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

Overriding the system crypto policy makes the behavior of the Libreswan service violate expectations and makes system configuration more fragmented.

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.

Configure IPsec to use the systemwide cryptographic policy.

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

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