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

RHEL 10 must not allow interfaces to perform Internet Control Message Protocol (ICMP) redirects by default.

DISA Rule

SV-281352r1184706_rule

Vulnerability Number

V-281352

Group Title

SRG-OS-000420-GPOS-00186

Rule Version

RHEL-10-800200

Severity

CAT II

CCI(s)

CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.
CCI-001107 - Defines a frequency for the review of exceptions to the traffic flow policy for each external telecommunication service.

Weight

Fix Recommendation

Configure RHEL 10 to not allow interfaces to perform IPv4 ICMP redirects by default.

Create a configuration file if it does not already exist:

$ sudo vi /etc/sysctl.d/ipv4_send_redirects.conf

Add the following line to the file:

net.ipv4.conf.default.send_redirects = 0

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

$ sudo sysctl --system

Check Contents

Verify RHEL 10 does not allow interfaces to perform Internet Protocol version 4 (IPv4) ICMP redirects by default.

Check the value of the "net.ipv4.conf.default.send_redirects" variables with the following command:

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

If "net.ipv4.conf.default.send_redirects" is not set to "0" and is not documented with the information system security officer as an operational requirement or is missing, this is a finding.

Vulnerability Number

V-281352

Documentable

False

Rule Version

RHEL-10-800200

Severity Override Guidance

Check Content Reference

Target Key

5733