Canon LBP7660Cdn Manual page 753

If you want to select all ports
Select the [All Ports] check box.
If you want to select a single port
(1) Select the [Single Port] check box.
(2) Enter the port number (0 to 65535).
7
Set [IKE Mode] and [AUTH Method] under [IKE Settings].
(1) Select [Main] or [Aggressive] under [IKE Mode].
(2) Select [AUTH Method].
If you want to specify [Pre-Shared Key Method]
a. Select the [Pre-Shared Key Method] check box.
b. Click [Shared Key Settings...].
c. Enter the name of the shared key (up to 24 characters), and click [OK].
If you want to specify [Digital Signature Method]
a. Select the [Digital Signature Method] check box.
b. Click [Key and Certificate...].
c. Select the key to use, and then click [Default Key Settings].
NOTE
[AUTH Method] Settings
In order to set [Pre-Shared Key Method], the SSL encrypted communication function must be enabled.
"Setting the SSL Encryption Communication Function"
We recommend that network settings be performed by the network administrator.
"Setting Keys and Certificates"
8
Set [Authentication/Encryption Algorithm] under [IKE Settings].