Overview

Figure 1.  Example SNMP Page

The SNMP page (Fig. 1) allows you to enable and configure Simple Network Management Protocol (SNMP) service for your networks.

SNMP Settings

Figure 2.  SNMP Form with “Off” Selected

Use the SNMP form (Fig. 2) to manage SNMP settings.

Enable SNMP

Choose one of three options described below:  “Off,” “On,” and “Inherit.”

Enable SNMP:  Off

The SNMP service is disabled by default (Fig. 2).  To enable it, choose either the “On” or the “Inherit” option, then click the “Save” button.  To disable it again, choose the “Off” option, then click the “Save” button.

Enable SNMP:  On

Figure 3.  SNMP Form with “On” Selected

Choosing the “On” option (Fig. 3) enables the Remote Syslog feature and makes the following fields available:

SNMP v3

Figure 4.  SNMP v3 Fields

To enable SNMP Version 3 (SNMP v3), which is the latest and most secure version of SNMP, check the “Enable SNMP v3” checkbox.

If enabled, the following additional fields will be available:

v3 Username

Enter the username to send with secure SNMP requests.  There is a minimum requirement of eight characters.

v3 Authentication Password

Enter the related password to send with secure SNMP requests.  There is a minimum requirement of eight characters.

v3 Encryption Key (AES-128)

Enter an encryption key to be used for securing SNMP requests.  The encryption key must use the AES-128 encryption standard.  There is a minimum requirement of eight characters, however a valid key will have 32 characters.

SNMP v2c

Figure 5.  SNMP v2c Fields

To enable Community-Based SNMP Version 2 (SNMP v2c), check the “Enable SNMP v2c” checkbox.  Enabling SNMP v2c is NOT recommended because it is obsolete and may cause compatibility and security issues.

If enabled, the following additional fields will be available:

v2 Community

Enter the name of the v2 Community, which acts like username/password credentials attached to SNMP requests.  There is a minimum requirement of eight characters.

v2 Trap Host (Optional)

Enter the IP address of the v2 Trap Host, which is a server that handles notifications (traps).  Leave this empty to disable trap hosting.

v2 Trap Port (Optional)

Enter the port of the v2 Trap Host.

v2 Trap Community (Optional)

Enter the name of the v2 Trap Community, which acts like username/password credentials attached to SNMP traps.  There is a minimum requirement of eight characters. The v2 Community value will be used if this is left blank.

Enable SNMP:  Inherit

Figure 6.  SNMP Form with “Inherit” Selected

Choosing the “Inherit” option (Fig. 6) enables the SNMP service with default settings from the parent company.

Save Button

To save any changes to these settings, click the “Save SNMP” button.

Add Allowed Subnet

Figure 7.  Add Allowed Subnet Form

Use the Add Allowed Subnets form (Fig. 7) to create new allowed subnets.  Allowed subnets are parts of your network that are allowed to use the SNMP service.

IP/Network

Enter the IP address and network mask (in CIDR notation) of the subnet you would like to allow.

Comments (Optional)

Enter any comments to describe the allowed subnet.

Add Button

To create an allowed subnet with these settings, click the “Add Allowed Subnet” button.

View Allowed Subnets

Figure 8.  Allowed Subnets List

Use the Allowed Subnets list (Fig. 8) to view and manage existing allowed subnets.

Columns

• Subnet – IP address and network mask of the allowed subnet
• Comments – comments describing the allowed subnet
• [Delete] – delete button

Actions

Delete Allowed Subnet

To delete an allowed subnet, click its minus icon button.  This will open a confirmation panel asking you to confirm the deletion.  If you are certain you want to delete the allowed subnet, click the “OK” button.