STIGQter: STIG Summary: Cisco NX-OS Switch RTR Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Apr 2021:

The Cisco perimeter switch must be configured to filter egress traffic at the internal interface on an inbound direction.

DISA Rule

SV-221094r622190_rule

Vulnerability Number

V-221094

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

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

SW1(config)# int e2/4
SW1(config-if)# ip access-group EGRESS_FILTER in
SW1(config-if)# end

Check Contents

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

interface Ethernet2/4
description downstream link to LAN
no switchport
ip access-group EGRESS_FILTER in
ip address 10.1.12.1/24

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

Vulnerability Number

V-221094

Documentable

False

Rule Version

CISC-RT-000340

Severity Override Guidance

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

interface Ethernet2/4
description downstream link to LAN
no switchport
ip access-group EGRESS_FILTER in
ip address 10.1.12.1/24

If the switch 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

4075

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