DISA STIGS Viewer

The Juniper router must be configured to have Internet Control Message Protocol (ICMP) redirect messages disabled on all external interfaces.

Overview

Finding ID Version Rule ID IA Controls Severity
V-217024 JUNI-RT-000190 SV-217024r855892_rule   Medium
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.
STIG Date
Juniper Router RTR Security Technical Implementation Guide 2024-12-05

Details

Check Text (C-18253r296940_chk)
Review the device configuration to determine if it has been configured to ensure the router does not send ICMP Redirect messages out to any external interface.

interfaces {
ge-1/0/0 {
unit 0 {
family inet {
no-redirects;
address 11.1.12.2/24;
}
}
}
ge-1/1/0 {
unit 0 {
family inet {
no-redirects;
address 11.1.23.2/24;
}
}
}

If ICMP Redirect messages are enabled on any external interfaces, this is a finding.
Fix Text (F-18251r296941_fix)
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