Juniper EX Series Switches Router 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 drop fragmented IPv6 packets where the first fragment does not include the entire IPv6 header chain.
One of the fragmentation weaknesses known in IPv6 is the "undetermined transport" packet, which is the first fragment where the entire IPv6 header chain is not included. Fragmenting IPv6 datagrams ...Rule Medium Severity -
The Juniper perimeter router must be configured to drop IPv6 packets containing a Destination Option header with invalid option type values.
These options are intended to be for the Hop-by-Hop header only. The optional and extensible natures of the IPv6 extension headers require higher scrutiny since many implementations do not always d...Rule Medium Severity -
The Juniper BGP router must be configured to use its loopback address as the source address for iBGP peering sessions.
Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability of the BGP routers. It is easier to construct appropriate ingress filters...Rule Low Severity -
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 -
The Juniper MPLS router must be configured to synchronize IGP and LDP to minimize packet loss when an IGP adjacency is established prior to LDP peers completing label exchange.
Packet loss can occur when an IGP adjacency is established and the router begins forwarding packets using the new adjacency before the LDP label exchange completes between the peers on that link. P...Rule Low Severity -
The Juniper PE router must be configured to have each Virtual Routing and Forwarding (VRF) instance bound to the appropriate physical or logical interfaces to maintain traffic separation between all MPLS L3VPNs.
The primary security model for an MPLS L3VPN infrastructure is traffic separation. The service provider must guarantee the customer that traffic from one VPN does not leak into another VPN or into ...Rule High Severity -
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 -
The Juniper PE router providing MPLS Virtual Private Wire Service (VPWS) must be configured to have the appropriate virtual circuit identification (VC ID) for each attachment circuit.
VPWS is an L2VPN technology that provides a virtual circuit between two PE routers to forward layer 2 frames between two customer-edge routers or switches through an MPLS-enabled IP core. The ingre...Rule High Severity -
The Juniper PE router must be configured to enforce the split-horizon rule for all pseudowires within a Virtual Private LAN Services (VPLS) bridge domain.
A virtual forwarding instance (VFI) must be created on each participating PE router for each customer VLAN using VPLS for carrier Ethernet services. The VFI specifies the VPN ID of a VPLS domain, t...Rule Low Severity -
The Juniper Multicast Source Discovery Protocol (MSDP) router must be configured to use its loopback address as the source address when originating MSDP traffic.
Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability of MSDP routers. It is easier to construct appropriate ingress filters fo...Rule Low Severity
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