Brother SP-1 Online User's Manual page 123

IKEv1 Settings for an IPsec Template
Option
Template Name
Use Prefixed Template
Internet Key Exchange (IKE)
Authentication Type
119
Description
Type a name for the template (up to 16 characters).
Select Custom, IKEv1 High Security or IKEv1 Medium Security. The
setting items are different depending on the selected template.
IKE is a communication protocol that is used to exchange encryption keys in
order to carry out encrypted communication using IPsec. To carry out
encrypted communication for that time only, the encryption algorithm that is
necessary for IPsec is determined and the encryption keys are shared. For
IKE, the encryption keys are exchanged using the Diffie-Hellman key
exchange method, and encrypted communication that is limited to IKE is
carried out.
If you selected Custom in Use Prefixed Template, select IKEv1.
• Diffie-Hellman Group
This key exchange method allows secret keys to be securely exchanged
over an unprotected network. The Diffie-Hellman key exchange method
uses a discrete logarithm problem, not the secret key, to send and
receive open information that was generated using a random number and
the secret key.
Select Group1, Group2, Group5, or Group14.
• Encryption
Select DES, 3DES, AES-CBC 128, or AES-CBC 256.
• Hash
Select MD5, SHA1, SHA256, SHA384 or SHA512.
• SA Lifetime
Specify the IKE SA lifetime.
Type the time (seconds) and number of kilobytes (KByte).