V-283912

Discussion

A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect or rogue destination. This diverted traffic could be analyzed to learn confidential information about the site's network or used to disrupt the network's ability to communicate with other networks. This is known as a "traffic attraction attack" and is prevented by configuring neighbor router authentication for routing updates. This requirement applies to all IPv4 and IPv6 protocols that are used to exchange routing or packet forwarding information. This includes Border Gateway Protocol (BGP), Routing Information Protocol (RIP), Open Shortest Path First (OSPF), Enhanced Interior Gateway Routing Protocol (EIGRP), Intermediate System to Intermediate System (IS-IS), and Label Distribution Protocol (LDP). Satisfies: SRG-NET-000230-RTR-000001, SRG-NET-000168-RTR-000077

Check Content

Review the router configuration.

For every protocol that affects the routing or forwarding tables (where information is exchanged between neighbors), verify neighbor router authentication is enabled using the command below: 

- show system security keychain "test" detail

Key chain:test

Description                : (Not Specified)
TCP-Option number send     : tcp-ao                 Admin state   : Up
TCP-Option number receive  : tcp-ao                 Oper state    : Up
Used by                    : BGP
Expired                    : No

Key entries for key chain: test

Id               : 1                    Direction        : send-receive
Algorithm        : aes-128-cmac-96      Option           : none
Admin State      : Up                   RX Valid         : Yes
TX Active        : Yes                  Tolerance        : 300
Begin Time       : 2025/12/28 00:00:00  Begin Time (UTC) : 2025/12/28 00:00:00
End Time         : 2026/06/28 00:00:00  End Time (UTC)   : 2026/06/28 00:00:00

If authentication is not enabled, this is a finding.