D-Link DES-3526DC Product Manual - Page 151
Secure Shell (SSH), SSH Configuration
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xStack DES-3500 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual Secure Shell (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 in the Security Management folder. 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 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 Algorithm 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 Configuration The following window is used to configure and view settings for the SSH server and can be opened by clicking Security Management > Secure Shell (SSH) > SSH Configuration: Figure 7- 24. Current SSH Configuration Settings To configure the SSH server on the Switch, modify the following parameters and click Apply: Parameter Description SSH Server Status Max Session (1-8) Time Out (120-600) Use the pull-down menu to enable or disable SSH on the Switch. The default is Disabled. Enter a value between 1 and 8 to set the number of users that may simultaneously access the Switch. The default setting is 8. Allows the user to set the connection timeout. The use may set a time between 120 and 600 seconds. The default setting is 300 seconds. 137