Ssl Commands - Extreme Networks EAS 100-24t Switch CLI Manual

Chapter 9: Security
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:
a 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.
b 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. You 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.
The SSL commands in the CLI are listed (along with the appropriate parameters) in the following table:
Command
enable ssl
disable ssl
config ssl cachetimeout
show ssl
show ssl cachetimeout
download ssl certificate
Each command is listed, in detail, in the following sections.
enable ssl
Purpose
Syntax
298
Parameters
{ciphersuite {RSA_with_RC4_128_MD5 | RSA_with_3DES_EDE_CBC_SHA |
DHE_DSS_with_3DES_EDE_CBC_SHA |
RSA_EXPORT_with_RC4_40_MD5}}
{ciphersuite {RSA_with_RC4_128_MD5 | RSA_with_3DES_EDE_CBC_SHA |
DHE_DSS_with_3DES_EDE_CBC_SHA |
RSA_EXPORT_with_RC4_40_MD5}}
<value 60-86400>
{certificate}
<ipaddr> certfilename <path_filename 64> keyfilename <path_filename 64>
To enable the SSL function on the switch.
enable ssl {ciphersuite {RSA_with_RC4_128_MD5 |
RSA_with_3DES_EDE_CBC_SHA | DHE_DSS_with_3DES_EDE_CBC_SHA
| RSA_EXPORT_with_RC4_40_MD5}}
Extreme Networks EAS 100-24t Switch CLI Manual