Website up or down checker

What does the checker check?

It requests the page once, follows up to 5 redirects, and reads the first 64 KB of the page, which is enough to time the answer. It reports:

• Final status: the HTTP status code of the last answer.
• Total time: how long all the steps took together.
• Time to first byte: how long the server took to start answering the last request.
• Server header: the web server or service that answered, if the site says.
• Every step: each redirect with its address, status and time.

When we checked http://webstribe.com, the tool showed two steps: a 301 redirect to https://webstribe.com/, then 200 OK.

This is a one-time check, not monitoring. It does not watch your site or send alerts.

How do I read the result?

• 200 OK: the site is up and answered normally.
• 301 or 302: a redirect. The checker follows it and shows the next step.
• 403: the server refused the request. A firewall or security plugin may block automated checks.
• 404: the page does not exist at that address.
• 500: the site’s code failed. Check the error log.
• 502, 503 or 504: the server, or something in front of it, is down or overloaded.

A slow time to first byte usually points at slow PHP, a slow database or a missing page cache, not at large images.

Questions and answers

The site works for me but the tool says it is down. Why?

Your browser may show a cached copy, or the site may block requests that come from servers. A firewall or a security plugin can refuse automated checks while it allows browsers.

Can I check a port other than 80 or 443?

No. The checker only connects to the standard web ports.

Why is the first check slower than the next one?

The site’s page cache may be empty on the first request, and DNS and TLS take longer the first time. Run the check twice to compare.

Can it watch my site all the time?

No. It checks once each time you press the button.

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