STIGQter: STIG Summary: RUCKUS ICX Router Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 27 May 2025:

The RUCKUS ICX 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.

DISA Rule

SV-273647r1111041_rule

Vulnerability Number

V-273647

Group Title

SRG-NET-000364-RTR-000114

Rule Version

RCKS-RTR-000800

Severity

CAT III

CCI(s)

• CCI-002403 - Only allow incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations.

Weight

10

Fix Recommendation

Configure the DR to filter the IGMP and MLD report messages to allow hosts to join only those multicast groups from sources that have been approved.

1. Configure the Access Control List (ACL) to filter IGMP membership report messages as shown in the example below:
ICX(config)#ip access-list standard IGMP_JOIN_FILTER
ICX(config-std-ipacl-IGMP_JOIN_FILTER)#deny 239.0.0.0/16
ICX(config-std-ipacl-IGMP_JOIN_FILTER)#permit any
ICX(config-std-ipacl-IGMP_JOIN_FILTER)#exit

2. Apply the filter to all nonhost-facing interfaces.
ICX(config)interface ethernet 1/2/1
ICX(config-if-e1000-1/2/1)#ip igmp ver 3
ICX(config-if-e1000-1/2/1)#ip igmp access-group IGMP_JOIN_FILTER

Check Contents

Review the configuration of the DR to verify it is filtering IGMP or MLD report messages, allowing hosts to only join multicast groups from sources that have been approved.

Note: This requirement is only applicable to Source Specific Multicast (SSM) implementation. This requirement is not applicable to Any Source Multicast (ASM) since the filtering is being performed by the Rendezvous Pointerface router.

1. Verify all host facing interfaces are configured to filter IGMP Membership Report messages (IGMP joins) as shown in the example below:
ICX(conf)#interface ethernet 1/2/1
ICX(config-if-e10000-1/2/1)#ip igmp ver 3
ICX(config-if-e10000-1/2/1)#ip igmp access-group IGMP_JOIN_FILTER
ICX(config-ig-e1000-1/2/1)#show access-list all

2. Verify the output below (the access control list, or ACL) denies unauthorized groups or permits only authorized groups. The example below denies all groups from the 239.0.0.0/16 range.
Standard IP access list IGMP_JOIN_FILTER: 2 entries
10: deny 239.0.0.0 0.0.255.255
20: permit any

If the DR is not filtering IGMP or MLD report messages, this is a finding.

Vulnerability Number

V-273647

Documentable

False

Rule Version

RCKS-RTR-000800

Severity Override Guidance

Review the configuration of the DR to verify it is filtering IGMP or MLD report messages, allowing hosts to only join multicast groups from sources that have been approved.

Note: This requirement is only applicable to Source Specific Multicast (SSM) implementation. This requirement is not applicable to Any Source Multicast (ASM) since the filtering is being performed by the Rendezvous Pointerface router.

1. Verify all host facing interfaces are configured to filter IGMP Membership Report messages (IGMP joins) as shown in the example below:
ICX(conf)#interface ethernet 1/2/1
ICX(config-if-e10000-1/2/1)#ip igmp ver 3
ICX(config-if-e10000-1/2/1)#ip igmp access-group IGMP_JOIN_FILTER
ICX(config-ig-e1000-1/2/1)#show access-list all

2. Verify the output below (the access control list, or ACL) denies unauthorized groups or permits only authorized groups. The example below denies all groups from the 239.0.0.0/16 range.
Standard IP access list IGMP_JOIN_FILTER: 2 entries
10: deny 239.0.0.0 0.0.255.255
20: permit any

If the DR is not filtering IGMP or MLD report messages, this is a finding.

Check Content Reference

M

Target Key

5696