I - Mission Critical Sensitive
Rules and Groups employed by this XCCDF Profile
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SRG-NET-000018-RTR-000001
Group -
The Dell OS10 Router must be configured to enforce approved authorizations for controlling the flow of information within the network based on organization-defined information flow control policies.
Information flow control regulates where information is allowed to travel within a network and between interconnected networks. The flow of all network traffic must be monitored and controlled so i...Rule Medium Severity -
SRG-NET-000018-RTR-000002
Group -
The Dell OS10 BGP router must be configured to reject inbound route advertisements for any Bogon prefixes.
Accepting route advertisements for Bogon prefixes can result in the local autonomous system (AS) becoming a transit for malicious traffic as it will in turn advertise these prefixes to neighbor aut...Rule Medium Severity -
SRG-NET-000018-RTR-000003
Group -
The Dell OS10 BGP router must be configured to reject inbound route advertisements for any prefixes belonging to the local autonomous system (AS).
Accepting route advertisements belonging to the local AS can result in traffic looping or being black holed, or at a minimum using a nonoptimized path.Rule Medium Severity -
SRG-NET-000018-RTR-000004
Group -
The Dell OS10 BGP router must be configured to reject inbound route advertisements from a customer edge (CE) router for prefixes that are not allocated to that customer.
As a best practice, a service provider should only accept customer prefixes that have been assigned to that customer and any peering autonomous systems. A multihomed customer with BGP speaking rout...Rule Medium Severity -
SRG-NET-000018-RTR-000005
Group -
The Dell OS10 BGP router must be configured to reject outbound route advertisements for any prefixes that do not belong to any customers or the local autonomous system (AS).
Advertisement of routes by an autonomous system for networks that do not belong to any of its customers pulls traffic away from the authorized network. This causes a denial of service (DoS) on the ...Rule Medium Severity -
SRG-NET-000018-RTR-000006
Group -
The Dell OS10 BGP router must be configured to reject route advertisements from BGP peers that do not list their autonomous system (AS) number as the first AS in the AS_PATH attribute.
Verifying the path a route has traversed will ensure the IP core is not used as a transit network for unauthorized or possibly even internet traffic. All autonomous system boundary routers (ASBRs) ...Rule Low Severity -
SRG-NET-000018-RTR-000010
Group -
The Dell OS10 BGP router must be configured to reject route advertisements from CE routers with an originating autonomous system (AS) in the AS_PATH attribute that does not belong to that customer.
Verifying the path a route has traversed will ensure that the local AS is not used as a transit network for unauthorized traffic. To ensure that the local AS does not carry any prefixes that do not...Rule Low Severity -
SRG-NET-000019-RTR-000003
Group -
The Dell OS10 multicast router must be configured to disable Protocol Independent Multicast (PIM) on all interfaces that are not required to support multicast routing.
If multicast traffic is forwarded beyond the intended boundary, it is possible that it can be intercepted by unauthorized or unintended personnel. Limiting where, within the network, a given multic...Rule Medium Severity -
SRG-NET-000019-RTR-000004
Group -
The Dell OS10 multicast router must be configured to bind a Protocol Independent Multicast (PIM) neighbor filter to interfaces that have PIM enabled.
PIM is a routing protocol used to build multicast distribution trees for forwarding multicast traffic across the network infrastructure. PIM traffic must be limited to only known PIM neighbors by c...Rule Medium Severity -
SRG-NET-000019-RTR-000007
Group -
The Dell OS10 Router must be configured to have all inactive interfaces disabled.
An inactive interface is rarely monitored or controlled and may expose a network to an undetected attack on that interface. Unauthorized personnel with access to the communication facility could ga...Rule Low Severity -
SRG-NET-000019-RTR-000009
Group -
The perimeter router must be configured to not be a Border Gateway Protocol (BGP) peer to an alternate gateway service provider.
ISPs use BGP to share route information with other autonomous systems (i.e., other ISPs and corporate networks). If the perimeter router was configured to BGP peer with an ISP, NIPRnet routes could...Rule High Severity -
SRG-NET-000019-RTR-000011
Group -
The Dell OS10 out-of-band management (OOBM) gateway router must be configured to have separate Interior Gateway Protocol (IGP) instances for the managed network and management network.
