STIGQter: STIG Summary: Arista MLS EOS 4.X Router Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 02 Apr 2025:

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

DISA Rule

SV-256043r882471_rule

Vulnerability Number

V-256043

Group Title

SRG-NET-000364-RTR-000112

Rule Version

ARST-RT-000640

Severity

CAT II

CCI(s)

• CCI-002403 - Only allow 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 IP Proxy ARP on all external interfaces.

LEAF-1A(config)#int ethernet 3
LEAF-1A(config-if-Et3)#no ip proxy-arp

Check Contents

This requirement is not applicable for the DODIN backbone.

Review the Arista router configuration to determine if IP Proxy ARP is disabled on all external interfaces. Execute the command "sh run int ethernet YY".

int ethernet 3
no ip proxy-arp

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

Vulnerability Number

V-256043

Documentable

False

Rule Version

ARST-RT-000640

Severity Override Guidance

This requirement is not applicable for the DODIN backbone.

Review the Arista router configuration to determine if IP Proxy ARP is disabled on all external interfaces. Execute the command "sh run int ethernet YY".

int ethernet 3
no ip proxy-arp

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

Check Content Reference

M

Target Key

5513