STIGQter STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

TOSS 5 must not send Internet Control Message Protocol (ICMP) redirects.

DISA Rule

SV-282695r1201065_rule

Vulnerability Number

V-282695

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

TOSS-05-000223

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure TOSS 5 to not allow interfaces to perform IPv4 ICMP redirects.

Add or edit the following line in a single system configuration file, in the "/etc/sysctl.d/" directory:

net.ipv4.conf.all.send_redirects = 0

Load settings from all system configuration files using the following command:

$ sudo sysctl --system

Check Contents

Verify TOSS 5 does not IPv4 ICMP redirect messages using the following command:

$ sudo sysctl net.ipv4.conf.all.send_redirects

net.ipv4.conf.all.send_redirects = 0

If the returned line does not have a value of "0", or a line is not returned, this is a finding.

Vulnerability Number

V-282695

Documentable

False

Rule Version

TOSS-05-000223

Severity Override Guidance

Verify TOSS 5 does not IPv4 ICMP redirect messages using the following command:

$ sudo sysctl net.ipv4.conf.all.send_redirects

net.ipv4.conf.all.send_redirects = 0

If the returned line does not have a value of "0", or a line is not returned, this is a finding.

Check Content Reference

M

Target Key

5738