The Juniper router must be configured to have Internet Control Message Protocol (ICMP) redirect messages 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-217024r855892_rule
- Version
- JUNI-RT-000190
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
Disable ICMP redirects on all external interfaces as shown in the example below.
[edit interfaces]
set ge-1/0/0 unit 0 family inet no-redirects
set ge-1/1/0 unit 0 family inet no-redirects