The system must not respond to ICMPv4 echoes sent to a broadcast address.

From HP-UX 11.31 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

Associated with: CCI-001551

SV-35025r1_rule The system must not respond to ICMPv4 echoes sent to a broadcast address.

Vulnerability discussion

Responding to broadcast Internet Control Message Protocol (ICMP) echoes facilitates network mapping and provides a vector for amplification attacks.

Check content

Fix text

Configure the system to not respond to ICMP ECHO_REQUESTs sent to broadcast addresses. # ndd -set /dev/ip ip_respond_to_echo_broadcast 0 Edit /etc/rc.config.d/nddconf and add/set: TRANSPORT_NAME[x]=ip NDD_NAME[x]=ip_respond_to_echo_broadcast NDD_VALUE[x]=0

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