Guides
Apache
Guides
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How to fix ERR_SSL_PROTOCOL_ERROR
The browser and server could not agree on a secure connection at all. Usually HTTPS is not set up on that port, or the…
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How to fix ERR_CONNECTION_REFUSED
The server answered, but nothing was listening on that port. Usually the web server is stopped, listening elsewhere, or a firewall rejects you.
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How to fix 404 Not Found errors on your site
A few 404s are normal. Sudden ones, or every page except the home page, point to a broken rewrite, a moved page or a…
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How to fix 403 Forbidden
The server found the page but will not show it. Usually file permissions, a missing index file, or a security rule. Here is how…
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How to fix 500 Internal Server Error
A 500 is the server’s way of saying “something broke and I won’t say what”. The error log will. Here is where to find…
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How to fix 504 Gateway Timeout
The backend is alive but too slow. Find the slow request, raise the right timeout only if the work is genuinely long, and fix…
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How to fix 502 Bad Gateway
A 502 means the web server asked the program behind it for a page and got no usable answer. Find which part failed in…