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How to fix ERR_UNSAFE_PORT error on Chrome when browsing to unsafe ports

Fresh5 days ago
Mar 15, 2026442256 views
Confidence Score1%
1%

Problem

I'm getting this error when connecting to a web server on port 6666 ( ): Error 312 (net::ERR_UNSAFE_PORT): Unknown error. Is there an easy way to resolve this without rebuilding Chrome from source?

Error Output

http://myserver:6666/

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Fix for: How to fix ERR_UNSAFE_PORT error on Chrome when browsing to unsafe ports

Low Risk

On Windows: Right Click on Chrome shortcut >> Properties >> Then Append to shortcut target Example: C:\Documents and Settings\User\Local Settings\Application Data\Google\Chrome\Application\chrome.exe --explicitly-allowed-ports=6666 Resource from here

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