STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide Version: 2 Release: 6 Benchmark Date: 01 Jul 2026:

TOSS must not respond to Internet Control Message Protocol (ICMP) echoes sent to a broadcast address.

DISA Rule

SV-253128r991589_rule

Vulnerability Number

V-253128

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

TOSS-04-040870

Severity

CAT II

CCI(s)

• CCI-000366 - Implement the security configuration settings.

Weight

10

Fix Recommendation

Configure TOSS to not respond to IPv4 ICMP echoes sent to a broadcast address with the following command:

$ sudo sysctl -w net.ipv4.icmp_echo_ignore_broadcasts=1

If "1" is not the system's default value then add or update the following line in the appropriate file under "/etc/sysctl.d":

net.ipv4.icmp_echo_ignore_broadcasts=1

Check Contents

Verify TOSS does not respond to ICMP echoes sent to a broadcast address.

Note: If IPv4 is disabled on the system, this requirement is Not Applicable.
Check the value of the "icmp_echo_ignore_broadcasts" variable with the following command:

$ sudo sysctl net.ipv4.icmp_echo_ignore_broadcasts

net.ipv4.icmp_echo_ignore_broadcasts = 1

If the returned line does not have a value of "1", a line is not returned, or the retuned line is commented out, this is a finding.

Vulnerability Number

V-253128

Documentable

False

Rule Version

TOSS-04-040870

Severity Override Guidance

Verify TOSS does not respond to ICMP echoes sent to a broadcast address.

Note: If IPv4 is disabled on the system, this requirement is Not Applicable.
Check the value of the "icmp_echo_ignore_broadcasts" variable with the following command:

$ sudo sysctl net.ipv4.icmp_echo_ignore_broadcasts

net.ipv4.icmp_echo_ignore_broadcasts = 1

If the returned line does not have a value of "1", a line is not returned, or the retuned line is commented out, this is a finding.

Check Content Reference

M

Target Key

5469