What is the difference between Transparent, Anonymous, and Elite proxies?

Transparent proxies reveal your real IP in X-Forwarded-For headers; Anonymous proxies hide your real IP but broadcast that a proxy is in use via Via headers; Elite (High Anonymity) proxies strip all proxy headers, making the connection indistinguishable from a regular direct residential user.

How do anti-bot systems like Cloudflare and Akamai detect proxy usage?

Anti-bot engines analyze TCP/IP fingerprinting (p0f), TLS JA3/JA4 fingerprinting, proxy headers (X-Forwarded-For, Via), WebRTC public IP discovery, and IP ASN classification (datacenter vs residential ISP).

What is a WebRTC leak and how does it bypass VPNs and proxies?

WebRTC uses STUN/TURN protocols to establish peer-to-peer browser connections, querying local and public network interfaces directly. If unpatched, browser JavaScript can execute STUN queries to expose your true underlying IP address even behind a proxy.

RFC 7239 Forwarded & Anonymity Audit Engine

Proxy & Header Anonymity Leak Tester

Test your incoming HTTP connection for Via proxy headers, X-Forwarded-For IP leaks, WebRTC exposure, and compute your real-time Stealth Anonymity Rating.

Transparent (Level 3 - Real IP Leaking)

75% Stealth Score

Critical warning: Your real client origin IP is exposed in request headers.

Tested Public IP 216.73.216.65 Global Routable IP

Anonymity Tier

Transparent (Level 3 - Real IP Leaking)

Based on RFC 7239 header compliance

Proxy Leak Status

1 IP Exposure Vectors

Monitored forwarding headers

Stealth Rating

75 / 100

Anti-bot firewall bypass probability

Proxy Leak Inspection Vectors

Audited headers known to disclose client real IP addresses to target web servers.

1 Leaks Detected

Origin IP Leakage (X-Forwarded-For) HTTP_X_FORWARDED_FOR

216.73.216.65

Anti-Detect & Web Scraping

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Proxy Architecture & Anonymity Standards

The 3 Tiers of Proxy Anonymity & Anti-Bot Detection

Not all proxies protect your privacy. Understand the technical differences between Transparent, Anonymous, and Elite proxy architectures, header forwarding standards (RFC 7239), and how anti-scraping firewalls detect proxies.

Level 3: Transparent

Zero Privacy Protection

Sends your real origin IP address in the X-Forwarded-For header and announces its proxy presence via the Via header. Used by corporate caches and public library content filters.

Easily blocked by all websites

Level 2: Anonymous

Hides Real IP, Flags Proxy

Hides your real IP address (omitting or anonymizing X-Forwarded-For), but transmits a Via header confirming that the connection originates from an intermediary proxy server.

Flags CAPTCHA challenges

Level 1: Elite (High Anonymity)

Complete Stealth Anonymity

Strips all proxy-related headers (Via, X-Forwarded-For, Forwarded). The destination web server sees only the proxy IP, completely indistinguishable from a regular direct home internet connection.

The gold standard for scraping

RFC 7239 Standards

HTTP Request Headers That Disclose Proxy Connections

Via

Informs the server of forward and reverse proxies in the path (e.g. 1.1 squid, 2.0 varnish). Immediate indicator of non-direct browsing.

X-Forwarded-For

De-facto standard header containing a comma-separated list of IP addresses representing the client origin and subsequent proxies.

Forwarded

Official IETF RFC 7239 standardized header replacing X-Forwarded-For with syntax: for=192.0.2.60;proto=http;by=203.0.113.43.

X-Real-IP

Common Nginx reverse proxy header transmitting the immediate single client IP address to backend application workers.

CF-Connecting-IP

Cloudflare edge header passing the visitor's original public IPv4/IPv6 address to the origin server behind the CDN.

True-Client-IP

Akamai and Cloudflare Enterprise header delivering the real client IP address for perimeter firewall whitelisting.

Anonymity Knowledge Base

Frequently Asked Questions: Proxy Stealth & IP Anonymity

Anti-detect browsers emulate unique hardware and software browser environments: they spoof Canvas, WebGL, AudioContext, Navigator language, and WebRTC STUN interfaces to match the geographic location and timezone of the proxy IP, preventing cross-correlation flags.

Datacenter IP blocks belong to hosting provider ASNs (e.g. Hetzner, DigitalOcean, AWS), which anti-bot security systems immediately identify using IP-to-ASN intelligence databases. Residential proxies originate from consumer ISPs (Comcast, AT&T, Spectrum), making them look like legitimate human home broadband users.