How to Test Proxies: A Practical Guide to Checking Speed, Anonymity, and Reliability

Buying a proxy list and finding a huge percentage of them blacklisted is a hassle. Server providers will always oversell their services, and the proxy market is no different. This is why it is essential to test the proxy lists yourself, especially for important tasks like web scraping, advertisement verification, SEO, or social media management. Testing the proxy lists is at the same level of importance as test driving a car before buying it.

This guide will give an overview of the proxy market, and list the most valuable metrics an end user should understand. It will also present some metrics and practical guides that will aid in the reduction of technical issues in the subsequent use of the list.Along the way, we will reference tools and resources – including infrastructure from providers like Proxys.io – so you can put these techniques into practice right away.

Why is Testing Proxies Important?

Thousands of companies offer proxies, and the disparity in quality is extreme. Some offer fast, completely anonymous, and reliable proxies for months; others are selling recycled IP addresses that are already flagged on the major sites, with random and inconsistent speeds, and expose your real IPs via DNS or WebRTC leaks.

There are many extreme concerns, and without performing the minimal tests, there is no way to tell if a proxy actually conceals your IP, performs similar speeds to the provider’s claims, if the IP is already blacklisted, or if the server is in the geo-location that the provider claims. By skipping these tests, you’re risking your money, your accounts, and your time.

Latency and Connection Speed

When running a proxy, latency is the time it takes for a request to travel to the proxy server and back, and to your computer. Latency above 300 ms is simply not usable for scraping on a large scale, or performing real time tasks. Most of the time it is workable for most automation tasks. Anything above 300 ms is simply not usable. By using a speed test, you can determine which servers are overloaded.

Detecting IP Leaks

If a proxy allows your real IP address to be exposed via WebRTC, DNS requests, or HTTP headers, it defeats its own purpose. You can use ipleak.net, browserleaks.com, and dnsleaktest.com to check whether your real IP is exposed. If it is, you should discard that proxy. When it comes to security, there is no room for compromise. For more information on securing your digital self, check out the related best practices on the MotoCMS article on how to secure your website from hackers.

Anonymity Levels

Anonymity in proxy servers can be put under three categories: transparent, anonymous, and elite proxy servers. A transparent proxy is the least protective type of proxy, and is the most harmful for protective anonymity. An anonymous proxy server hides your real IP address, while still giving away the fact that a proxy is in use to the server you are connecting to. Elite or high-anonymous proxies are the most protective proxies and hide your real IP address and the proxy is not in use. Elite proxies are the most acceptable choice for elite workflows: scraping, account management, automation.

Geolocation Accuracy

If your work needs to access content from a certain country, geolocation accuracy is extremely important. For SEO monitoring, ad verification, and localized testing, the proxy IP must be geolocation accurate “advertisement” region. For checking geolocation accuracy use ip-api.com, MaxMind GeoIP, and ipinfo.io.

Effective Proxy Testing Procedures

The best results come from using a combination of a brief manual approach paired with some form of automated checks. Below is information on how both work in real life scenarios.

Manual Testing

The manual check takes less than a minute and gives you a quick snapshot. Set up the proxy in your browser or one in your terminal. Then visit a verification service like whoer.net or try checking with myip.com. The website will display the listed IP address along with an anonymization rating and the country listed in the proxy provider pool. If everything matches with what the provider gives, you are just getting started.

Automated Testing

When you need to test proxies in bulk – say, dozens or hundreds at a time – manual checks are not realistic. Automated testing workflows typically include a speed check using a proxy checker tool, a leak test through ipleak.net or dnsleaktest.com, an anonymity scan on whoer.net, geolocation confirmation via ip-api.com, and a target-site test to see whether the IP is already blocked. Many professionals script these checks and run them on a schedule to keep their proxy pools clean. If you are working with data collection at scale, the MotoCMS article on the latest trends in data scraping tools offers useful context on how automation fits into the bigger picture.

Selecting a Reliable Proxy Provider

Your results from testing will be impacted by the quality of the infrastructure you’re testing against. Beginning with the unreliable and poorly serviced will affect data quality and effort. Proxys.io is able to provide a patented proxy network and optimized proxy documentation for various workloads, including browser-based guides like the ProxyControl extension tutorial. This kind of documentation makes initial integration much smoother and lets you start testing in a real environment right away.

Comparison of Proxy Types

Different proxy types serve different purposes. Picking the right category is often just as important as testing the proxy itself.

Signs of a Poor Proxy

Proxy servers can even get worse over time even when they  successfully pass initial testing. Some warning signs include: inconsistencies in response times across multiple requests; HTTP 403 (proxy authentication required) and other HTTP 407 errors; geolocation results that don’t match provider claims; poor or frequent timeouts; and mismatches of SSL certificates in HTTPS. A big warning sign can be a certificate mismatch. This can mean that a third party is potentially spying on your data.

For any business that operates online, proxies that work are a necessity. The MotoCMS proxy guide provides a good outline of the security mindset that you should use when you are using a third party proxy service.

Testing Proxies Regularly

Proxy testing is ongoing. It needs to be a system that continues over time and creating blocking systems on different kinds of devices and on different types of proxies (i.e. website, data, or cloud proxies) is important, as in the long term, this is the benchmark of your system’s usability. This will keep your site and proxy system running. The MotoCMS article on proxy systems provides good tips and advice on what is important in your business. In motivational literature on this subject, there is a basic framework that is backed by strategies on proxy websites.

A note on ethics: Proxies can / and will be abused / used unethically and are very powerful tools. You must respect the other end of the requests that the proxies are sending the requests to. Just because the data may be publicly available doesn’t mean there are no boundaries to managing the bulk accounts on the different platforms. The MotoCMS blog on ethical web scraping is worth the read if you are interested in the collection of web data and the ethics behind it.

Final thoughts

The most simple way to keep from wasting time and not prolonging the projects is to double / triple test the proxies before putting them to work. It doesn’t need to be complicated – a manual test and an automated test to check the basics is all you need to do. A regular habit will keep the projects running smoother and will keep accounts from being banned. Set your proxies on automation running to clear loading and response time and keep your testing routine set. Automation proxies will help keep the fires from needing to be put out.