Accton Technology ES3528M-SFP manual Generating the Host Key Pair

User Authentication 3

CLI – This example enables SSH, sets the authentication parameters, and displays the current configuration. It shows that the administrator has made a connection via SHH, and then disables this connection.

Console(config)#ip ssh server	4-48
Console(config)#ip ssh timeout 100	4-49
Console(config)#ip ssh authentication-retries 5	4-49
Console(config)#ip ssh server-key size 512	4-50
Console(config)#end
Console#show ip ssh	4-52

SSH Enabled - version 2.0				secs; Authentication retries: 5
Negotiation timeout:			120
Server key size: 512			bits
Console#show ssh						4-53
Connection Version State					Username Encryption
0	2.0	Session-Started			admin	ctos aes128-cbc-hmac-md5
Console#disconnect		0				stoc aes128-cbc-hmac-md5
						4-20
Console#

Generating the Host Key Pair

A host public/private key pair is used to provide secure communications between an SSH client and the switch. After generating this key pair, you must provide the host public key to SSH clients and import the client’s public key to the switch as described in the section “Importing User Public Keys” on page 3-76.

Field Attributes

•Public-Key of Host-Key– The public key for the host.

-RSA (Version 1): The first field indicates the size of the host key (e.g., 1024), the second field is the encoded public exponent (e.g., 65537), and the last string is the encoded modulus.

-DSA (Version 2): The first field indicates that the encryption method used by SSH is based on the Digital Signature Standard (DSS). The last string is the encoded modulus.

•Host-Key Type – The key type used to generate the host key pair (i.e., public and private keys). (Range: RSA (Version 1), DSA (Version 2), Both; Default: RSA) The SSH server uses RSA or DSA for key exchange when the client first establishes a connection with the switch, and then negotiates with the client to select either DES (56-bit) or 3DES (168-bit) for data encryption.

•Save Host-Key from Memory to Flash – Saves the host key from RAM (i.e., volatile memory) to flash memory. Otherwise, the host key pair is stored to RAM by default. Note that you must select this item prior to generating the host-key pair.

•Generate – This button is used to generate the host key pair. Note that you must first generate the host key pair before you can enable the SSH server on the SSH Server Settings page.

•Clear – This button clears the host key from both volatile memory (RAM) and non-volatile memory (Flash).

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