RHEL 8 IP tunnels must use FIPS 140-3-approved cryptographic algorithms.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-279930	SRG-OS-000033-GPOS-00014	RHEL-08-010280	SV-279930r1156343_rule	2025-11-24	2

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 system crypto policy with the following command: $ sudo grep include /etc/ipsec.conf /etc/ipsec.d/.conf /etc/ipsec.conf:include /etc/crypto-policies/back-ends/libreswan.config /etc/ipsec.conf:include /etc/ipsec.d/.conf If the ipsec configuration file does not contain "include /etc/crypto-policies/back-ends/libreswan.config", this is a finding.

ℹ️ Check

Note: If the ipsec service is not installed, this requirement is Not Applicable. Verify the IPsec service uses the system crypto policy with the following command: $ sudo grep include /etc/ipsec.conf /etc/ipsec.d/*.conf /etc/ipsec.conf:include /etc/crypto-policies/back-ends/libreswan.config /etc/ipsec.conf:include /etc/ipsec.d/*.conf If the ipsec configuration file does not contain "include /etc/crypto-policies/back-ends/libreswan.config", this is a finding.

✔️ Fix
Configure Libreswan to use the system cryptographic policy. Add the following line to "/etc/ipsec.conf": include /etc/crypto-policies/back-ends/libreswan.config