STIGQter: STIG Summary: Oracle Linux 9 Security Technical Implementation Guide Version: 1 Release: 6 Benchmark Date: 01 Jul 2026:

OL 9 IP tunnels must use 140-3 approved cryptographic algorithms.

DISA Rule

SV-271743r1184204_rule

Vulnerability Number

V-271743

Group Title

SRG-OS-000033-GPOS-00014

Rule Version

OL09-00-002404

Severity

CAT I

CCI(s)

• CCI-000068 - Implement cryptographic mechanisms to protect the confidentiality of remote access sessions.

Weight

10

Fix Recommendation

Configure IPsec to use the systemwide cryptographic policy.

Add the following line to "/etc/ipsec.conf":

include /etc/crypto-policies/back-ends/libreswan.config

Check Contents

Note: If the IPsec service is not installed, this requirement is Not Applicable.

Verify the IPsec service uses the systemwide cryptographic policy with the following command:

$ grep include /etc/ipsec.conf /etc/ipsec.d/*.conf
/etc/ipsec.conf:include /etc/crypto-policies/back-ends/libreswan.config

If the IPsec configuration file does not contain "include /etc/crypto-policies/back-ends/libreswan.config", this is a finding.

Vulnerability Number

V-271743

Documentable

False

Rule Version

OL09-00-002404

Severity Override Guidance

Note: If the IPsec service is not installed, this requirement is Not Applicable.

Verify the IPsec service uses the systemwide cryptographic policy with the following command:

$ grep include /etc/ipsec.conf /etc/ipsec.d/*.conf
/etc/ipsec.conf:include /etc/crypto-policies/back-ends/libreswan.config

If the IPsec configuration file does not contain "include /etc/crypto-policies/back-ends/libreswan.config", this is a finding.

Check Content Reference

M

Target Key

5680