What checks does Oh Dear perform?

Oh Dear consists of several checks to make your life as a developer or sysadmin easier. In general, there are five kinds of categories that we validate on your behalf.

  1. Uptime: as soon as one of your sites is down, we can notify you.
  2. Performance: we keep an eye on the performance and sudden changes in performance characteristics of your sites.
  3. SSL/TLS health: if a certificate is due to expire, has missing certificates in its chains or uses SHA-1 hashing, we'll let you know.
  4. Content validation: we crawl your sites and will notify you when we detected mixed content.
  5. Broken links: we crawl your site and will notify you when we detected a broken link.
  6. Cron job monitoring: as soon as one of your cron jobs doesn't ping us, we'll send you a notification.

All the ip addresses Oh Dear uses to check your sites are listed on this page.

Each check is further described in more detail.

Was this page helpful to you? Feel free to reach out via support@ohdear.app or on Twitter via @OhDearApp if you have any other questions. We'd love to help!