STIGQter: STIG Summary: Cisco IOS XR Router RTR Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Oct 2020:

The Cisco perimeter router must be configured to have Proxy ARP disabled on all external interfaces.

DISA Rule

SV-216766r531087_rule

Vulnerability Number

V-216766

Group Title

SRG-NET-000364-RTR-000112

Rule Version

CISC-RT-000380

Severity

CAT II

CCI(s)

• CCI-002403 - The information system only allows incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations.

Weight

10

Fix Recommendation

This requirement is not applicable for the DODIN Backbone.

Disable Proxy ARP on all external interfaces as shown in the example below.

RP/0/0/CPU0:R3(config)#interface g0/0/0/1
RP/0/0/CPU0:R3(config-if)#no proxy-arp

Check Contents

This requirement is not applicable for the DODIN Backbone.

Review the router configuration to determine if IP Proxy ARP is enabled on any external interfaces as shown in the example below.

interface GigabitEthernet0/0/0/1
description link to DISN
ipv4 address x.1.12.2 255.255.255.252
proxy-arp

If IP Proxy ARP is enabled on any external interface, this is a finding.

Vulnerability Number

V-216766

Documentable

False

Rule Version

CISC-RT-000380

Severity Override Guidance

This requirement is not applicable for the DODIN Backbone.

Review the router configuration to determine if IP Proxy ARP is enabled on any external interfaces as shown in the example below.

interface GigabitEthernet0/0/0/1
description link to DISN
ipv4 address x.1.12.2 255.255.255.252
proxy-arp

If IP Proxy ARP is enabled on any external interface, this is a finding.

Check Content Reference

M

Target Key

4029

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