiles, choose the new SpoofGuard profile from the drop-down list, and then click "Save".