STIGQter: STIG Summary: Nokia Service Router OS 25.x Router Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 28 Apr 2026:

The multicast Rendezvous Point (RP) must be configured to rate limit the number of Protocol Independent Multicast (PIM) register messages.

DISA Rule

SV-283822r1204021_rule

Vulnerability Number

V-283822

Group Title

SRG-NET-000362-RTR-000121

Rule Version

NOKI-RT-000040

Severity

CAT II

CCI(s)

• CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.

Weight

10

Fix Recommendation

Configure the RP to rate limit the number of multicast register messages, as shown in the example below:

Note: Limit may be set by packet-per-second or kilobit-per-second.

- configure system security dist-cpu-protection
- config>sys>security>dist-cpu-protection# policy "test-dcp"
- config>sys>security>dist-cpu-protection>policy# static-policer "PIM-RATE-LIMIT" create
- config>sys>security>dist-cpu-protection>policy>static# rate packets 1 within 1
- config>sys>security>dist-cpu-protection>policy>static# exceed-action discard
- config>sys>security>dist-cpu-protection>policy>static# exit
- config>sys>security>dist-cpu-protection>policy# protocol pim
- config>sys>security>dist-cpu-protection>policy>protocol# enforcement static "PIM-RATE-LIMIT"
- config>sys>security>dist-cpu-protection>policy>protocol# exit all

- configure router interface "TO-PE3" dist-cpu-protection "test-dcp"

Check Contents

Review the configuration of the RP to verify it is rate limiting the number of multicast register messages.

Verify the CPU-protection policy has been configured on the interface, as shown in the example below:

- show router interface "TO-PE3" detail | match OperDCpuProtPlcy

OperDCpuProtPlcy : test-dcp

Verify if the policer state and exceed count:

- show router interface "TO-PE3" dist-cpu-protection detail

-------------------------------------------------------------------------------
Statistics/Policer-State Information

-------------------------------------------------------------------------------
Static Policer
-------------------------------------------------------------------------------
Policer-Name : PIM-RATE-LIMIT
Card/FP : 1/1 Policer-State : Conform
Protocols Mapped : pim
Exceed-Count : 0
Total Exceed-Count : 0 Exceed-State-Count : 0
Detec. Time Remain : 0 seconds Hold-Down Remain. : none
Operational (adapted) Rate Parameters:
Oper. Packets : 1 ppi Oper. Within : 1 seconds
Oper. Initial Delay: none
Oper. Depth : 0 packets

If the RP is not limiting multicast register messages, this is a finding.

Vulnerability Number

V-283822

Documentable

False

Rule Version

NOKI-RT-000040

Severity Override Guidance

Review the configuration of the RP to verify it is rate limiting the number of multicast register messages.

Verify the CPU-protection policy has been configured on the interface, as shown in the example below:

- show router interface "TO-PE3" detail | match OperDCpuProtPlcy

OperDCpuProtPlcy : test-dcp

Verify if the policer state and exceed count:

- show router interface "TO-PE3" dist-cpu-protection detail

-------------------------------------------------------------------------------
Statistics/Policer-State Information

-------------------------------------------------------------------------------
Static Policer
-------------------------------------------------------------------------------
Policer-Name : PIM-RATE-LIMIT
Card/FP : 1/1 Policer-State : Conform
Protocols Mapped : pim
Exceed-Count : 0
Total Exceed-Count : 0 Exceed-State-Count : 0
Detec. Time Remain : 0 seconds Hold-Down Remain. : none
Operational (adapted) Rate Parameters:
Oper. Packets : 1 ppi Oper. Within : 1 seconds
Oper. Initial Delay: none
Oper. Depth : 0 packets

If the RP is not limiting multicast register messages, this is a finding.

Check Content Reference

M

Target Key

5746