ZyXEL Communications XGS2220 Series, Руководство пользователя

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Chapter 66 Access Control
XGS2220 Series User’s Guide
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The following table describes the labels in this screen.
66.5 Technical Reference
This section provides technical background information on the topics discussed in this chapter.
66.5.1 SSH Overview
Unlike Telnet or FTP, which transmit data in clear text, SSH (Secure Shell) is a secure communication
protocol that combines authentication and data encryption to provide secure encrypted
communication between two hosts over an unsecured network.
Figure 329 SSH Communication Example
66.5.1.1 How SSH Works
The following table summarizes how a secure connection is established between two remote hosts.
Table 256 SECURITY > Access Control > Account Security
LABEL DESCRIPTION
Account Security
Password
Encryption Select this check box to encrypt all passwords configured on the Switch. This displays the
password as encrypted text, in a saved configuration file.
Otherwise, the passwords configured on the Switch are displayed in plain text.
Apply Click Apply to save your changes for Account Security to the Switch’s run-time memory. The
Switch loses these changes if it is turned off or loses power, so use the Save link on the top
navigation panel to save your changes to the non-volatile memory when you are done
configuring.
Cancel Click Cancel to begin configuring Account Security afresh.
Display
Display Select which specific information to display in plain text, in the saved configuration file.
• Authentication
• Authorization
• Server
User Select which user account information to display in plain text, in the saved configuration file.
• System
• SNMP
Apply Click Apply to save your changes for Display to the Switch’s run-time memory. The Switch loses
these changes if it is turned off or loses power, so use the Save link on the top navigation panel to
save your changes to the non-volatile memory when you are done configuring.
Cancel Click Cancel to begin configuring Display afresh.