Why is my website unavailable?

Possible reasons for website unavailability

Site24x7 monitors the availability of your website by sending an HTTP request to the webserver and checks the status code of the returned response. A 200 OK success response indicates that the website is available. We will consider a website unavailable for several reasons. Some of the major reasons are listed below: 
  1. When the website is not accessible
  2. When the website's response time crosses 30 seconds, (Note: You can check your web server access logs: User-Agent: Site24x7 to corroborate this.)
  3. If the HTTP Response code is 4XX or 5XX
  4. In case of authenticated websites, mismatch or invalid username/password
  5. If there is a failure during the SSL handshake process
We will change the status of the website monitor to "Down" for all the above reasons and trigger an alert notification.

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