:81
(TCP)
Medium 风险
HTTP Alternate
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TCP — Web
端口概览
端口号
81
服务名称
HTTP Alternate
传输协议
TCP
类别
Web
安全风险
Medium
端口范围
知名端口 (0-1023)
什么是端口 81?
Port 81 is an unofficial alternate HTTP port used when port 80 is unavailable or blocked, commonly seen on home routers, development servers, and some commercial web appliances. Publicly exposed port 81 web services are frequently targeted by automated vulnerability scanners.
TCP
Web
常用
安全注意事项
端口81（HTTP Alternate）被归类为中等风险。虽然此服务通常会暴露，但请在可用时考虑使用加密替代方案。
建议：保持服务更新。监控日志以发现异常活动。