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JUEX-RT-000990 - The Juniper router must be configured to advertise a hop limit of at least 32 in Router Advertisement messages for IPv6 stateless auto-configuration deployments.

Information

The Neighbor Discovery protocol allows a hop limit value to be advertised by routers in a Router Advertisement message being used by hosts instead of the standardized default value. If a very small value was configured and advertised to hosts on the LAN segment, communications would fail due to the hop limit reaching zero before the packets sent by a host reached its destination.

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

Solution

Configure the router to advertise a hop limit of at least 32 in Router Advertisement messages.

set protocols router-advertisement interface <internal interface> current-hop-limit <32 or greater>

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Juniper_EX_Switches_Y26M07_STIG.zip

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CAT|III, CCI|CCI-000366, Rule-ID|SV-254071r844246_rule, STIG-ID|JUEX-RT-000990, Vuln-ID|V-254071

Plugin: Juniper

Control ID: 72cfb4e67276446f9c6adc60bf182c3426c45f6b9eeae8875ba66a54b1bc584b