:4840
(TCP)
OPC UA
High 风险TCP — Other
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端口概览
端口号
4840
服务名称
OPC UA
传输协议
TCP
类别
Other
安全风险
High
端口范围
已注册 (1024-49151)
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.
TCP
Other
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。