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    Specifying IPsec Security Association PFS and DH Group Parameters

    You can specify the IPsec SA perfect forward secrecy (PFS) option and Diffie-Hellman prime modulus group that IPsec SA negotiations can use for this profile.

    Note: When the client initiates the IPsec negotiation, the router can accept Diffie-Hellman prime modulus groups that are higher than those configured.

    To configure perfect forward secrecy for connections created with this IPsec tunnel configuration profile by assigning a Diffie-Hellman prime modulus group:

    • From IPsec Tunnel Profile Configuration mode, specify the perfect forward secrecy.
      host1(config-ipsec-tunnel-profile)#pfs group 5

      Use the no version to remove PFS from the profile.

    Published: 2014-08-12