How to detect all incoming or outgoing connections to SCADA networks

This simple how to explain how to detect all incoming or outgoing connections to SCADA networks:
1. Perform a thorough risk analysis to assess the risk and necessity of each connection to the SCADA network.

2. Develop a comprehensive understanding of all connections to the SCADA network, and how well these connections
are protected.

3. Identify and evaluate the following types of connections:
• Internal local area and wide area networks, including business networks
• The Internet
• Wireless network devices, including satellite uplinks
• Modem or dial-up connections
• Connections to business partners, vendors or regulatory agencies