ProxyLib / Proxy Verification Methodology

Proxy Server Verification Methodology

This document describes the proxy evaluation and verification system used by ProxyLib. We disclose all testing parameters in detail so users understand how we ensure proxy quality. The described methodology helps select optimal servers for various tasks: from web scraping to secure browsing.

1. Verification System

Automated testing every 2 hours through distributed servers in 10 countries.

Evaluation Parameters:

Parameter Verification Method Quality Criteria
IP:Port Format validation Correct combination
Proxy Type Sequential protocol testing:
HTTP → HTTPS → SOCKS4 → SOCKS5		 Support for ≥2 protocols
Anonymity Levels:
– Elite: no headers/leaks
– Anonymous: headers present but IP hidden
– Transparent: real IP visible		 Elite (no leaks)
Anonymous (partial)
Transparent (low)
Geolocation Comparison with MaxMind GeoIP2
City detection via WHOIS and TTL		 ≤20 km margin of error
Speed Average response time (3 attempts):
– TCP Handshake
– HTTP GET request		 ≤800 ms — excellent
≥1500 ms — excluded
Uptime Availability monitoring (7 days) ≥90% — stable

2. Technical Implementation

2.1 Verification Frequency:

Each proxy is tested every 2 hours

2.2 Anonymity Levels:

  • Elite: Complete anonymity (no X-Forwarded-For, Via, Client-IP headers)
  • Anonymous: Client IP hidden but proxy headers present
  • Transparent: Real client IP visible

3. Accuracy Guarantees

  • Manual recheck: 5% of random proxies daily
  • Geo-data calibration: Comparison with 3 independent databases (MaxMind, IP2Location, DB-IP)
  • False-positive filter: Exclusion of CDN and VPN servers

4. Competitive Advantages

Parameter ProxyLib Other Services
Test Depth 8 parameters 3-5 basic parameters
Frequency Every 2 hours Every 1-6 hours
Geo-Accuracy City-level detection Country only
Multi-Protocol Yes (4 types) No (HTTP/SOCKS only)
Anonymity 3-tier classification Binary (yes/no)

Created:  May 19, 2025
Last Updated: May 19, 2025

Author:  Bulatov Roman