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 enable Internet Protocol version 4 (IPv4) packet forwarding unless the system is a router.

DISA Rule

SV-281353r1167209_rule

Vulnerability Number

V-281353

Group Title

SRG-OS-000420-GPOS-00186

Rule Version

RHEL-10-800210

Severity

CAT II

CCI(s)

CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.
CCI-001108 - Remove traffic flow policy exceptions that are no longer supported by an explicit mission or business need for each external telecommunication service.

Weight

Fix Recommendation

Configure RHEL 10 to not allow IPv4 packet forwarding unless the system is a router.

Create a configuration file if it does not already exist:

$ sudo vi /etc/sysctl.d/ipv4_forwarding.conf

Add the following line to the file:

net.ipv4.conf.all.forwarding = 0

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

$ sudo sysctl --system

Check Contents

Verify RHEL 10 is not performing IPv4 packet forwarding unless the system is a router.

Check that "net.ipv4.conf.all.forwarding" is disabled using the following command:

$ sudo sysctl net.ipv4.conf.all.forwarding
net.ipv4.conf.all.forwarding = 0

If "net.ipv4.conf.all.forwarding" 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-281353

Documentable

False

Rule Version

RHEL-10-800210

Severity Override Guidance

Check Content Reference

Target Key

5733