VMware NSX-T Tier-0 Gateway RTR Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The NSX-T Tier-0 Gateway must be configured to have all inactive interfaces removed.
<VulnDiscussion>An inactive interface is rarely monitored or controlled and may expose a network to an undetected attack on that interface. ...Rule Low Severity -
SRG-NET-000131-RTR-000035
<GroupDescription></GroupDescription>Group -
SRG-NET-000018-RTR-000003
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to reject inbound route advertisements for any prefixes belonging to the local autonomous system (AS).
<VulnDiscussion>Accepting route advertisements belonging to the local AS can result in traffic looping or being black holed, or at a minimum ...Rule Medium Severity -
SRG-NET-000019-RTR-000003
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to disable Protocol Independent Multicast (PIM) on all interfaces that are not required to support multicast routing.
<VulnDiscussion>If multicast traffic is forwarded beyond the intended boundary, it is possible that it can be intercepted by unauthorized or ...Rule Medium Severity -
SRG-NET-000019-RTR-000007
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to have the DHCP service disabled if not in use.
<VulnDiscussion>A compromised router introduces risk to the entire network infrastructure, as well as data resources that are accessible via ...Rule Low Severity -
SRG-NET-000193-RTR-000112
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to enforce a Quality-of-Service (QoS) policy to limit the effects of packet flooding denial-of-service (DoS) attacks.
<VulnDiscussion>DoS is a condition when a resource is not available for legitimate users. Packet flooding distributed denial-of-service (DDoS...Rule Medium Severity -
SRG-NET-000205-RTR-000001
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to restrict traffic destined to itself.
<VulnDiscussion>The route processor handles traffic destined to the router, the key component used to build forwarding paths, and is also ins...Rule High Severity -
SRG-NET-000205-RTR-000014
<GroupDescription></GroupDescription>Group -
Unicast Reverse Path Forwarding (uRPF) must be enabled on the NSX-T Tier-0 Gateway.
<VulnDiscussion>A compromised host in an enclave can be used by a malicious platform to launch cyber attacks on third parties. This is a comm...Rule High Severity -
SRG-NET-000230-RTR-000001
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to implement message authentication for all control plane protocols.
<VulnDiscussion>A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect o...Rule Medium Severity -
SRG-NET-000230-RTR-000002
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to use a unique key for each autonomous system (AS) with which it peers.
<VulnDiscussion>If the same keys are used between eBGP neighbors, the chance of a hacker compromising any of the BGP sessions increases. It i...Rule Medium Severity -
SRG-NET-000362-RTR-000113
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to have Internet Control Message Protocol (ICMP) unreachable notifications disabled on all external interfaces.
<VulnDiscussion>The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Routers automatically send ...Rule Medium Severity -
SRG-NET-000362-RTR-000114
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to have Internet Control Message Protocol (ICMP) mask replies disabled on all external interfaces.
<VulnDiscussion>The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Routers automatically send ...Rule Medium Severity -
SRG-NET-000362-RTR-000115
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to have Internet Control Message Protocol (ICMP) redirects disabled on all external interfaces.
<VulnDiscussion>The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Routers automatically send ...Rule Medium Severity -
SRG-NET-000362-RTR-000117
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to use the BGP maximum prefixes feature to protect against route table flooding and prefix de-aggregation attacks.
<VulnDiscussion>The effects of prefix de-aggregation can degrade router performance due to the size of routing tables and also result in blac...Rule Medium Severity -
SRG-NET-000512-RTR-000001
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to use its loopback address as the source address for iBGP peering sessions.
<VulnDiscussion>Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability o...Rule Low Severity -
SRG-NET-000131-RTR-000035
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to have routing protocols disabled if not in use.
<VulnDiscussion>A compromised router introduces risk to the entire network infrastructure, as well as data resources that are accessible via ...Rule Low Severity -
SRG-NET-000131-RTR-000035
<GroupDescription></GroupDescription>Group -
The NSX-T Tier-0 Gateway must be configured to have multicast disabled if not in use.
<VulnDiscussion>A compromised router introduces risk to the entire network infrastructure, as well as data resources that are accessible via ...Rule Low Severity
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