Proxy connection failed? Follow these steps to troubleshoot#

Proxy connection failures are usually not caused by a single issue. Most problems fall into these 4 areas — troubleshoot in order:

① Check if the proxy configuration is correct#

This is the most common source of issues. Please verify:

• Whether the proxy type matches (HTTP / HTTPS / SOCKS5)
• Whether IP and port are entered correctly (no spaces, no missing characters)
• Whether username and password are filled in correctly (no spaces, no missing characters)
• Whether the format meets requirements when importing in bulk

Configuration errors are the most common cause — check this first.

② Check your local network environment#

If the configuration is correct but still fails, check your current network:

• Whether you can access the target website normally
• Whether there are network restrictions (corporate/school network)
• Whether you are using a system proxy or network tool

👉 Tip: Try switching to a mobile hotspot to quickly determine if it’s a local network issue.

Use ClonBrowser’s built-in network detection feature to check local network and system network.

If no local proxy is set, the network connection should be set to “Do not use any proxy.”

If a local proxy is set, choose “Follow System” or “Custom Proxy” depending on the proxy situation.

③ Test if the proxy IP is available#

It’s recommended to verify outside of ClonBrowser:

• Test in a local browser: Manually configure the proxy in a regular browser like Chrome or Firefox, try accessing the target website, and see if it connects;
• Test using IP detection websites: Use professional detection tools like Whoer, BrowserLeaks, etc., to verify if the proxy connects.

If the proxy also doesn’t work in other environments, it means: the proxy itself has expired or is unavailable — contact your proxy provider.

④ Check local software or system restrictions#

If the proxy itself is fine but ClonBrowser can’t connect, check the following one by one:

• Firewall or antivirus software, security managers, firewalls blocking — add ClonBrowser to the whitelist
• Network tools not properly enabled (no global proxy), whether the system proxy is active
• Local port occupied or restricted

👉 Tip: Temporarily disable security software or switch to a different network environment for testing.

If the above steps still don’t resolve the issue

Please provide the following information when contacting customer support:

• Client version
• Proxy configuration screenshot
• Proxy external test results
• Error message screenshot

This helps locate the issue faster.