| V-251736 | High | The NSX-T Tier-0 Gateway Firewall must not have any unpublished firewall policies or rules. | Unpublished firewall rules may be enabled inadvertently and cause unintended filtering or introduce unvetted/unauthorized traffic flows. |
| V-251740 | Medium | 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). | 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... |
| V-251741 | Medium | 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. | Not configuring a key boundary security protection device, such as the firewall, against commonly known attacks is an immediate threat to the protected enclave because they are easily implemented... |
| V-251742 | Medium | The NSX-T Tier-0 Gateway Firewall must apply ingress filters to traffic that is inbound to the network through any active external interface. | Unrestricted traffic to the trusted networks may contain malicious traffic that poses a threat to an enclave or to other connected networks. Additionally, unrestricted traffic may transit a... |
| V-251743 | Medium | The NSX-T Tier-0 Gateway Firewall must configure SpoofGuard to block outbound IP packets that contain illegitimate packet attributes. | If outbound communications traffic is not filtered, hostile activity intended to harm other networks may not be detected and prevented. |
| V-251739 | Medium | The NSX-T Tier-0 Gateway Firewall must block outbound traffic containing denial-of-service (DoS) attacks to protect against the use of internal information systems to launch any DoS attacks against other networks or endpoints. | DoS attacks can take multiple forms but have the common objective of overloading or blocking a network or host to deny or seriously degrade performance. If the network does not provide safeguards... |
| V-251738 | Medium | The NSX-T Tier-0 Gateway Firewall must be configured to use the TLS or LI-TLS protocols to configure and secure communications with the central audit server. | It is critical that when the network element is at risk of failing to process traffic logs as required, it takes action to mitigate the failure. Collected log data be secured and access restricted... |
| V-251737 | Low | The NSX-T Tier-0 Gateway Firewall must generate traffic log entries containing information to establish the details of the event. | Without sufficient information to analyze the event, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack.
Audit event content that must be... |
