vacmAccessTable

The table of access rights for groups.
          
Each entry is indexed by a groupName, a contextPrefix,
a securityModel and a securityLevel.  To determine
whether access is allowed, one entry from this table
needs to be selected and the proper viewName from that
entry must be used for access control checking.
          
To select the proper entry, follow these steps:
          
1) the set of possible matches is formed by the
   intersection of the following sets of entries:
          
     the set of entries with identical vacmGroupName
     the union of these two sets:
      - the set with identical vacmAccessContextPrefix
      - the set of entries with vacmAccessContextMatch
        value of 'prefix' and matching
        vacmAccessContextPrefix
     intersected with the union of these two sets:
      - the set of entries with identical
        vacmSecurityModel
      - the set of entries with vacmSecurityModel
        value of 'any'
     intersected with the set of entries with
     vacmAccessSecurityLevel value less than or equal
     to the requested securityLevel
          
2) if this set has only one member, we're done
   otherwise, it comes down to deciding how to weight
   the preferences between ContextPrefixes,
   SecurityModels, and SecurityLevels as follows:
   a) if the subset of entries with securityModel
      matching the securityModel in the message is
      not empty, then discard the rest.
   b) if the subset of entries with
      vacmAccessContextPrefix matching the contextName
      in the message is not empty,
      then discard the rest
   c) discard all entries with ContextPrefixes shorter
      than the longest one remaining in the set
   d) select the entry with the highest securityLevel
          
Please note that for securityLevel noAuthNoPriv, all
groups are really equivalent since the assumption that
the securityName has been authenticated does not hold.

MIB

SNMP-VIEW-BASED-ACM-MIB

OID

.1.3.6.1.6.3.16.1.4

Type

table

Status

current

Parent

vacmMIBObjects

Siblings

3

Children

1