STIGQter 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 ignore IPv4 Internet Control Message Protocol (ICMP) redirect messages.

DISA Rule

SV-253118r991589_rule

Vulnerability Number

V-253118

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

TOSS-04-040770

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure TOSS to ignore IPv4 ICMP redirect messages with the following command:

$ sudo sysctl -w net.ipv4.conf.all.accept_redirects=0

If "0" is not the system's default value then add or update the following line in the appropriate file under "/etc/sysctl.d":

net.ipv4.conf.all.accept_redirects = 0

Check Contents

Verify TOSS ignores IPv4 ICMP redirect messages.

Note: If IPv4 is disabled on the system, this requirement is Not Applicable.

Check the value of the "accept_redirects" variables with the following command:

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

net.ipv4.conf.all.accept_redirects = 0

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

Vulnerability Number

V-253118

Documentable

False

Rule Version

TOSS-04-040770

Severity Override Guidance

Verify TOSS ignores IPv4 ICMP redirect messages.

Note: If IPv4 is disabled on the system, this requirement is Not Applicable.

Check the value of the "accept_redirects" variables with the following command:

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

net.ipv4.conf.all.accept_redirects = 0

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

Check Content Reference

M

Target Key

5469