Network records identify and logically group a range of IP addresses to:
- Assign a Risk-Based Priority (RBP) to events.
- Determine direction such as inbound or outbound for the activity being logged.
Network records do not need to correspond to physical networks. Their function is to identify a contiguous range of IP addresses that share a common risk threshold. For direction identification, all undefined network ranges are considered to be external in nature; although for risk rating, networks may also be defined explicitly as external.
In LogRhythm, Known Networks are used:
- To help calculate Risk Based Priority (RBP) and Direction.
- As criteria for Alarm Rules.
MPE resolves the Network at run-time when it calculates RBP and direction. The Alarm and Response Manager (ARM) resolves the network at run time for rules evaluation.
Hosts and Networks are also assigned a Zone value of Internal, External, or DMZ. The Zone is assigned in the order:
- Zone of the resolved Known Host.
- Zone of the resolved Network.
- The IP address:
- If the IP Address is private, set the Zone to Internal.
- If the IP Address is public, set the Zone to External.
- If there is no IP Address, set the Zone to Unknown.