The A10 Networks ADC must protect against ICMP-based Denial of Service (DoS) attacks by employing ICMP Rate Limiting.

From A10 Networks ADC ALG Security Technical Implementation Guide

Part of SRG-NET-000362-ALG-000112

Associated with: CCI-002385

SV-82515r1_rule The A10 Networks ADC must protect against ICMP-based Denial of Service (DoS) attacks by employing ICMP Rate Limiting.

Vulnerability discussion

If the network does not provide safeguards against DoS attacks, network resources will be unavailable to users. Installation of content filtering gateways and application layer firewalls at key boundaries in the architecture mitigates the risk of DoS attacks. These attacks can be detected by matching observed communications traffic with patterns of known attacks and monitoring for anomalies in traffic volume/type.Detection components that use rate-based behavior analysis can detect attacks when signatures for the attack do not exist or are not installed. These attacks include zero-day attacks which are new attacks for which vendors have not yet developed signatures. Rate-based behavior analysis can detect sophisticated, Distributed DoS (DDoS) attacks by correlating traffic information from multiple network segments or components. The A10 Networks ADC provides an ICMP Rate Limiting feature that monitors the rate of ICMP traffic and drops ICMP packets when the configured thresholds (the normal rate) are exceeded.

Check content

Review the device configuration. The following command displays the device configuration and filters the output on the string "icmp-rate-limit": show run | inc icmp-rate-limit If ICMP rate limiting is not configured, this is a finding. If no lockout period and maximum rates are configured as an action, this is a finding.

Fix text

The following command configures ICMP rate limiting: icmp-rate-limit [normal-rate] lockup [max-rate] [lockup-time]

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