AIX must not respond to ICMPv6 echo requests sent to a broadcast address.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-215430 | SRG-OS-000480-GPOS-00227 | AIX7-00-003135 | SV-215430r991589_rule | 2026-02-06 | 3 |
Description
Responding to broadcast ICMP echo requests facilitates network mapping and provides a vector for amplification attacks.
ℹ️ Check
From the command prompt, run the following command:
# /usr/sbin/no -o bcastping
bcastping = 0
If the value returned is not "0", this is a finding.
✔️ Fix
Configure the system to not respond to IPv6 multicast ICMP ECHO_REQUESTs by running:
# /usr/sbin/no -p -o bcastping=0