The Nokia perimeter router must be configured to block inbound packets with source Bogon IP address prefixes.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-283897 | NOKI-RT-000860 | SV-283897r1203940_rule | CCI-002403 | medium |
| Description | ||||
| Bogons include IP packets on the public internet that contain addresses that are not in any range allocated or delegated by the Internet Assigned Numbers Authority (IANA) or a delegated regional internet registry (RIR) and allowed for public internet use. Bogons also include multicast, IETF reserved, and special-purpose address space as defined in RFC 6890. Security of the internet's routing system relies on the ability to authenticate an assertion of unique control of an address block. Measures to authenticate such assertions rely on the validation the address block forms as part of an existing allocated address block and must be a trustable and unique reference in the IANA address registries. The intended use of a Bogon address would only be to address spoofing in denial-of-service attacks. Hence, it is imperative that IP packets with a source Bogon address are blocked at the network's perimeter. | ||||
| STIG | Date | |||
| Nokia Service Router OS 25.x Router Security Technical Implementation Guide | 2026-06-15 | |||
Details
Check Text (C-283897r1203940_chk)
This requirement is not applicable for the DODIN Backbone.
Verify the ingress filter is applied on the interface using the command below:
- show router interface "TO-PE2" detail | match "Ingress Filter"
Egress Filter : 10 Ingress Filter : 50
If the router is not configured to block inbound packets with source Bogon IP addresses, this is a finding.
Fix Text (F-88367r1203939_fix)
This requirement is not applicable for the DODIN Backbone.
Configure the router to block inbound packets with Bogon source addresses using the example below:
Create a prefix list:
- configure filter match-list ip-prefix-list Bogon-IP-List create
- config>filter>match-list>ip-pfx-list$ prefix 0.0.0.0/32
- config>filter>match-list>ip-pfx-list$ prefix 10.0.0.0/8
- config>filter>match-list>ip-pfx-list$ prefix 100.64.0.0/10
- config>filter>match-list>ip-pfx-list$ prefix 127.0.0.0/8
- config>filter>match-list>ip-pfx-list$ prefix 169.254.0.0/16
- config>filter>match-list>ip-pfx-list$ prefix 172.16.0.0/12
- config>filter>match-list>ip-pfx-list$ prefix 192.0.0.0/24
- config>filter>match-list>ip-pfx-list$ prefix 192.0.2.0/24
- config>filter>match-list>ip-pfx-list$ prefix 192.168.0.0/16
- config>filter>match-list>ip-pfx-list$ prefix 192.18.0.0/18
- config>filter>match-list>ip-pfx-list$ prefix 198.51.100.0/24
- config>filter>match-list>ip-pfx-list$ prefix 203.0.113.0/24
- config>filter>match-list>ip-pfx-list$ prefix 224.0.0.0/3
- config>filter>match-list>ip-pfx-list$ exit all
Create an IP filter:
- configure filter ip-filter 50 create
- config>filter>ip-filter$ entry 10 create
- config>filter>ip-filter>entry$ match src-ip ip-prefix-list "Bogon-IP-List"
- config>filter>ip-filter>entry$ action drop
- config>filter>ip-filter>entry$ exit
- config>filter>ip-filter$ entry 20 create
- config>filter>ip-filter>entry$ match protocol "tcp"
- config>filter>ip-filter>entry>match$ exit
- config>filter>ip-filter>entry$ action forward
- config>filter>ip-filter>entry$ exit
- config>filter>ip-filter$ entry 30 create
- config>filter>ip-filter>entry$ match protocol "tcp"
- config>filter>ip-filter>entry>match$ src-ip 10.12.1.9/32
- config>filter>ip-filter>entry>match$ dst-ip 10.12.1.10/32
- config>filter>ip-filter>entry>match$ dst-port 170 eq
- config>filter>ip-filter>entry$ action forward
- config>filter>ip-filter>entry$ exit
- config>filter>ip-filter$ entry 40 create
- config>filter>ip-filter>entry$ match protocol "tcp"
- config>filter>ip-filter>entry>match$ src-ip 10.12.1.9/32
- config>filter>ip-filter>entry>match$ dst-ip 10.12.1.10/32
- config>filter>ip-filter>entry>match$ src-port 170 eq
- config>filter>ip-filter>entry>match$ exit
- config>filter>ip-filter>entry$ action forward
- config>filter>ip-filter>entry$ exit
- config>filter>ip-filter$ entry 50 create
- config>filter>ip-filter>entry$ match protocol "icmp"
- config>filter>ip-filter>entry>match$ src-ip 10.12.1.9/32
- config>filter>ip-filter>entry>match$ dst-ip 10.12.1.10/32
- config>filter>ip-filter>entry>match$ icmp-type "echo-request"
- config>filter>ip-filter>entry>match$ exit
- config>filter>ip-filter>entry$ action forward
- config>filter>ip-filter>entry$ exit
- config>filter>ip-filter$ entry 60 create
- config>filter>ip-filter>entry$ match protocol "icmp"
- config>filter>ip-filter>entry>match$ src-ip 10.12.1.9/32
- config>filter>ip-filter>entry>match$ dst-ip 10.12.1.10/32
- config>filter>ip-filter>entry>match$ icmp-type "echo-reply"
- config>filter>ip-filter>entry>match$ exit
- config>filter>ip-filter>entry$ action forward
- config>filter>ip-filter$ default-action drop
- config>filter>ip-filter$ exit all
Apply the IP filter on the interface:
- configure router interface "TO-PE2" ingress filter ip 50