F-SECURE POLICY MANAGER 7.0 -, Administrator'S Manual

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A.4 Management Information Base
A Management Information Base (MIB) describes a set of managed
objects on an SNMP agent. A management system can manipulate the
objects if the SNMP agent has associated an extension agent DLL with
that MIB.
The SNMP MIB files are automatically installed under F-Secure Policy
Manager Console in the directory
Administrator \ snmp mib \ during the
F-Secure Policy Manager Console installation. Each product has its own
SNMP MIB file.
The entry for each managed object has a unique identifier (OID). The
entry also contains a description of the object's type (such as counter,
string, gauge, or address), the object's access type (such as read or read/
write), size restrictions, and range information.
An OID is a unique identifier assigned to a specific object. The identifier
consists of a sequence of numbers that identify the source of the object
as well as the object itself. OIDs are organized in a tree-like structure and
the sequence of numbers identifies the various branches of the subtree
that a given object comes from. The root of the tree is the ISO
(International Standards Organization) trunk. Its value is 1. Each branch
coming from the root further identifies the source of the given object. All
SNMP objects are members of the branch identified by
iso.org.dod.internet or 1.3.6.l . Each additional component in this dotted
notation further specifies the exact location of an object. The numbers for
each sub-branch are assigned by the IETF to ensure that all branches are
unique.
Traps are SNMP messages from an agent to a preconfigured
management station. They are used to notify management consoles of
significant events. Traps are typically used for reporting the starting and
stopping of a service, reporting serious error conditions, etc.
Traps are sent to the management station through the SNMP agent only if
forwarding is selected in the product’s redirection table in F-Secure Policy
Manager Console. For more information about trap redirection, see
“ Configuring Alert Forwarding”, 142 .