STIGQter: STIG Summary: Cisco IOS XE Router RTR Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 23 Apr 2021:

The Cisco multicast router must be configured to bind a Protocol Independent Multicast (PIM) neighbor filter to interfaces that have PIM enabled.

DISA Rule

SV-216718r531086_rule

Vulnerability Number

V-216718

Group Title

SRG-NET-000019-RTR-000004

Rule Version

CISC-RT-000800

Severity

CAT II

CCI(s)

• CCI-001414 - The information system enforces approved authorizations for controlling the flow of information between interconnected systems based on organization-defined information flow control policies.

Weight

10

Fix Recommendation

This requirement is not applicable for the DODIN Backbone.

Configure neighbor ACLs to only accept PIM control plane traffic from documented PIM neighbors. Bind neighbor ACLs to all PIM enabled interfaces.

Step 1: Configure ACL for PIM neighbors.

R2(config)#ip access-list standard PIM_NEIGHBORS
R2(config-std-nacl)#permit 10.1.2.6
R2(config-std-nacl)#exit

Step 2: Apply the ACL to all interfaces enabled for PIM.

R2(config)#int g1/1
R2(config-if)#ip pim neighbor-filter PIM_NEIGHBORS

Check Contents

This requirement is not applicable for the DODIN Backbone.

Step 1: Verify all interfaces enabled for PIM have a neighbor ACL bound to the interface as shown in the example below:

interface GigabitEthernet1/1
ip address 10.1.2.2 255.255.255.0
ip pim neighbor-filter PIM_NEIGHBORS
ip pim sparse-mode

Step 2: Review the configured ACL for filtering PIM neighbors as shown in the example below:

ip access-list standard PIM_NEIGHBORS
permit 10.1.2.6

If PIM neighbor ACLs are not bound to all interfaces that have PIM enabled, this is a finding.

Vulnerability Number

V-216718

Documentable

False

Rule Version

CISC-RT-000800

Severity Override Guidance

This requirement is not applicable for the DODIN Backbone.

Step 1: Verify all interfaces enabled for PIM have a neighbor ACL bound to the interface as shown in the example below:

interface GigabitEthernet1/1
ip address 10.1.2.2 255.255.255.0
ip pim neighbor-filter PIM_NEIGHBORS
ip pim sparse-mode

Step 2: Review the configured ACL for filtering PIM neighbors as shown in the example below:

ip access-list standard PIM_NEIGHBORS
permit 10.1.2.6

If PIM neighbor ACLs are not bound to all interfaces that have PIM enabled, this is a finding.

Check Content Reference

M

Target Key

4028

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