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 filter egress traffic at the internal interface on an inbound direction.

DISA Rule

SV-216762r531087_rule

Vulnerability Number

V-216762

Group Title

SRG-NET-000205-RTR-000005

Rule Version

CISC-RT-000340

Severity

CAT II

CCI(s)

• CCI-001097 - The information system monitors and controls communications at the external boundary of the information system and at key internal boundaries within the system.

Weight

10

Fix Recommendation

This requirement is not applicable for the DODIN Backbone.

Configure the router to use an inbound ACL on all internal interfaces as shown in the example below.

RP/0/0/CPU0:R3(config)#int g0/0/0/1
RP/0/0/CPU0:R3(config-if)#ipv4 access-group EGRESS_FILTER in
RP/0/0/CPU0:R3(config-if)#end

Check Contents

This requirement is not applicable for the DODIN Backbone.

Review the router configuration to verify that the egress ACL is bound to the internal interface in an inbound direction.

interface GigabitEthernet0/0/0/1
description downstream link to LAN
ipv4 address 10.1.34.3 255.255.255.0
ipv4 access-group EGRESS_FILTER ingress

If the router is not configured to filter traffic leaving the network at the internal interface in an inbound direction, this is a finding.

Vulnerability Number

V-216762

Documentable

False

Rule Version

CISC-RT-000340

Severity Override Guidance

This requirement is not applicable for the DODIN Backbone.

Review the router configuration to verify that the egress ACL is bound to the internal interface in an inbound direction.

interface GigabitEthernet0/0/0/1
description downstream link to LAN
ipv4 address 10.1.34.3 255.255.255.0
ipv4 access-group EGRESS_FILTER ingress

If the router is not configured to filter traffic leaving the network at the internal interface in an inbound direction, this is a finding.

Check Content Reference

M

Target Key

4029

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