:691
(TCP)
Medium 风险
MS Exchange Routing
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TCP — Email
端口概览
端口号
691
服务名称
MS Exchange Routing
传输协议
TCP
类别
Email
安全风险
Medium
端口范围
知名端口 (0-1023)
什么是端口 691?
Microsoft Exchange Server Link State routing protocol, used internally by Exchange 2000/2003 servers for routing topology. Deprecated in Exchange 2007.
TCP
Email
安全注意事项
端口691（MS Exchange Routing）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。