Interface fields

Elastic Stack Serverless

The interface fields are used to record ingress and egress interface information when reported by an observer (e.g. firewall, router, load balancer) in the context of the observer handling a network connection. In the case of a single observer interface (e.g. network sensor on a span port) only the observer.ingress information should be populated.

Interface field details

Field	Description	Level
interface.alias	Interface alias as reported by the system, typically used in firewall implementations for e.g. inside, outside, or dmz logical interface naming. type: keyword example: `outside`	extended
interface.id	Interface ID as reported by an observer (typically SNMP interface ID). type: keyword example: `10`	extended
interface.name	Interface name as reported by the system. type: keyword example: `eth0`	extended

Field reuse

The interface fields are expected to be nested at:

observer.egress.interface
observer.ingress.interface

Note also that the interface fields are not expected to be used directly at the root of the events.