If the gateway router is not a dedicated device for the OOBM network, implementation of several safeguards for containment of management and production traffic boundaries must occur. Since the mana...Rule Medium Severity -
SRG-NET-000019-RTR-000012
Group -
The Dell OS10 out-of-band management (OOBM) gateway router must be configured to not redistribute routes between the management network routing domain and the managed network routing domain.
If the gateway router is not a dedicated device for the OOBM network, several safeguards must be implemented for containment of management and production traffic boundaries; otherwise, it is possib...Rule Medium Severity -
SRG-NET-000019-RTR-000013
Group -
The Dell OS10 multicast Rendezvous Point (RP) router must be configured to filter Protocol Independent Multicast (PIM) Register messages received from the Designated Router (DR) for any undesirable multicast groups and sources.
Real-time multicast traffic can entail multiple large flows of data. An attacker can flood a network segment with multicast packets, over-using the available bandwidth and thereby creating a denial...Rule Low Severity -
SRG-NET-000019-RTR-000014
Group -
The Dell OS10 multicast Rendezvous Point (RP) router must be configured to filter Protocol Independent Multicast (PIM) Join messages received from the Designated Router (DR) for any undesirable multicast groups.
Real-time multicast traffic can entail multiple large flows of data. An attacker can flood a network segment with multicast packets, over-using the available bandwidth and thereby creating a denial...Rule Low Severity -
SRG-NET-000078-RTR-000001
Group -
The Dell OS10 Router must be configured to log all packets that have been dropped.
Auditing and logging are key components of any security architecture. It is essential for security personnel to know what is being done or attempted to be done, and by whom, to compile an accurate ...Rule Low Severity -
SRG-NET-000168-RTR-000077
Group -
The Dell OS10 Router must be configured to use encryption for routing protocol authentication.
A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect or even a rogue destination. This diverted traffic could be analyzed to l...Rule Medium Severity -
SRG-NET-000168-RTR-000078
Group -
The Dell OS10 Router must be configured to authenticate all routing protocol messages using NIST-validated FIPS 198-1 message authentication code algorithm.
A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect or even a rogue destination. This diverted traffic could be analyzed to l...Rule Medium Severity -
SRG-NET-000193-RTR-000112
Group -
The PE router must be configured to enforce a Quality-of-Service (QoS) policy to limit the effects of packet flooding denial-of-service (DoS) attacks.
DoS is a condition when a resource is not available for legitimate users. Packet flooding distributed denial-of-service (DDoS) attacks are referred to as volumetric attacks and have the objective o...Rule Medium Severity -
SRG-NET-000205-RTR-000001
Group -
The Dell OS10 Router must be configured to restrict traffic destined to itself.
The route processor handles traffic destined to the router—the key component used to build forwarding paths and is also instrumental with all network management functions. Hence, any disruption or ...Rule High Severity -
SRG-NET-000205-RTR-000002
Group -
The Dell OS10 Router must be configured to drop all fragmented Internet Control Message Protocol (ICMP) packets destined to itself.
Fragmented ICMP packets can be generated by hackers for denial-of-service (DoS) attacks such as Ping O' Death and Teardrop. It is imperative that all fragmented ICMP packets are dropped.Rule Medium Severity -
SRG-NET-000205-RTR-000006
Group -
The Dell OS10 BGP router must be configured to reject outbound route advertisements for any prefixes belonging to the IP core.
Outbound route advertisements belonging to the core can result in traffic either looping or being black holed, or at a minimum, using a nonoptimized path.Rule Medium Severity -
SRG-NET-000205-RTR-000010
Group -
The Dell OS10 out-of-band management (OOBM) gateway router must be configured to forward only authorized management traffic to the Network Operations Center (NOC).
The OOBM network is an IP network used exclusively for the transport of OAM&P data from the network being managed to the OSS components located at the NOC. Its design provides connectivity to each ...Rule Medium Severity -
SRG-NET-000205-RTR-000011
Group -
The Dell OS10 out-of-band management (OOBM) gateway router must be configured to block any traffic destined to itself that is not sourced from the OOBM network or the NOC.
If the gateway router is not a dedicated device for the OOBM network, several safeguards must be implemented for containment of management and production traffic boundaries. It is imperative that h...Rule Medium Severity -
SRG-NET-000230-RTR-000001
Group -
The Dell OS10 Router must be configured to implement message authentication for all control plane protocols.
A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect or even a rogue destination. This diverted traffic could be analyzed to l...Rule Medium Severity
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