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 switch 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-221085 | CISC-RT-000190 | SV-221085r622190_rule | Medium |
| Description |
|---|
| The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Switches 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 NX-OS Switch RTR Security Technical Implementation Guide | 2021-03-29 |
Details
| Check Text ( C-22800r409744_chk ) |
|---|
| Review the switch configuration to verify that the no ip redirects command has been configured on all external interfaces as shown in the example below: interface Ethernet2/7 no switchport ip address x.22.4.2/30 no ip redirects If ICMP Redirect messages are enabled on any external interfaces, this is a finding. |
| Fix Text (F-22789r409745_fix) |
|---|
| Disable ICMP redirects on all external interfaces as shown in the example below: SW1(config)# int e2/7 SW1(config-if)# no ip redirects |