How sites spot a proxy
Anti-fraud checks the IP against what the browser reports: time zone, language, the address WebRTC returns. Then it builds a fingerprint from your screen, GPU, fonts and canvas.
Say the proxy sits in France while the browser keeps Moscow time and leaks your home IP through WebRTC. The site ties the account to you. This check shows such mismatches before the platform sees them.
Every check runs in your browser. RIPEstat supplies the country and provider, and the browser learns its WebRTC address from Google's STUN server.
When you need it
- You bought proxies and want to be sure the browser does not leak your real address.
- You set up a profile in an antidetect browser and match time zone, language and WebRTC to the IP.
- A platform keeps asking for verification or bans accounts, and you need to find what gives you away.
- You run several accounts and test each profile before signing in.