JUNI-RT-000380 - The Juniper perimeter router must be configured to block all outbound management traffic.

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Information

For in-band management, the management network must have its own subnet in order to enforce control and access boundaries provided by Layer 3 network nodes, such as routers and firewalls. Management traffic between the managed network elements and the management network is routed via the same links and nodes as that used for production or operational traffic. Safeguards must be implemented to ensure that the management traffic does not leak past the perimeter of the managed network.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

This requirement is not applicable for the DoDIN Backbone.

Configure the perimeter router of the managed network with an outbound filter on the egress interface to block all management traffic.

Configure a filter to block egress management traffic.

[edit firewall family inet]
Set filter OUTBOUND_FILTER term BLOCK_TACACS from protocol tcp port tacacs
Set filter OUTBOUND_FILTER term BLOCK_TACACS then syslog discard
Set filter OUTBOUND_FILTER term BLOCK_SNMP from protocol udp port [snmp snmptrap]
Set filter OUTBOUND_FILTER term BLOCK_SNMP then syslog discard
set filter OUTBOUND_FILTER term BLOCK_NETFLOW from protocol udp port [2055 9995 9996]
set filter OUTBOUND_FILTER term BLOCK_NETFLOW then syslog discard

Configure the external interfaces with the outbound filter.

[edit interfaces ge-0/0/0 unit 0 family inet]
set filter output OUTBOUND_FILTER

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Juniper_Router_Y21M02_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7, CAT|II, CCI|CCI-001097, Rule-ID|SV-217043r639663_rule, STIG-ID|JUNI-RT-000380, STIG-Legacy|SV-101081, STIG-Legacy|V-90871, Vuln-ID|V-217043

Plugin: Juniper

Control ID: 9b4fb0d067b81d6e022b17ac961cfdcecc2d5e975e761d5155d2ee1814eb4556