STIGQter: STIG Summary: Red Hat Enterprise Linux 10 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 01 Jul 2026:

RHEL 10 must prevent Internet Protocol version 4 (IPv4) Internet Control Message Protocol (ICMP) redirect messages from being accepted.

DISA Rule

SV-281346r1197251_rule

Vulnerability Number

V-281346

Group Title

SRG-OS-000420-GPOS-00186

Rule Version

RHEL-10-800140

Severity

CAT II

CCI(s)

CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.
CCI-001101 - Limit the number of external network connections to the system.

Weight

Fix Recommendation

Configure RHEL 10 to prevent IPv4 ICMP redirect messages from being accepted.

Create a configuration file if it does not already exist:

$ sudo vi /etc/sysctl.d/99-ipv4_accept_redirects.conf

Add the following line to the file:

net.ipv4.conf.default.accept_redirects = 0

Reload settings from all system configuration files with the following command:

$ sudo sysctl --system

Check Contents

Verify RHEL 10 will not accept IPv4 ICMP redirect messages.

Check the value of the default "net.ipv4.conf.default.accept_redirects" variable with the following command:

$ sudo sysctl net.ipv4.conf.default.accept_redirects
net.ipv4.conf.default.accept_redirects = 0

If "net.ipv4.conf.default.accept_redirects" is not set to "0" or is missing, this is a finding.

Vulnerability Number

V-281346

Documentable

False

Rule Version

RHEL-10-800140

Severity Override Guidance

Check Content Reference

Target Key

5733