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 forward Internet Protocol version 4 (IPv4) source-routed packets by default.

DISA Rule

SV-281347r1167191_rule

Vulnerability Number

V-281347

Group Title

SRG-OS-000420-GPOS-00186

Rule Version

RHEL-10-800150

Severity

CAT II

CCI(s)

• CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.
• CCI-001102 - Implement a managed interface for each external telecommunication service.

Weight

10

Fix Recommendation

Configure RHEL 10 to not forward IPv4 source-routed packets by default.

Create a configuration file if it does not already exist:

$ sudo vi /etc/sysctl.d/99-ipv4_accept_source_route.conf

Add the following line to the file:

net.ipv4.conf.default.accept_source_route = 0

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

$ sudo sysctl --system

Check Contents

Verify RHEL 10 does not accept IPv4 source-routed packets by default.

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

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

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

Vulnerability Number

V-281347

Documentable

False

Rule Version

RHEL-10-800150

Severity Override Guidance

Verify RHEL 10 does not accept IPv4 source-routed packets by default.

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

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

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

Check Content Reference

M

Target Key

5733