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 a multicast group only from sources that have been approved by the organization.

DISA Rule

SV-273648r1111070_rule

Vulnerability Number

V-273648

Group Title

SRG-NET-000364-RTR-000115

Rule Version

RCKS-RTR-000810

Severity

CAT II

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 ext IGMP_JOIN_FILTER
ICX(config-std-ipacl-IGMP_JOIN_FILTER)#deny ip any 239.8.0.0/16
ICX(config-std-ipacl-IGMP_JOIN_FILTER)#permit ip 0.0.0.0/8 any

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 addr x.x.x.x/x
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.

1. Review the configuration for an ACL that denies unauthorized groups or permits only authorized sources.
The example below denies all groups from the 239.8.0.0/16 range and permit from 0.0.0.0/8:
ip access-list extended IGMP_JOIN_FILTER
sequence 10 deny ip any 239.8.0.0 0.0.255.255
sequence 20 permit ip 0.0.0.0 0.255.255.255 any

2. Verify all host facing interfaces are configured to filter IGMP Membership Report messages (IGMP joins) as shown in the example below:
interface ethernet x/x/x
ip address x.0.1.2 255.255.255.252
ip pim-sparse
ip igmp version 3
ip igmp access-group IGMP_JOIN_FILTER

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

Vulnerability Number

V-273648

Documentable

False

Rule Version

RCKS-RTR-000810

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.

1. Review the configuration for an ACL that denies unauthorized groups or permits only authorized sources.
The example below denies all groups from the 239.8.0.0/16 range and permit from 0.0.0.0/8:
ip access-list extended IGMP_JOIN_FILTER
sequence 10 deny ip any 239.8.0.0 0.0.255.255
sequence 20 permit ip 0.0.0.0 0.255.255.255 any

2. Verify all host facing interfaces are configured to filter IGMP Membership Report messages (IGMP joins) as shown in the example below:
interface ethernet x/x/x
ip address x.0.1.2 255.255.255.252
ip pim-sparse
ip igmp version 3
ip igmp access-group IGMP_JOIN_FILTER

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

Check Content Reference

M

Target Key

5696