Detections
Analytics

1.9 CISC-RT-000180

Information

The Cisco switch must be configured to have Internet Control Message Protocol (ICMP) mask reply messages disabled on all external interfaces.

GROUP ID: V-220434
RULE ID: SV-220434r856236

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. Mask Reply ICMP messages are commonly used by attackers for network mapping and diagnosis.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Disable ip mask-reply on all external interfaces as shown below:

SW1(config)#int g0/1
SW1(config-if)#no ip mask-reply

See Also

https://workbench.cisecurity.org/benchmarks/26601

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5, CCI|CCI-002385, Rule-ID|SV-220434r856236_rule, STIG-ID|CISC-RT-000180, Vuln-ID|V-220434

Plugin: Cisco

Control ID: db91b7b2dfd39ab37afed96e7ce8990f90ec7cfab15ed7e1894e2f30a6544e02