CASA-VN-000210 - The Cisco ASA must be configured to use a Diffie-Hellman (DH) Group of 16 or greater for Internet Key Exchange (IKE) Phase 1 - IKE Phase 1.


Use of an approved DH algorithm ensures the IKE (Phase 1) proposal uses FIPS-validated key management techniques and processes in the production, storage, and control of private/secret cryptographic keys. The security of the DH key exchange is based on the difficulty of solving the discrete logarithm from which the key was derived. Hence, the larger the modulus, the more secure the generated key is considered to be.


Configure the ASA to use a DH Group of 16 or greater as shown in the example below.

ASA1(config)# crypto ikev2 policy 1
ASA1(config-ikev2-policy)# group 24

See Also

Item Details


References: 800-53|AC-17(2), CAT|I, CCI|CCI-000068, Rule-ID|SV-239957r916149_rule, STIG-ID|CASA-VN-000210, Vuln-ID|V-239957

Plugin: Cisco

Control ID: 42f661e0c4c5a47c2f680b9c0dcfe91d76e123a23022c8fa2e4be16a19b78643