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The Nokia multicast Designated Router (DR) must be configured to filter the Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) Report messages to allow hosts to join only multicast groups that have been approved by the organization.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-283862NOKI-RT-000440SV-283862r1203835_ruleCCI-002403low
Description
Real-time multicast traffic can entail multiple large flows of data. Large unicast flows tend to be fairly isolated (i.e., someone doing a file download here or there), whereas multicast can have broader impact on bandwidth consumption, resulting in extreme network congestion. Hence, it is imperative that there is multicast admission control to restrict which multicast groups the hosts are allowed to join via IGMP or MLD.
STIGDate
Nokia Service Router OS 25.x Router Security Technical Implementation Guide2026-06-15

Related Frameworks

1 mapping across 3 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (2) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

NET-03Boundary Protection
0.50
NET-04.1Deny Traffic by Default & Allow Traffic by Exception
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (8) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

CM-6Configuration Settings
1.00
SC-24Fail in Known State
1.00
SC-47Alternate Communications Paths
1.00
SC-5Denial-of-service Protection
1.00
SC-7Boundary Protection
1.00
SC-7(11)Restrict Incoming Communications Traffic
1.00
SC-7(29)Separate Subnets to Isolate Functions
1.00
SC-7(5)Deny by Default — Allow by Exception
1.00
CCI1 mapping
CCI-002403
1.00

Details

Check Text (C-283862r1203835_chk)

Review the configuration of the DR to verify it is filtering IGMP and MLD report messages, allowing hosts to join only groups that have been approved. Verify the import policy is applied on the IGMP and MLD interface using the command below: - show router igmp interface "TO-CE" detail | match "Import-Policy" Import-Policy : IMPORT_IGMP_JOIN Subnet Check : Enabled - show router mld interface "TO-CE" detail | match "Import-Policy" Import-Policy : IMPORT_MLD_JOIN If the DR is not filtering IGMP and MLD report messages, this is a finding.

Fix Text (F-88332r1203834_fix)

Configure the DR to filter the IGMP and MLD report messages to allow hosts to join only multicast groups that have been approved, as shown in the example below: Create Prefix-List IPv4 Multicast Group: - configure router policy-options - config>router>policy-options# begin - config>router>policy-options# prefix-list Multicast-Group - config>router>policy-options>prefix-list$ prefix 239.8.0.0/16 exact - config>router>policy-options>prefix-list$ exit Create Prefix-List IPv6 Multicast Group: - configure router policy-options - config>router>policy-options# begin - config>router>policy-options# prefix-list Multicast-Group-IPv6 - config>router>policy-options>prefix-list$ prefix ff3e::/16 exact - config>router>policy-options>prefix-list$ exit Create a policy statement for IGMP: - config>router>policy-options# policy-statement IMPORT_IGMP_JOIN - config>router>policy-options>policy-statement$ entry 10 - config>router>policy-options>policy-statement>entry# from prefix-list "Multicast-Group" - config>router>policy-options>policy-statement>entry$ action accept - config>router>policy-options>policy-statement>entry>action$ exit - config>router>policy-options>policy-statement>entry$ exit - config>router>policy-options>policy-statement$ default-action drop - config>router>policy-options>policy-statement>default-action$ exit - config>router>policy-options>policy-statement$ exit - config>router>policy-options# commit Create a policy statement for MLD: - config>router>policy-options# policy-statement IMPORT_MLD_JOIN - config>router>policy-options>policy-statement$ entry 10 - config>router>policy-options>policy-statement>entry$ from prefix-list "Multicast-Group-IPv6" - config>router>policy-options>policy-statement>entry$ action accept - config>router>policy-options>policy-statement>entry>action$ exit - config>router>policy-options>policy-statement>entry$ exit - config>router>policy-options>policy-statement$ default-action drop - config>router>policy-options>policy-statement>default-action$ exit - config>router>policy-options>policy-statement$ exit - config>router>policy-options# commit - config>router>policy-options# exit all Apply import policy to the IGMP and MLD interface: - configure router igmp interface "TO-CE" import "IMPORT_IGMP_JOIN" - configure router mld interface "TO-CE" import "IMPORT_MLD_JOIN"