💻 Troubleshooting Common Proxy Errors
A proxy server can stop working for a variety of reasons — from incorrect authentication and misconfiguration to connection drops and access restrictions. Each failure type returns a specific status code that points to a different root cause and requires a different fix.
This guide breaks down the most common proxy errors (400, 401, 403, 407, 408, 429, 500, 502, 503, 504, Connection Refused, DNS Lookup Failed, and SSL Handshake Error), explains what triggers each one, and provides step-by-step instructions for diagnosing and resolving the issue.
Troubleshooting Common Proxy Errors
March 31, 2026 449
