Guide

How websites detect proxies: the detection stack from the defender's seat, ASN and IP reputation, TLS and HTTP/2 fingerprints, headers, behavior, and leaks.

The proxy server is refusing connections in Firefox or Tor? Here is what the error means and how to fix every cause, from a dead proxy to the wrong protocol.

SwitchyOmega setup for Chrome, Edge, and Firefox: install ZeroOmega, add an HTTP or SOCKS5 proxy, switch from the toolbar, and route sites with auto switch.

reCAPTCHA interrupts your scraping when your IP reputation or behavior looks automated. Here is what triggers the challenge and how to see it far less often.

A 504 Gateway Timeout through a proxy has a handful of specific causes. Here's how to diagnose which one you have and fix it, with copy-paste checks.

Chrome has no built-in proxy panel. The four ways to route Chrome through a proxy: system settings, an extension, command-line flags, or a separate profile.

Every way to route curl through a proxy: -x syntax, SOCKS5 vs socks5h, proxy auth, env vars, timing flags, plus scripts to test whole proxy lists in parallel.

How to choose and use proxies for web scraping: proxy types ranked by job, rotation strategy, avoiding blocks, request hygiene, and code you can run today.