Brother DCP-L5500D User Manual page 468

SA (Security Association) is an encrypted communication method using IPsec or IPv6 that exchanges and
shares information, such as the encryption method and encryption key, in order to establish a secure
communication channel before communication begins. SA may also refer to a virtual encrypted
communication channel that has been established. The SA used for IPsec establishes the encryption
method, exchanges the keys, and carries out mutual authentication according to the IKE (Internet Key
Exchange) standard procedure. In addition, the SA is updated periodically.
Perfect Forward Secrecy (PFS)
PFS does not derive keys from previous keys that were used to encrypt messages. In addition, if a key that is
used to encrypt a message was derived from a parent key, that parent key is not used to derive other keys.
Therefore, even if a key is compromised, the damage will be limited only to the messages that were encrypted
using that key.
Select Enabled or Disabled.
Authentication Method
Select the authentication method. Select Pre-Shared Key, Certificates, EAP - MD5, or EAP - MS-CHAPv2.
Pre-Shared Key
When encrypting communication, the encryption key is exchanged and shared beforehand using another
channel.
If you selected Pre-Shared Key for the Authentication Method, type the Pre-Shared Key (up to 32
characters).
• Local/ID Type/ID
Select the sender's ID type, and then type the ID.
Select IPv4 Address, IPv6 Address, FQDN, E-mail Address, or Certificate for the type.
If you select Certificate, type the common name of the certificate in the ID field.
• Remote/ID Type/ID
Select the recipient's ID type, and then type the ID.
Select IPv4 Address, IPv6 Address, FQDN, E-mail Address, or Certificate for the type.
If you select Certificate, type the common name of the certificate in the ID field.
Certificate
If you selected Certificates for Authentication Method, select the certificate.
You can select only the certificates that were created using the Certificate page of Web Based
Management's Security configuration screen.
EAP
EAP is an authentication protocol that is an extension of PPP. By using EAP with IEEE802.1x, a different key
is used for user authentication during each session.
The following settings are necessary only when EAP - MD5 or EAP - MS-CHAPv2 is selected in
Authentication Method:
• Mode
Select Server-Mode or Client-Mode.
• Certificate
Select the certificate.
• User Name
Type the user name (up to 32 characters).
• Password
Type the password (up to 32 characters). The password must be entered two times for confirmation.
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