DNP3_Data.Link.Layer.Function.NACK

Description

This indicates detection of the DNP3 Data Link Layer Function NACK.
DNP3 (Distributed Network Protocol) is a set of communication protocols used between components in process automation systems. It is used primarily in utilities like electric or water companies. The communication is done between a master station and Remote Terminal Units (RTUs) or Intelligent Electronic Devices (IEDs). The signature detects the service function in the DNP3 data link layer.

Affected Products

DNP3

Impact

Unexpected network communication

Technology

Browser-Based, Network-Protocol, Client-Server, Peer-to-Peer, Cloud-Based, Mobile-Device

Behavior

• Reasonable

Default Ports

• TCP/20000