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

The Arista BGP router must be configured to enable the Generalized TTL Security Mechanism (GTSM).

DISA Rule

SV-256039r882459_rule

Vulnerability Number

V-256039

Group Title

SRG-NET-000362-RTR-000124

Rule Version

ARST-RT-000600

Severity

CAT III

CCI(s)

• CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.

Weight

10

Fix Recommendation

Configure all Exterior Border Gateway Protocol peering sessions to use GTSM.

router bgp 65000
neighbor 10.1.12.2 ttl maximum-hops 2

Check Contents

Review the Arista router configuration.

Arista MLS IP packets to GTSM enabled BGP peers are sent with the configured TTL value of 254.

router bgp NNN
neighbor 10.1.12.2 ttl maximum-hops 2

If the Arista router is not configured to use GTSM for all Exterior Border Gateway Protocol peering sessions, this is a finding.

Vulnerability Number

V-256039

Documentable

False

Rule Version

ARST-RT-000600

Severity Override Guidance

Review the Arista router configuration.

Arista MLS IP packets to GTSM enabled BGP peers are sent with the configured TTL value of 254.

router bgp NNN
neighbor 10.1.12.2 ttl maximum-hops 2

If the Arista router is not configured to use GTSM for all Exterior Border Gateway Protocol peering sessions, this is a finding.

Check Content Reference

M

Target Key

5513