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Configuring an IKE Proposal

An IKE proposal determines the authentication method, authentication and encryption algorithms, lifetime for the authentication and encryption keys, and the Diffie-Hellman group that determines the cryptographic strength of the key negotiation. You can configure one or more IKE proposals.

To configure an IKE proposal:

  1. Navigate to the top of the configuration hierarchy in either the J-Web or CLI configuration editor.
  2. Perform the configuration tasks described in Table 30.
  3. Go on to Configuring an IKE Policy.

Table 30: Configuring IKE Proposal

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Services>Ipsec vpn>Ike level in the configuration hierarchy.

  1. In the J-Web interface, select Configuration>View and Edit>Edit Configuration.
  2. Next to Services, click Configure or Edit.
  3. Next to Ipsec vpn, click Configure or Edit.
  4. Next to Ike, click Configure.

From the [edit] hierarchy level, enter

edit services ipsec-vpn ike

Configure an IKE proposal—for example, ike-dynamic-proposal—that defines the authentication method, authentication and encryption algorithms, and the lifetime of the keys.

  1. Next to Proposal, click Add new entry.
  2. In the Name box, type ike-dynamic-proposal.

Enter

set proposal ike-dynamic-proposal

Configure the authentication algorithm—for example, sha1.

In the Authentication algorithm box, select sha1.

Enter

set proposal ike-dynamic-proposal authentication-algorithm sha1

Configure the authentication method—for example, pre-shared-keys.

Note: Alternatively, you can use digital certificates as an authentication method. For details, see Configuring Digital Certificates for IPSec Tunnels.

In the Authentication method box, select pre-shared-keys.

Enter

set proposal ike-dynamic-proposal authentication-method pre-shared-keys

Configure the Diffie-Helman group to be used for key negotiations—for example, group1.

In the Dh group box, select group1.

Enter

set proposal ike-dynamic-proposal dh-group group1

Configure an encryption algorithm—for example, 3des-cbc.

In the Encryption algorithm box, select 3des-cbc.

Enter

set proposal ike-dynamic-proposal encryption-algorithm 3des-cbc

Configure the lifetime (in seconds) of the encryption and authentication keys—for example, 3600.

  1. In the Lifetime seconds box, type 3600.
  2. Click OK until you return to the Configuration page.

Enter

set proposal ike-dynamic-proposal lifetime-seconds 3600


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