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Resolving "Timeout Connecting to Specified Port" & 429 Errors

Common Connection and Rate-Limit Errors

If you are seeing errors like "Timeout connecting to specified port", ERR_TUNNEL_CONNECTION_FAILED, Connection reset (error 56), or 429 Too Many Requests, this guide will help you resolve them.

Error: Timeout Connecting to Specified Port

This means your device attempted to reach the proxy server but did not receive a response within the allowed time.

Common causes:

  • Incorrect port number — Double-check the port on your dashboard. HTTP and SOCKS5 use different ports.
  • Firewall blocking outbound connections — Your local network, corporate firewall, or ISP may be blocking the proxy port. Try switching to port 443 if available.
  • Proxy server under maintenance — Check the ProxyPorts dashboard or status page for any ongoing maintenance windows.

Error: ERR_TUNNEL_CONNECTION_FAILED

This Chrome-specific error indicates the browser could not establish a tunnel through the proxy. Causes include wrong credentials, an expired proxy, or a network-level block.

Error: Connection Reset (56)

This typically means the connection was established but then dropped. This can happen when the proxy server forcibly closes the connection due to rate limiting or session conflicts.

Error: 429 Too Many Requests

You are sending too many connection requests in a short period. This is a rate-limiting response. Back off and reduce your request frequency.

Step-by-Step Troubleshooting

  1. Clear all saved proxy settings — Remove any cached proxy configurations in your browser, extension, or application. Old settings can conflict with current credentials.
  2. Restart your router — This clears any stuck NAT sessions or stale DNS cache on your local network. Power off your router, wait 30 seconds, and power it back on.
  3. Wait 30 minutes to 2 hours — Some connection issues are caused by stuck sessions on the network side. These sessions time out and clear automatically, but it can take anywhere from 30 minutes to 2 hours.
  4. Test with a simple curl command:
    curl -x http://USERNAME:PASSWORD@HOST:PORT https://httpbin.org/ip

    If this returns the proxy IP, your proxy is working and the issue is in your application\'s configuration.

  5. Try a different network — If possible, test from a mobile hotspot or different Wi-Fi network to rule out ISP-level blocks.

Still Not Working?

Contact support with:

  • The exact error message you are seeing.
  • Your proxy host and port (do not share your password).
  • The application or browser you are using.
  • Your approximate location and ISP.