Specifications

SNMP Configuration Summary
About SNMP Security Models and Levels
SecureStack B2 Configuration Guide 4-3
4.1.3 About SNMP Security Models and Levels
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 are: No authentication required (NoAuthNoPriv); authentication
required (AuthNoPriv); and privacy (authPriv). A combination of a security model and a security
level determines which security mechanism is employed when handling an SNMP frame. Table 4-1
identifies the levels of SNMP security available on SecureStack B2 devices and authentication
required within each model.
Table 4-1 SNMP Security 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 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.