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How Proxy Checkers Validate Connections
An online proxy checker tests if a remote proxy server is alive, checks latency response times, and determines its anonymity level. By executing connection handshakes over SOCKS4, SOCKS5, HTTP, or HTTPS protocols, the diagnostic tool checks for timeout values and server error codes.
Understanding Proxy Anonymity Levels
Proxies fall into three distinct classification profiles based on the HTTP headers they send:
- Elite (L1) / High Anonymity: Fully conceals your real IP. The destination web host cannot detect that a proxy is being used.
- Anonymous (L2): Conceals your real IP, but sends headers indicating that a proxy server is in place.
- Transparent (L3): Fails to hide your identity. Appends headers (like X-Forwarded-For) containing your real local IP address.
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