D-Link xStack DES-3528 Series - Ssh; SSH Settings

xStack® DES-3528/DES-3552 Series Layer 2 Managed Stackable Fast Ethernet Switch Web UI Reference Guide
275
SSH
SSH is an abbreviation of Secure Shell, which is a program allowing secure remote login and secure network
services over an insecure network. It allows a secure login to remote host computers, a safe method of executing
commands on a remote end node, and will provide secure encrypted and authenticated communication between
two non-trusted hosts. SSH, with its array of unmatched security features is an essential tool in today’s networking
environment. It is a powerful guardian against numerous existing security hazards that now threaten network
communications.
The steps required to use the SSH protocol for secure communication between a remote PC (the SSH client) and
the Switch (the SSH server) are as follows:
1. Create a user account with admin-level access using the User Accounts window. This is identical to
creating any other admin-level User Account on the Switch, including specifying a password. This
password is used to logon to the Switch, once a secure communication path has been established using
the SSH protocol.
2. Configure the User Account to use a specified authorization method to identify users that are allowed to
establish SSH connections with the Switch using the SSH User Authentication Mode window. There are
three choices as to the method SSH will use to authorize the user, which are Host Based, Password, and
Public Key.
3. Configure the encryption algorithm that SSH will use to encrypt and decrypt messages sent between the
SSH client and the SSH server, using the SSH Authentication Method and Algorithm Settings window.
4. Finally, enable SSH on the Switch using the SSH Configuration window.
After completing the preceding steps, a SSH Client on a remote PC can be configured to manage the Switch using
a secure, in band connection.
SSH Settings
Users can configure and view settings for the SSH server.
To view this window, click Security > SSH > SSH Settings, as shown below:
Figure 8-69 SSH Settings window
The fields that can be configured are described below:
Parameter Description
SSH Server State
Use the radio buttons to enable or disable SSH on the Switch. The default is Disabled.
Max Session (1-8) Enter a value between 1 and 8 to set the number of users that may simultaneously
access the Switch. The default setting is 8.
Connection Timeout
(30-600)
Allows the user to set the connection timeout. The user may set a time between 30 and
600 seconds. The default setting is 120 seconds.