Download Certificate; Ciphersuite - D-Link xStack DES-3800 Series User Manual

current block. The Switch supports the 3DES EDE encryption code defined by the Data
Encryption Standard (DES) to create the encrypted text.
Hash Algorithm: This part of the ciphersuite allows the user to choose a message digest
3.
function which will determine a Message Authentication Code. This Message Authentication
Code will be encrypted with a sent message to provide integrity and prevent against replay
attacks. The Switch supports two hash algorithms, MD5 (Message Digest 5) and SHA (Secure
Hash Algorithm).
These three parameters are uniquely assembled in four choices on the Switch to create a three-layered
encryption code for secure communication between the server and the host. The user may implement
any one or combination of the ciphersuites available, yet different ciphersuites will affect the security
level and the performance of the secured connection. The information included in the ciphersuites is
not included with the Switch and requires downloading from a third source in a file form called a
certificate. This function of the Switch cannot be executed without the presence and implementation
of the certificate file and can be downloaded to the Switch by utilizing a TFTP server. The Switch
supports SSLv3 and TLSv1. Other versions of SSL may not be compatible with this Switch and may
cause problems upon authentication and transfer of messages from client to host.

Download Certificate

This window is used to download a certificate file for the SSL function on the Switch from a TFTP
server. The certificate file is a data record used for authenticating devices on the network. It contains
information on the owner, keys for authentication and digital signatures. Both the server and the client
must have consistent certificate files for optimal use of the SSL function. The Switch only supports
certificate files with .der file extensions. The Switch is shipped with a certificate pre-loaded though the
user may need to download more, depending on user circumstances.

Ciphersuite

This window will allow the user to enable SSL on the Switch and implement any one or combination
of listed ciphersuites on the Switch. A ciphersuite is a security string that determines the exact
cryptographic parameters, specific encryption algorithms and key sizes to be used for an
authentication session. The Switch possesses four possible ciphersuites for the SSL function, which
are all enabled by default. To utilize a particular ciphersuite, disable the unwanted ciphersuites,
leaving the desired one for authentication.
When the SSL function has been enabled, the web will become disabled. To manage the Switch
through the web based management while utilizing the SSL function, the web browser must support
SSL encryption and the header of the URL must begin with https://. (Ex. https://10.90.90.90) Any
other method will result in an error and no access can be authorized for the web-based management.
To view the windows for Download Certificate and Ciphersuite, click Security > SSL:
xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
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