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

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECSC-1

Associated with: CCI-001551

SV-38797r1_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

# /usr/sbin/no -o bcastping If the value returned is not 0, this is a finding.

Fix text

Configure the system to ignore ICMP ECHO_REQUESTs sent to broadcast addresses. # no -po bcastping=0

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