Changes are coming to https://stigviewer.com.
Take our survey to help us understand your usage and how we can better serve you in the future.
Take Survey
The Cisco 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-96535 | CISC-RT-000190 | SV-105673r1_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 |
|---|---|
| Cisco IOS Router RTR Security Technical Implementation Guide | 2019-12-20 |
Details
| Check Text ( C-95371r1_chk ) |
|---|
| Review the router configuration to verify that the no ip redirects command has been configured on all external interfaces as shown in the example below. interface GigabitEthernet0/1 ip address x.x.x.x 255.255.255.0 no ip redirects If ICMP Redirect messages are enabled on any external interfaces, this is a finding. |
| Fix Text (F-102211r1_fix) |
|---|
| Disable ICMP redirects on all external interfaces as shown in the example below. R4(config)#int g0/1 R4(config-if)#no ip redirects |