:109
(TCP)
Medium 风险
POP2
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TCP — Email
端口概览
端口号
109
服务名称
POP2
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 109?
POP2 (Post Office Protocol version 2) is the predecessor to POP3, defined in RFC 937. It is completely obsolete; all modern email clients use POP3 (port 110) or IMAP (port 143).
TCP
Email
安全注意事项
端口109（POP2）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。