Specifications

DGS-3048 Layer 2 Switch CLI Reference Manual
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SSL COMMANDS
Secure Sockets Layer or SSL is a security feature that will provide a secure communication path between a host
and client through the use of authentication, digital signatures and encryption. These security functions are
implemented through the use of a ciphersuite, which is a security string that determines the exact cryptographic
parameters, specific encryption algorithms and key sizes to be used for an authentication session and consists of
three levels:
1. Key Exchange: The first part of the cyphersuite string specifies the public key algorithm to be used. This
switch utilizes the Rivest Shamir Adleman (RSA) public key algorithm and the Digital Signature
Algorithm (DSA), specified here as the DHE_DSS Diffie-Hellman (DHE) public key algorithm. This is
the first authentication process between client and host as they “exchange keys” in looking for a match and
therefore authentication to be accepted to negotiate encryptions on the following level.
2. Encryption: The second part of the ciphersuite that includes the encryption used for encrypting the
messages sent between client and host. The Switch supports two types of cryptology algorithms:
 Stream Ciphers – There are two types of stream ciphers on the Switch, RC4 with 40-bit keys and RC4
with 128-bit keys. These keys are used to encrypt messages and need to be consistent between client and host
for optimal use.
 CBC Block Ciphers – CBC refers to Cipher Block Chaining, which means that a portion of the
previously encrypted block of encrypted text is used in the encryption of the current block. The Switch
supports the 3DES_EDE encryption code defined by the Data Encryption Standard (DES) to create the
encrypted text.
3. Hash Algorithm: This part of the ciphersuite allows the user to choose a message digest 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. This 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.
Command Parameters
enable ssl
disable ssl
show ssl {certificate}
show ssl cachetimeout
crypto certificate generate <number 1-2> generate {key-generate <length 512 - 2048>|
cn <common- name 1 - 64>| ou <organization-unit 1 - 64>|
or
<organization 1 - 64>| loc <location 1 - 64>| st <state 1 -
64>| cu <country 1-2>| duration <days 30-3650>