D-Link DFL-260E User Manual for DFL-260E - Page 62
Severity Filter and Message Exceptions, 2.2.7. SNMP Traps, Note: Syslog server configuration
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2.2.6. Severity Filter and Message Exceptions Chapter 2. Management and Maintenance 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. 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 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 62