STIGQter: STIG Summary: Dell OS10 Switch Router Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 01 Apr 2026:

The Dell OS10 multicast Rendezvous Point (RP) router must be configured to filter Protocol Independent Multicast (PIM) Join messages received from the Designated Router (DR) for any undesirable multicast groups.

DISA Rule

SV-269866r1137932_rule

Vulnerability Number

V-269866

Group Title

SRG-NET-000019-RTR-000014

Rule Version

OS10-RTR-000230

Severity

CAT III

CCI(s)

• CCI-001414 - Enforce approved authorizations for controlling the flow of information between connected systems based on organization-defined information flow control policies.

Weight

10

Fix Recommendation

Configure the RP to filter PIM join messages for any undesirable multicast groups.

Step 1: Configure an ACL that identifies which groups are allowed to join.

OS10(config)# ip access-list PIM_JOINFILTER
OS10(config-ipv4-acl)# permit ip 10.10.10.0/24 226.1.1.0/24
OS10(config-ipv4-acl)# permit ip any 225.1.1.0/24

Step 2: Configure a PIM join filter on the PIM interfaces.

OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# ip pim join-filter PIM_JOINFILTER

NOTES:

* Dell Technologies recommends not using the IP PIM join-filter command on an interface between a source and the RP router. Using this command in this scenario could cause problems with the PIM-SM source registration process resulting in excessive traffic being sent to the CPU of both the RP and PIM DR of the source. Excessive traffic generates when the join process from the RP back to the source is blocked due to a new source group being permitted in the join-filter. This results in the new source becoming stuck in registering on the DR and the continuous generation of UDP-encapsulated registration messages between the DR and RP routers which are sent to the CPU.

* Do not to configure a PIM join-filter on a source connected interface (IIF) on first hop router (FHR) node. Applying PIM join-filter with the rule, deny ip any any might block creation of the S,G entries.

* When configuring a join filter, it applies for both incoming and outgoing joins. There is no option to specify in or out parameters while configuring a join filter.

Check Contents

Verify the RP router is configured to filter PIM join messages for any undesirable multicast groups.

!
interface vlan100
no shutdown
ip pim sparse-mode
ip pim join-filter PIM_JOINFILTER

!
ip access-list PIM_JOINFILTER
seq 10 permit ip 10.10.10.0/24 226.1.1.0/24
seq 20 permit ip any 225.1.1.0/24

If the RP is not configured to filter join messages received from the DR for any undesirable multicast groups, this is a finding.

Vulnerability Number

V-269866

Documentable

False

Rule Version

OS10-RTR-000230

Severity Override Guidance

Verify the RP router is configured to filter PIM join messages for any undesirable multicast groups.

!
interface vlan100
no shutdown
ip pim sparse-mode
ip pim join-filter PIM_JOINFILTER

!
ip access-list PIM_JOINFILTER
seq 10 permit ip 10.10.10.0/24 226.1.1.0/24
seq 20 permit ip any 225.1.1.0/24

If the RP is not configured to filter join messages received from the DR for any undesirable multicast groups, this is a finding.

Check Content Reference

M

Target Key

5668