Control: ism-0998; Revision: 5; Updated: Mar-22; Applicability: ALL; Essential Eight: N/A ​

AUTH_HMAC_SHA2_256_128, AUTH_HMAC_SHA2_384_192, AUTH_HMAC_SHA2_512_256 or NONE (only with AES-GCM) is used for authenticating IPsec connections, preferably NONE.