My monitor shows DOWN but my site is up
If your monitor shows DOWN but you can visit the site in your browser without any problem, there are a few common causes to check.
Your server is blocking the monitoring requests
Some servers, firewalls, or CDN configurations block requests from unknown sources or unfamiliar user agents. Alive24x7 sends requests with the header User-Agent: Alive24x7/1.0. If your server has a firewall rule that blocks this, it will refuse the connection and the monitor will show DOWN.
To fix this, add Alive24x7/1.0 to your server's allowed user agents, or whitelist the IP addresses used by Alive24x7. Contact support at 24x7@bissano.com.au for the current list of monitoring IP addresses.
Your site requires authentication
If your URL is behind a login page, HTTP basic authentication, or an IP allowlist, Alive24x7 will not be able to access it and the monitor will show DOWN. Use a URL that is publicly accessible, such as a dedicated health check endpoint.
Your server returns a non-2xx status code
Alive24x7 considers any response outside the 200–299 range as a failure. If your server returns a 301 redirect, a 403 Forbidden, or any other non-2xx code, the monitor will show DOWN even if the page loads in a browser (browsers follow redirects automatically; Alive24x7 does not).
Check the error message shown on the monitor detail page — it will tell you the exact HTTP status code that was returned.
The check timed out
If your server is slow to respond, the check may time out before a response is received. Try increasing the timeout in the monitor settings. If your server is consistently slow, that is itself worth investigating.