Security
4-6 7610-A2-GB20-10
November 1997
Controlling SNMP Access
There are three methods for limiting SNMP access.
Disable the SNMP management option.
Assign SNMP community names and access levels. The DSU supports
SNMP Version 1, which provides limited security through the use of
community names.
Limiting SNMP access through validation of the IP address of each allowed
SNMP manager.

Assigning SNMP Community Names and Access Levels

The DSU can be managed by an SNMP manager supporting the SNMP protocol.
The community name must be supplied by an external SNMP manager accessing
an object in the MIB.
To define SNMP community names, follow this menu selection sequence:
Main Menu
→
Configuration
→
Load Configuration From
→
Edit
→
SNMP & Communication
→
General SNMP Management
Refer to General SNMP Management Options, Table A-10, to:
Enable SNMP Management.
Assign the SNMP community names of the SNMP Managers that are allowed
to access the DSU’s Management Information Base (MIB).
Specify read or read-write access for each SNMP community name.

Limiting SNMP Access through the IP Addresses of the Managers

The DSU provides an additional level of security through validation of the
IP addresses.
The SNMP Management option must be enabled. To control SNMP access with
IP addresses, follow this menu selection sequence:
Main Menu
→
Configuration
→
Load Configuration From
→
Edit
→
SNMP & Communication
→
SNMP NMS Security Options
Refer to SNMP NMS Security Options, Table A-11. The SNMP access can be
limited by:
Enabling NMS IP address validation to perform validation checks on the
IP address of an SNMP management system attempting to access the DSU.
Specifying read or read-write access for each NMS authorized to access the
unit.