When a proxy goes silent: diagnosing timeouts step by step

Why proxies time out

• The local network drops the proxy port. Office, hotel and university Wi-Fi often discard traffic to uncommon ports instead of rejecting it, so the client waits until it gives up.
• Your code's limit is too tight. A proxy in a faraway country needs a moment longer to complete the handshake. A 2–3 second limit can cut off a proxy that is perfectly healthy.
• The proxy or the target is busy. The proxy accepts your connection, then waits for the website, and your timeout fires first.
• A mistyped IP. If the typo lands on an address that never responds, you get silence rather than a refusal.

The outputs we recorded

Our test proxy accepted TCP connections and then never replied. We sent the same request with two different time limits; the address and login are shown as 203.0.113.10:8080 and user123:pass456.

What to try in each setup

• Windows and Chrome: use the same proxy over your phone's mobile data. If the timeout disappears, your usual network is blocking it; continue with checking the proxy and the firewall.
• Antidetect browsers: the built-in proxy check typically waits a fixed time. Run it a few times; if only some profiles fail, compare their proxy line with a profile that works.
• Telegram: hanging on "connecting" after you add a proxy is often a timeout as well. Test the line in the checker before changing anything in Telegram (Telegram setup).
• Python requests: pass timeout=(10, 30), which allows 10 seconds to connect and 30 to read. Catch requests.exceptions.ConnectTimeout and requests.exceptions.ReadTimeout separately so you know which phase hangs, and add a few spaced retries instead of removing the limit. See Python requests setup.
• curl: --connect-timeout isolates the connection step, while -m caps the entire command.

Slow is not the same as silent

A slow proxy still replies, just late. The proxy speed test measures real response times. When they sit close to your software's limit, raise the limit or pick a proxy in a country nearer the target. When repeated tests never get any reply, it is a true timeout, and the next step is a support ticket that includes the checker result.

Step by step

1. 1

   Confirm it in the checker

   Paste the proxy line into the proxy checker. A timeout result means nothing came back within the wait limit.

2. 2

   Change networks

   Repeat the test on mobile data. If it passes, the original network or its firewall is responsible.

3. 3

   Measure response times

   Use the proxy speed test to tell a slow proxy from a silent one.

4. 4

   Adjust limits and retries

   Set the connect limit to about 10 seconds, add a few retries, and run your task again.

Frequently asked questions