客户端 IP 是分配给访问互联网或网络的设备的唯一地址。此 IP 标识客户端的位置和连接。在使用代理服务器时，客户端 IP 通常会被屏蔽以维护隐私和匿名性。
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用例
Fraud Detection
Websites often track Client IPs to spot suspicious activity, such as multiple login attempts from different locations in a short period.
Rate Limiting
Servers may use the Client IP to limit the number of requests a single user can make, protecting resources from overload.
Geolocation Services
A Client IP can be mapped to a geographic region, helping businesses deliver localized content or comply with regional rules.
最佳实践
Respect Privacy
Mask or anonymize Client IPs when logging them to avoid exposing sensitive user details unnecessarily.
Handle Proxies Correctly
When dealing with proxies, check headers like X-Forwarded-For to correctly identify the original Client IP, if available.
Secure Your Logs
Always protect stored Client IP data with encryption and access controls, as it can be considered personal data under certain privacy laws.
结论
A Client IP is the address that identifies the origin of a request on the Internet. It is vital for communication, security, and traffic management, and proxies play a major role in shaping how Client IPs are seen by servers.
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经常问的问题
What is the difference between a Client IP and a Server IP?
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The Client IP belongs to the requester (your device or proxy), while the Server IP belongs to the machine that provides the content or service.
Can websites see my real Client IP if I use a proxy?
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No, if configured correctly. The proxy replaces your Client IP with one of its own, masking your identity.
Why is the Client IP important for proxies?
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It defines the relationship between user and proxy—every request must present a Client IP, making it the foundation for masking, rotation, and anonymity.
Is a Client IP personal data?
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In many jurisdictions, yes. Laws like GDPR treat Client IP addresses as personal data because they can be used to identify a user.
