Proxy guides and news

How to Fix CERTIFICATE_VERIFY_FAILED When Using HTTPS Through a Proxy

Learn what causes CERTIFICATE_VERIFY_FAILED errors when accessing HTTPS through a proxy and how to configure CA certificates correctly. This guide focuses on diagnosing certificate chains, trust stores, and application environments while keeping TLS verification enabled.

Proxy Knowledge

Proxy Location Mismatch: Why Is the Country Still Wrong After Changing Your IP?

Changing your proxy IP does not mean a website will update your country immediately. Learn the differences between proxy IP geolocation, location cookies, and browser location permissions to identify the actual cause and address it appropriately.

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How to Handle Proxy Passwords Containing Special Characters in Python Requests

Proxy usernames or passwords containing special characters can cause URLs to be parsed incorrectly and authentication to fail. This article explains proper percent encoding, Python Requests configuration, and troubleshooting without exposing credentials.

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Downloading Files Through a Proxy: Resuming with HTTP Range After a Connection Drop

Learn how to resume large file downloads through a proxy using HTTP Range, check server responses, and validate files to avoid downloading them again or combining data incorrectly.

Proxy Knowledge

Do Proxies Support HTTP/3? How to Check QUIC and HTTP/2 Fallback

Not every proxy can forward QUIC traffic to enable HTTP/3. This article explains how to check the protocol actually being used and confirm whether the browser switches to HTTP/2 when connecting through a proxy.

Proxy Knowledge

Can IPv6 Proxies Access IPv4 Websites? How to Check Before Buying

IPv6 proxies can access IPv4-only websites if the provider's infrastructure offers IPv4 outbound connectivity or a suitable translation mechanism. Learn how to distinguish connection addresses from outbound addresses and check proxy compatibility before buying.

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Setting Up a Mobile Proxy on Android: Checking Your IP and Troubleshooting

Learn how to set up a mobile proxy on Android, check your exit IP address, and identify the causes of proxy connection errors. This article also explains the limitations of Wi-Fi proxy settings and key considerations when using mobile data.

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Monitoring HTTP Proxies with Prometheus Blackbox Exporter and Alertmanager

A guide to monitoring HTTP proxies along the actual connection path, measuring latency with Prometheus Blackbox Exporter, and sending alerts through Alertmanager. This article explains how to configure probes, interpret metrics, and reduce false alerts.

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Testing wss:// WebSocket Proxies with Node.js and Troubleshooting Errors

Learn how to test whether a proxy supports secure WebSocket connections using Node.js, verify that connections actually pass through the proxy, and classify errors by stage. Includes test code for HTTP and SOCKS proxies and a troubleshooting workflow for real-time applications.

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GitHub Actions Proxy: Store Secrets and Configure CI/CD Securely

Learn how to store proxy credentials in GitHub Actions Secrets, restrict access, and use them securely in CI/CD workflows. Discover how to reduce password leaks through logs, temporary configuration files, and untrusted code.

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Configuring NO_PROXY Correctly for Localhost and Internal APIs

Learn how to configure NO_PROXY so applications access the Internet through a proxy while connecting directly to localhost and internal APIs. Explore environment variable settings, differences between HTTP libraries, and a configuration verification workflow.

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How to Update Your Proxy IP Whitelist When Your Home or Office IP Changes

A change in your network's IP address can cause an IP-authenticated proxy to reject connections even if the previous configuration worked. Learn how to identify your outbound IP, update your proxy whitelist, and safely test the connection.