This is often called a "false positive." Several factors can cause this:

• IP Blocking: Your server may be blocking requests from BigTimeUp's monitoring servers
• Rate Limiting: Your site's firewall or CDN may be rate-limiting our checks
• Temporary Downtime: Your site may have been briefly unavailable during the check
• Slow Response: Your server took longer than 30 seconds to respond (timeout)
• Redirect Loop: Your site may have a misconfigured redirect

1. Check your site's check history in BigTimeUp to see if it's consistently down or just occasional failures
2. Review your server logs for the time when the check failed
3. If you're using a WAF or CDN (Cloudflare, etc.), whitelist BigTimeUp's monitoring
4. Ensure your site responds within 30 seconds
5. Verify there are no redirect loops or DNS issues

If you're not getting alerts when your site goes down:

1. Check Spam/Junk Folder: Alert emails may be filtered. Add [email protected] to your safe senders list
2. Verify Email Address: Ensure you've verified your email address (check for verification email in inbox)
3. Confirm Organization Membership: Make sure you're a member of the organization that owns the monitored site
4. Check Email Provider: Some corporate email systems block automated emails. Contact your IT department
5. Test Alert Delivery: Temporarily stop your test site to trigger an alert

If none of these steps work, contact [email protected] with your account email.

SSL certificate validation issues can occur for several reasons:

• Self-Signed Certificate: BigTimeUp only recognizes certificates from trusted Certificate Authorities
• Expired Certificate: The certificate may have actually expired
• Incomplete Chain: Your server isn't sending the full certificate chain
• Wrong Certificate: Server is serving a certificate for a different domain

1. Use an SSL checker tool (like SSL Labs) to verify your certificate configuration
2. Ensure you're using a certificate from a trusted CA (Let's Encrypt, DigiCert, etc.)
3. Verify your server is sending the complete certificate chain
4. Check that the certificate matches your domain name
5. If using a CDN, ensure SSL is properly configured

BigTimeUp requires a specific URL format for monitoring:

• Must include protocol: https:// or http://
• Must be a valid, publicly accessible URL
• Must include a domain name (IP addresses not currently supported)
• Ports other than 80/443 are not currently supported

• https://example.com
• https://www.example.com
• https://subdomain.example.com
• https://example.com/specific-page

Response time can vary based on many factors:

• Server Load: Your server may be busier at certain times
• Network Conditions: Internet routing can affect response times
• CDN Caching: Cached responses are faster than uncached
• Geographic Distance: Physical distance between monitoring server and your site
• Time of Day: Peak traffic hours may slow your site

BigTimeUp measures the total time from sending the request to receiving the full response, including DNS lookup, connection time, SSL handshake, and data transfer. This represents real-world performance users experience.