Methods for identifying fake and dangerous proxies

You bought a proxy, but websites won’t load, and the speed has dropped threefold: the proxy market can be very tricky. Behind appealing descriptions, there are often servers that are not just useless but also dangerous. Some steal traffic, others can replace pages, and some intercept passwords. Sometimes someone else may be committing fraud under your IP, and you don’t even realize it until you try accessing a marketplace from that address.

What fake and dangerous proxies are

• Fake proxies are those that do not match their stated characteristics. You bought a German IP, but it shows up as Indian. They promised 100 Mbps — in reality, you get 5 with drops. Or the address doesn’t work at all from the start.
• Dangerous proxies are those that actively harm you. They store your traffic along with passwords and card numbers. They inject their own ads or fake login forms into pages. They use your connection to attack other websites. They sell your activity data to anyone.

A dangerous proxy may look like a normal working one. The speed seems fine, websites load. But in the background, things are happening that you are unaware of.

Why it is important to check proxy quality

This matters because the risks involved are serious.

You configure your tools for specific parameters but get something entirely different. Scripts fail, accounts cannot be created, data is collected with errors. If a proxy intercepts traffic, an attacker gains access to your accounts. It becomes especially unpleasant when you lose an advertising account with thousands in budget this way.

Signs of unreliable proxies

• Unstable performance. The proxy works for an hour and then disconnects. A normal server maintains a stable connection without constant drops.
• Geolocation mismatch. Verification services show a country different from the one you purchased.
• Overloaded addresses. One proxy is used by dozens of people simultaneously. Speed drops, and websites start showing CAPTCHAs after every few clicks. It’s even worse when you are sold a “private” proxy that is actually shared.
• Low speed. They promise 100 Mbps, but you get 2–5. This means the server is either overloaded or underpowered.
• No support response. You report an issue, and two days later get: “everything works, check your settings.”
• Refusal to replace. A reliable provider will replace a non-working proxy within the first 24 hours without unnecessary questions.

Tools and methods for checking proxies

• Geolocation check. Use multiple services, and if at least two show a country different from the one declared by the seller — the proxy is fake.
• Testing speed and stability. Access a testing website through the proxy and measure speed. Or use automated checker services that send a series of test requests and generate a report: response time, success rate, stability.
• Security check. Make sure your real IP is not leaking via WebRTC (there are dedicated testing sites). Verify that connections to HTTPS websites are actually encrypted.
• Behavioral tests. Send 50–100 sequential requests to one website. A good proxy will handle this without a sharp drop in speed.

Recommendations for choosing proxies

• Look for reviews not only on the seller’s website (they are easy to fake), but also on independent forums. Observe how the provider responds to negative feedback — constructively or aggressively.
• Even a good proxy can degrade over time, get blacklisted, or simply stop working. Set up weekly checks for all addresses you use.
• If you use dozens or hundreds of proxies, integrate automatic validation into your scripts: before sending a request, check if the proxy is alive, and if not — remove it from the pool.

Belurk offers proxies that are tested before sale. The catalog includes IPv4 and IPv6, as well as HTTPS and SOCKS5 protocols. Technical support helps with setup and resolves issues. Additionally, Belurk provides a free proxy checking tool that can be used regardless of where you purchased your addresses.

Conclusion

Fake and dangerous proxies are a real threat to your projects. Stolen data, damaged IP reputation, loss of time and money. Always check proxies before building serious processes on them, and approach your choice responsibly: verify geolocation, test speed, assess IP reputation, and choose a provider that stands behind its product.