Curl failed to connect to proxy. To solve the cURL (28) error, double-check your proxy IP and port or use another proxy, as it can be down or unresponsive. See full list on oxylabs. This guide will help you understand the common causes of this error and provide troubleshooting steps to resolve it. What’s Happening: Your curl command is pointing to a port where no service is actively listening for new connections. We’ll also look at how to use cURL for web scraping and avoid common errors. io Dec 11, 2024 · This response is sent with a Proxy-Authenticate header that contains information on how to correctly authenticate requests. Jan 30, 2025 · In this article, we’ll explain how cURL helps download files, send requests, and work with proxies to bypass blocks and protect your anonymity. The client may repeat the request with a new or replaced Proxy-Authorization header field. Simple examples and useful tips — all of that awaits you below! Mar 14, 2024 · This error arises when the cURL request can't connect to the proxy server, either because the server isn't responding or the proxy details are invalid. How to Check (on the server): You can use the netstat or the more modern ss command on the server to see which ports are being used. Sep 13, 2025 · If you try to connect to the wrong port, the server will refuse the connection. Oct 26, 2011 · Charles has to be running (and listening on port 8080) for curl to be able to use it as a proxy. Jun 25, 2024 · This error indicates that curl was unable to establish a connection to the specified host. That or you've got a firewall actively blocking that port, preventing anything from connecting. . laoxg zdtu imzqsu rhtyf tcmls xntcqjx rkp qgpiq prhd hcrjp