Software Secure Firewall Threat Defense
Platform Secure Firewall Threat Defense Virtual
Activity Onboard

Interfaces and Device Settings Platform Settings Syslog Syslog Message Filtering

Last updated: Jul 29, 2025

Syslog Message Filtering

You can filter generated syslog messages so that only certain syslog messages are sent to a particular output destination. For example, you could configure the Firewall Threat Defense device to send all syslog messages to one output destination and to send a subset of those syslog messages to a different output destination.

Specifically, you can direct syslog messages to an output destination according to the following criteria:

  • Syslog message ID number

  • Syslog message severity level

  • Syslog message class (equivalent to a functional area)

You customize these criteria by creating a message list that you can specify when you set the output destination. Alternatively, you can configure the Firewall Threat Defense device to send a particular message class to each type of output destination independently of the message list.