Configuring Access Point Security
6-49
IKE Authentication 
Mode 
Select the appropriate IKE authentication mode:
• Pre-Shared Key (PSK) - Specify an authenticating algorithm 
and passcode used during authentication. 
• RSA Certificates - Select this option to use RSA certificates 
for authentication purposes. See the CA Certificates and Self 
certificates screens to create and import certificates into the 
system. 
IKE Authentication 
Algorithm
IKE provides data authentication and anti-replay services for the 
VPN tunnel. Select an authentication methods from the drop-down 
menu.
• MD5 - Enables the Message Digest 5 algorithm. No keys are 
required to be manually provided.
• SHA1 - Enables Secure Hash Algorithm. No keys are 
required to be manually provided.
IKE Authentication 
Passphrase
If you selected Pre-Shared Key as the authentication mode, you 
must provide a passphrase.
IKE Encryption 
Algorithm
Select the encryption and authentication algorithms for the VPN 
tunnel from the drop-down menu.
• DES - Uses the DES encryption algorithm. No keys are 
required to be manually provided.
• 3DES - Enables the 3DES encryption algorithm. No keys are 
required to be manually provided.
• AES 128-bit - Uses the Advanced Encryption Standard 
algorithm with 128-bit. No keys are required to be manually 
provided.
• AES 192-bit - Enables the Advanced Encryption Standard 
algorithm with 192-bit. No keys are required to be manually 
provided.
• AES 256-bit - Uses the Advanced Encryption Standard 
algorithm with 256-bit. No keys are required to be manually 
provided.
Key Lifetime The number of seconds the key is valid. At the end of the lifetime, 
the key is renegotiated. 
The access point forces renegotiation every 3600 seconds. There is 
no way to change the renegotiation value. If the IKE Lifetime is 
greater than 3600, the keys still get renegotiated every 3600 
seconds.