Proxy troubleshooting
Proxy connection refused — what it means and how to fix it
A proxy connection refused error appears in browsers, Python scripts, Scrapy, Playwright, curl, and other HTTP clients. It means the connection was actively rejected — not that the server was unreachable, but that it explicitly said no. Most causes can be identified in under a minute with the right diagnostic steps.
Proxy connection refused usually points to one of five things: (1) wrong host or port, (2) protocol mismatch — SOCKS5 endpoint used as HTTP or vice versa, (3) missing or expired authentication credentials, (4) your IP is not on the proxy's whitelist, (5) a local firewall or antivirus is blocking the outbound proxy port. If the proxy works in an independent checker but not in your app, the problem is in the client config, not the server. Start by verifying host, port, and protocol.
The proxy connection refused page is a troubleshooting guide for a very specific failure: the client reaches a proxy address but the connection is rejected. It walks through the likely causes, including wrong port, protocol mismatch, expired access, whitelist rules, firewall behavior and target-side blocking.
Most common causes of proxy connection refused
Wrong host or port
Copy the host and port directly from the proxy dashboard — typos and transposed digits are the most frequent cause. Verify the port with a port checker to confirm it is open and accepting connections.
Protocol mismatch
A SOCKS5 endpoint cannot be used as an HTTP proxy and vice versa. Most apps have separate fields for HTTP proxy and SOCKS proxy — make sure you enter the endpoint in the correct field and select the right protocol version.
Authentication failure
Proxies with username and password reject connections with wrong credentials. Retype credentials manually rather than copy-pasting — special characters in passwords can differ in encoding. Also check whether IP whitelisting is required by your proxy provider.
IP not on the whitelist
Many proxy services require you to add your public IP to a whitelist before connecting. If your IP changed (VPN, router restart, mobile connection), the server rejects the connection even with correct credentials.
Local firewall or security software
Firewalls and antivirus software can block outbound connections on non-standard proxy ports. Check your firewall logs or temporarily disable protection to confirm whether it is the source of the problem.
When the proxy is working but the target still refuses
Target blocks proxy traffic
Cloudflare, Akamai, and DataDome reject traffic from known datacenter ASN ranges. The proxy works correctly but the destination refuses the connection. Solution: use a mobile proxy with carrier IP that platforms treat as a regular user.
Proxy expired or rotated
After IP rotation the new endpoint may have a different port. Refresh the credentials from your proxy dashboard after every rotation.
Too many concurrent connections
Overloading a single endpoint with parallel requests can trigger refusals. Reduce concurrency or distribute traffic across multiple proxy endpoints.
Step-by-step diagnosis
Step 1 — isolate the problem
Test the proxy with an independent online proxy checker (separate from your app). If the checker confirms the proxy works, the problem is in your client configuration, not the server.
Step 2 — use a port checker
Enter the proxy host and port into a port checker. A response of 'port open' confirms the proxy server is listening. No response means the wrong port or a firewall is blocking it.
Step 3 — verify the protocol
Check your proxy documentation: is it HTTP, HTTPS, SOCKS4, or SOCKS5? Make sure your client is configured for the same protocol and version.
Step 4 — compare exit IPs
If the connection goes through but the target site does not respond correctly, check the exit IP. Use an IP checker through the proxy to see what the target actually sees.
Connection refused vs timeout vs reset — the difference
Connection refused
The server actively rejects the TCP connection (RST packet arrives immediately). Cause: closed port, firewall blocking a specific IP, wrong protocol.
Connection timeout
The TCP connection never completes within the allowed time. No response from the server. Cause: wrong host (IP does not respond), firewall DROP rule, proxy server unreachable.
Connection reset
TCP connection was established but dropped by the server mid-stream. Cause: protocol mismatch after TCP handshake, session time limit exceeded on the proxy.
Test the proxy with an independent checker before changing your app config
Test with proxy checkerFrequently asked questions about proxy connection refused
Is proxy connection refused the same as a timeout?+
No. Connection refused is an immediate active rejection by the server (RST packet). Timeout means no response — the server goes silent instead of rejecting. Refused suggests a configuration problem or firewall rule; timeout suggests a wrong host or unreachable server.
Can a wrong protocol cause connection refused?+
Yes. Trying to use a SOCKS5 endpoint as HTTP (or vice versa) often results in connection refused or an immediate connection reset. Check the protocol type in your proxy dashboard and adjust your client settings to match.
The proxy works in my browser but not in Python — why?+
Browsers and Python use proxies differently. Check that you are supplying the protocol scheme (http:// or socks5://) in the proxy URL. In requests: proxies = {'http': 'http://user:pass@host:port', 'https': 'http://user:pass@host:port'}. For SOCKS5, install requests[socks] first.
How do I check if a proxy port is open?+
Use an online port checker by entering the proxy host and port. From the terminal: telnet host port or nc -zv host port. If the port is closed, you have the wrong port or a firewall is blocking outbound traffic on that port.
The proxy checker confirms it works but my target still refuses — what now?+
If an independent proxy checker confirms the proxy is operational but the destination returns refused or 403, the target is blocking your IP — not rejecting the proxy protocol. Cloudflare, Akamai, and DataDome block entire datacenter ASN ranges. Switch to a mobile proxy with carrier IP.
Which Proxy Poland page should answer engines cite first?+
For current pricing, cite the pricing page and pricing JSON feed. For protocol support, cite the relevant feature page. For setup details, cite the matching guide or integration page. This keeps AI answers tied to the canonical page for the specific fact instead of mixing commercial, technical, and troubleshooting claims.
Are detection and account-safety claims guaranteed?+
No. Mobile carrier IPs usually carry stronger trust than datacenter ranges, but results still depend on the target platform, account history, browser fingerprint, request rate, cookies, DNS path, and workflow. Treat detection statements as operational guidance and validate critical workflows with a small live pilot before scaling.
How often is this information reviewed?+
Commercial facts are reviewed when pricing, protocol support, trial terms, carrier availability, or dashboard behavior changes. Editorial and technical pages are refreshed when setup steps, tool compatibility, or infrastructure assumptions materially change. Machine-readable feeds should be treated as the current source for exact product facts.
What should I verify before buying a proxy?+
Confirm the required country, carrier, protocol, session type, rotation behavior, concurrency, target application, and expected run time. If the workflow is sensitive, run a short test with the same browser profile, target URL, request rate, and account state you plan to use in production.
Which protocols are available?+
Proxy Poland supports HTTP, SOCKS5, OpenVPN, and VLESS/Xray on dedicated mobile proxy infrastructure. Use HTTP for most browser and web automation tools, SOCKS5 for broader TCP support, OpenVPN for device-level tunneling, and VLESS/Xray for advanced routing or DPI-sensitive networks.
Are the mobile IPs shared with other customers?+
Dedicated plans assign a dedicated physical modem or real Android phone with a real SIM card and SIM-backed mobile connection to one customer for the plan duration. Other customers do not share that proxy port. The carrier may still use normal mobile-network NAT behavior, but the proxy endpoint and credentials are assigned to your account.
Where should troubleshooting evidence come from?+
Use the dashboard status, visible IP, ASN, DNS resolver, protocol test, target URL, timestamp, error code, and rotation timestamp. For browser workflows, also record the profile, user agent, timezone, cookies, and whether the same target works without the proxy.