OPC UA
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TCP — Other
端口概览
什么是端口 4840?
Port 4840 is the default port for OPC UA (OPC Unified Architecture), an industrial communication protocol used in manufacturing automation, SCADA systems, and Industrial IoT. OPC UA provides a platform-independent, secure, and reliable mechanism for data exchange between industrial devices and software. Exposure of this port in ICS/SCADA environments poses serious industrial control system security risks.
安全注意事项
端口4840（OPC UA）被归类为高风险。此端口是自动扫描和暴力破解攻击的常见目标。如必须暴露，请将访问限制为已知IP地址。
建议：使用防火墙规则将可信IP列入白名单。启用速率限制和入侵检测。