Severity Filter And Message Exceptions; Snmp Traps - D-Link DFL-1660 User Manual

2.2.6. Severity Filter and Message
Exceptions

2.2.6. Severity Filter and Message Exceptions

For each log receiver it is possible to impose rules on what log message categories and severities are
sent to that receiver. It is also possible to lower or raise the severity of specific events.
The Severity Filter
The Severity Filter is a means of specifying what severities, if any, are sent to the receiver. By
default, all log messages except Debug are sent. This can be restricted further so, for example, only
Emergency, Alert and Critical messages are sent.
Log Message Exceptions
After the severity filter is applied, any Log Message Exceptions are applied to generated messages.
There can be more than one message exception for a log receiver and each consists of the following:
• Category and ID
This specifies the log messages that will be affected by the exception. If the ID number of the
log message is not specified then all log messages for the specified category will be included.
The ID of specific log messages can be found in the Log Reference Guide.
• Type
This can be one the following:
i. Exclude - This will exclude the specified log message(s) even if they are allowed by the
severity filter.
ii. Include - This will include the specified log message(s) even if they are excluded by the
severity filter.
In addition, the Severity of the included message(s) can be specified. If this is set to
Default the original severity is used. Otherwise, the severity is set to the specified value.
This provides the ability to raise (or lower) the severity of specific log messages.

2.2.7. SNMP Traps

The SNMP protocol
Simple Network Management Protocol (SNMP) is a means for communicating between a Network
Management System (NMS) and a managed device. SNMP defines 3 types of messages: a Read
command for an NMS to examine a managed device, a Write command to alter the state of a
managed device and a Trap which is used by managed devices to send messages asynchronously to
an NMS about a change of state.
SNMP Traps in NetDefendOS
Note: Syslog server configuration
The syslog server may have to be configured to receive log messages from
NetDefendOS. Please see the documentation for specific Syslog servers in order to
correctly configure it.
Chapter 2. Management and Maintenance
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