An SNMP security model is an authentication strategy that is set up for a user and the group in which the user resides. A security level is the permitted level of security within a security model. The three levels of SNMP security on Extreme Networks devices are:
A combination of a security model and a security level determines which security mechanism is employed when handling an SNMP frame. SNMP Security Models and Levels identifies the levels of SNMP security available on Extreme Networks devices and authentication required within each model.
SNMP Security Models and Levels
| Model | Security Level | Authentication | Encryption | How It Works |
|---|---|---|---|---|
| v1 | NoAuthNoPriv | Community string | None | Uses a community string match for authentication. |
| v2c | NoAuthNoPriv | Community string | None | Uses a community string match for authentication. |
| v3 / USM | NoAuthNoPriv | User name | None | Uses a user name match for authentication. |
| AuthNoPriv | MD5 or SHA | None | Provides authentication based on the HMAC-MD5 or HMAC-SHA algorithms. | |
| 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. |
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