ARST-RT-000410 - The Arista router must be configured with Unicast Reverse Path Forwarding (uRPF) loose mode enabled on all CE-facing interfaces.

Information

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.

Solution

Enable uRPF loose mode on all CE-facing interfaces.

Configure uRPF loose mode on all CE-facing interfaces.

router(config)#interface Ethernet 3/17/1
router(config-if-Et3/17/1)#ip verify unicast source reachable-via any
router(config-if-Et3/17/1)#end

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Arista_MLS_EOS_4-2x_Y24M07_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7a., CAT|II, CCI|CCI-001097, Rule-ID|SV-256022r882408_rule, STIG-ID|ARST-RT-000410, Vuln-ID|V-256022

Plugin: Arista

Control ID: e4b86965422a828b5aa9088f7a79c935b358f6de9e0c6a0cbd05eda16ae25547