The Arista router must be configured to have Internet Control Message Protocol (ICMP) redirects disabled on all external interfaces.
An XCCDF Rule
Description
The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Routers automatically send ICMP messages under a wide variety of conditions. Redirect ICMP messages are commonly used by attackers for network mapping and diagnosis.
- ID
- SV-256034r882444_rule
- Version
- ARST-RT-000550
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
Step 1: Disable ICMP redirects on all external interfaces.
ip access-group DENY_REDIRECT
deny icmp any any redirect
permit ip any any