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NXA-ENET24 - Software Management Guide
e. The switch compares the decrypted bytes to the original bytes it sent. If the two sets match, this
means that the client's private key corresponds to an authorized public key, and the client is
authenticated.
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 proceeding section (Command Usage).
Field Attributes
Configuring the Secure Shell - Web
Click Security, SSH, Host-Key Settings. Select the host-key type from the drop-down box, select the option to
save the host key from memory to flash (if required) prior to generating the key, and then click Generate.
1. To use SSH with only password authentication, the host public key must still be
given to the client, either during initial connection or manually entered into the
known host file. However, you do not need to configure the client’s keys.
2. The SSH server supports up to four client sessions. The maximum number of
client sessions includes both current Telnet sessions and SSH sessions.
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 (Version2): 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.
FIG. 57
Web - SSH Host-Key Settings