Detections
Analytics

1.75 CISC-RT-000740

Information

The Cisco PE router must be configured with Unicast Reverse Path Forwarding (uRPF) loose mode enabled on all CE-facing interfaces.

GROUP ID: V-216802RULE ID: SV-216802r531087

The uRPF feature is a defense against spoofing and denial-of-service (DoS) attacks by verifying if the source address of any ingress packet is reachable. To mitigate attacks that rely on forged source addresses, all provider edge routers must enable uRPF loose mode to guarantee that all packets received from a CE router contain source addresses that are in the route table.

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

Solution

Configure uRPF loose mode on all CE-facing interfaces as shown in the example

RP/0/0/CPU0:R3(config)#int g1/1/0/0RP/0/0/CPU0:R3(config-if)#ipv4 verify unicast source reachable-via any

See Also

https://workbench.cisecurity.org/benchmarks/23599

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7a., CAT|II, CCI|CCI-001097, Rule-ID|SV-216802r531087_rule, STIG-ID|CISC-RT-000740, Vuln-ID|V-216802

Plugin: Cisco

Control ID: d68f774ac325f2e376b89d94368590358eafaff58536bf1db25959778ab6912d