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 prevent IPv4 Internet Control Message Protocol (ICMP) redirect messages from being accepted.

DISA Rule

SV-282690r1201050_rule

Vulnerability Number

V-282690

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

TOSS-05-000218

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure TOSS 5 to prevent IPv4 ICMP redirect messages from being accepted.

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

net.ipv4.conf.default.accept_redirects = 0

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

$ sudo sysctl --system

Check Contents

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

$ sudo sysctl net.ipv4.conf.default.accept_redirects

net.ipv4.conf.default.accept_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-282690

Documentable

False

Rule Version

TOSS-05-000218

Severity Override Guidance

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

$ sudo sysctl net.ipv4.conf.default.accept_redirects

net.ipv4.conf.default.accept_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