Step 7 - SNMP communities

Define SNMP communities used within your organisation

Overview

If you configure SNMP for a device, Megamon uses SNMP to retrieve system information. You can define additional SNMP communities in the initial setup during the installation process or at any time by navigating to Settings → SNMP Communities. Megamon only requires read access to the data on your devices but does not distinguish between readonly and readwrite access.

Recommendation: Define all SNMP communities that you want to use before you use Megamon to collect the maximum amount of data and get the most out of your Megamon instance. 

Add a new SNMP community

To add a new SNMP community, navigate to SettingsSNMP Communities then select Add SNMP Communities.

You can specify version 1, 2c, and 3 SNMP communities. Which version of SNMP that you use depends on the security that your business requires. While version 3 offers the highest level of security, it requires a high amount of configuration and is recommended only for advanced users and users who poll devices directly over the Internet.

SNMP community versions and their authentication and encryption methods.
Model Level Authentication Encryption What Happens

v1

noAuthNoPriv

Community String

No

Uses a community string match for authentication.

v2c

noAuthNoPriv

Community String

No

Uses a community string match for authentication.

v3

noAuthNoPriv

Username

No

Uses a username match for authentication.

v3

authNoPriv

MD5 or SHA

No

Provides authentication based on the HMAC-MD5 or HMAC-SHA algorithms.

v3

authPriv

MD5 or SHA

DES

Provides authentication based on the HMAC-MD5 or HMAC-SHA algorithms. Provides DES 56-bit encryption in addition to authentication based on the CBC-DES (DES-56) standard.