Инструкция для ZYXEL GS1920-48

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Chapter 38 Access Control

GS1920 Series User’s Guide

313

Security Level

Select whether you want to implement authentication and/or encryption for SNMP
communication from this user. Choose:

•

noauth -to use the username as the password string to send to the SNMP manager.

This is equivalent to the Get, Set and Trap Community in SNMP v2c. This is the lowest

security level.

•

auth - to implement an authentication algorithm for SNMP messages sent by this user.

•

priv - to implement authentication and encryption for SNMP messages sent by this

user. This is the highest security level.

Note: The settings on the SNMP manager must be set at the same security level or higher

than the security level settings on the Switch.

Authentication

Select an authentication algorithm. MD5 (Message Digest 5) and SHA (Secure Hash
Algorithm) are hash algorithms used to authenticate SNMP data. SHA authentication is
generally considered stronger than MD5, but is slower.

Password

Enter the password of up to 32 ASCII characters for SNMP user authentication.

Privacy

Specify the encryption method for SNMP communication from this user. You can choose
one of the following:

•

DES - Data Encryption Standard is a widely used (but breakable) method of data

encryption. It applies a 56-bit key to each 64-bit block of data.

•

AES - Advanced Encryption Standard is another method for data encryption that also

uses a secret key. AES applies a 128-bit key to 128-bit blocks of data.

Password

Enter the password of up to 32 ASCII characters for encrypting SNMP packets.

Group

SNMP v3 adopts the concept of View-based Access Control Model (VACM) group. SNMP
managers in one group are assigned common access rights to MIBs. Specify in which
SNMP group this user is.

admin - Members of this group can perform all types of system configuration, including
the management of administrator accounts.

readwrite - Members of this group have read and write rights, meaning that the user can
create and edit the MIBs on the Switch, except the user account and AAA configuration.

readonly - Members of this group have read rights only, meaning the user can collect
information from the Switch.

Add

Click this to create a new entry or to update an existing one.

This saves your changes 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 reset the fields to your previous configuration.

Clear

Click Clear to reset the fields to the factory defaults.

Index

This is a read-only number identifying a login account on the Switch. Click on an index
number to view more details and edit an existing account.

Username

This field displays the username of a login account on the Switch.

Security Level

This field displays whether you want to implement authentication and/or encryption for
SNMP communication with this user.

Authentication This field displays the authentication algorithm used for SNMP communication with this

user.