Juniper Router RTR Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The Juniper perimeter router must be configured to have Link Layer Discovery Protocol (LLDP) disabled on all external interfaces.
LLDPs are primarily used to obtain protocol addresses of neighboring devices and discover platform capabilities of those devices. Use of SNMP with the LLDP Management Information Base (MIB) allows ...Rule Low Severity -
SRG-NET-000364-RTR-000112
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The Juniper perimeter router must be configured to have Proxy ARP disabled on all external interfaces.
When Proxy ARP is enabled on a router, it allows that router to extend the network (at Layer 2) across multiple interfaces (LAN segments). Because proxy ARP allows hosts from different LAN segments...Rule Medium Severity -
SRG-NET-000364-RTR-000113
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The Juniper perimeter router must be configured to block all outbound management traffic.
For in-band management, the management network must have its own subnet to enforce control and access boundaries provided by Layer 3 network nodes, such as routers and firewalls. Management traffic...Rule Medium Severity -
SRG-NET-000205-RTR-000009
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SRG-NET-000205-RTR-000010
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The Juniper 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-000019-RTR-000011
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The Juniper out-of-band management (OOBM) gateway router must be configured to have separate 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 Juniper 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-000205-RTR-000011
Group -
The Juniper 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-000205-RTR-000012
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SRG-NET-000205-RTR-000013
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The Juniper router providing connectivity to the NOC must be configured to forward all in-band management traffic via an IPsec tunnel.
When the production network is managed in-band, the management network could be housed at a NOC that is located remotely at single or multiple interconnected sites. NOC interconnectivity, as well a...Rule Medium Severity -
SRG-NET-000362-RTR-000124
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The Juniper BGP router must be configured to enable the Generalized TTL Security Mechanism (GTSM).
GTSM is designed to protect a router's IP-based control plane from DoS attacks. Many attacks focused on CPU load and line-card overload can be prevented by implementing GTSM on all Exterior Border ...Rule Low Severity -
SRG-NET-000230-RTR-000002
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The Juniper BGP router must be configured to use a unique key for each autonomous system (AS) that it peers with.
If the same keys are used between eBGP neighbors, the chance of a hacker compromising any of the BGP sessions increases. It is possible that a malicious user exists in one autonomous system who wou...Rule Medium Severity -
SRG-NET-000018-RTR-000002
Group -
The Juniper 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-000004
Group -
SRG-NET-000018-RTR-000005
Group -
The Juniper 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-000205-RTR-000006
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SRG-NET-000018-RTR-000006
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The Juniper 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
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The Juniper BGP router must be configured to reject route advertisements from CE routers with an originating 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-000362-RTR-000117
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SRG-NET-000362-RTR-000118
Group -
The Juniper BGP router must be configured to limit the prefix size on any inbound route advertisement to /24 or the least significant prefixes issued to the customer.
The effects of prefix de-aggregation can degrade router performance due to the size of routing tables and also result in black-holing legitimate traffic. Initiated by an attacker or a misconfigured...Rule Low Severity -
SRG-NET-000512-RTR-000001
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SRG-NET-000512-RTR-000002
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The Juniper MPLS router must be configured to use its loopback address as the source address for LDP peering sessions.
Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability of backbone routers. It is easier to construct appropriate ingress filter...Rule Low Severity -
SRG-NET-000512-RTR-000003
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SRG-NET-000193-RTR-000001
Group -
The Juniper MPLS router with RSVP-TE enabled must be configured to enable refresh reduction features.
RSVP-TE can be used to perform constraint-based routing when building LSP tunnels within the network core that will support QoS and traffic engineering requirements. RSVP-TE is also used to enable ...Rule Low Severity -
SRG-NET-000512-RTR-000004
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SRG-NET-000512-RTR-000005
Group -
SRG-NET-000512-RTR-000006
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The Juniper PE router must be configured to have each Virtual Routing and Forwarding (VRF) instance with the appropriate Route Target (RT).
The primary security model for an MPLS L3VPN as well as a VRF-lite infrastructure is traffic separation. Each interface can only be associated to one VRF, which is the fundamental framework for tra...Rule High Severity -
SRG-NET-000512-RTR-000007
Group -
The Juniper PE router must be configured to have each VRF with the appropriate Route Distinguisher (RD).
An RD provides uniqueness to the customer address spaces within the MPLS L3VPN infrastructure. The concept of the VPN-IPv4 and VPN-IPv6 address families consists of the RD prepended before the IP a...Rule Medium Severity -
SRG-NET-000343-RTR-000001
Group -
The Juniper PE router providing MPLS Layer 2 Virtual Private Network (L2VPN) services must be configured to authenticate targeted Label Distribution Protocol (LDP) sessions used to exchange virtual circuit (VC) information using a FIPS-approved message authentication code algorithm.
LDP provides the signaling required for setting up and tearing down pseudowires (virtual circuits used to transport Layer 2 frames) across an MPLS IP core network. Using a targeted LDP session, eac...Rule Medium Severity -
SRG-NET-000512-RTR-000008
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SRG-NET-000512-RTR-000009
Group
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