The RUCKUS ICX BGP router must be configured to reject route advertisements from BGP peers that do not list their autonomous system (AS) number as the first AS in the AS_PATH attribute.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-273574 | RCKS-RTR-000060 | SV-273574r1110883_rule | CCI-001368 | low |
| Description | ||||
| Verifying the path a route has traversed will ensure the IP core is not used as a transit network for unauthorized or possibly even internet traffic. All autonomous system boundary routers (ASBRs) must ensure updates received from eBGP peers list their AS number as the first AS in the AS_PATH attribute. | ||||
| STIG | Date | |||
| RUCKUS ICX Router Security Technical Implementation Guide | 2025-06-03 | |||
Details
Check Text (C-273574r1110883_chk)
Review the router configuration to verify the router is configured to deny updates received from eBGP peers that do not list their AS number as the first AS in the AS_PATH attribute.
router bgp
local-as 1000
neighbor 10.1.1.1 remote-as 1100
neighbor 10.1.1.1 enforce-first-as enable
If the router is not configured to enforce the first AS in the AS_PATH attribute for eBGP peers, this is a finding.
Fix Text (F-77570r1109743_fix)
Configure all ASBRs to deny updates received from eBGP peers that do not list their AS number as the first AS in the AS_PATH attribute.
ICX(config-bgp-router)# neighbor x.x.x.x remote-as yyyy
ICX(config-bgp-router)# neighbor x.x.x.x enforce-first-as enable