:481
(TCP/UDP)
Low 风险
PH
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://ipfyi.com/iframe/entity//" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://ipfyi.com/entity//Add a dynamic SVG badge to your README or docs.
[](https://ipfyi.com/entity//)Use the native HTML custom element.
TCP/UDP — Other
端口概览
端口号
481
服务名称
PH
传输协议
TCP/UDP
类别
Other
安全风险
Low
端口范围
知名端口 (0-1023)
什么是端口 481?
PH (Phone Book) Service. CCSO Nameserver/PH directory service for looking up people and contact information, commonly used at universities.
TCP/UDP
Other
安全注意事项
端口481（PH）被归类为低风险。该服务使用加密或攻击面极小，相对安全可以暴露。
建议：应用标准安全实践。保持软件更新并监控访问。