Cisco PIX-515E Quick Start Manual - Page 22

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Step 3: Configure the IKE Policy

IKE is a negotiation protocol that includes an encryption method to protect data and ensure privacy,

and an authentication method to ensure the identity of the peers. In most cases, the ASDM default

values are sufficient to establish secure VPN tunnels between two peers.

To specify the IKE policy, complete the following steps:

1. Select the Encryption (DES/3DES/AES), Authentication algorithms (MD5/SHA), and the

Diffie-Hellman group (1/2/5) used by the security appliance during an IKE security association.

Note

When configuring PIX 2, enter the exact values for each of the options that you chose for

PIX 1. Encryption mismatches are a common cause of VPN tunnel failures and can slow

down the process.

2. Click the Next button to continue.