The OPC-UA (OPC Unified Architecture) standard is a protocol that is widely used in industry for the simple and secure exchange of information between platforms and industrial equipment. The protocol is based on a client-server communication where the server component is used on various systems (cross-platform)
 
https://opcfoundation.org/
 

• This funcionality must be supported for the Zabbix Proxy (as OPC-UA Client)
• Zabbix must be subscribe the data/nodes from the OPC-UA servers
• The communication is TCP/IP based like Endpoint URL e.g. opc.tcp://192.168.1.2:4840
• Supports OPC-UA authentication
  •     Security Mode (None, Sign, Sign and encrypt)
  •     Security Policy (Basics128RSA15, Basic256, Basic256SHA256)
  •     User Idendity
    •         Anonymous
    •         User / Password
  •     Replace discovered hostnames
  •     Endpoint Discovery
• The item keys for the OPC-UA server monitoring should contain:
• •     Server - Server Status Currentime
  •     Server State
  •     Server Diagnostic
  •     Current SubscriptionCount
  •     RejectedRequestedCounts
  •     RejectedSessionCount
  •     DiscoveredNamesSpace