OL 9 IP tunnels must use 140-3 approved cryptographic algorithms.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| high | V-271743 | SRG-OS-000033-GPOS-00014 | OL09-00-002404 | SV-271743r1184204_rule | 2026-02-17 | 1 |
Description
Overriding the system crypto policy makes the behavior of the Libreswan service violate expectations and makes system configuration more fragmented.
ℹ️ Check
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.
✔️ Fix
Configure IPsec to use the systemwide cryptographic policy.
Add the following line to "/etc/ipsec.conf":
include /etc/crypto-policies/back-ends/libreswan.config