![]() Our health check (client) was not able to match a name on the server certificate to the hostname of the request. If you’re using a self-signed certificate, we recommend either using a publicly trusted certificate or setting the allow_insecure property on your monitor to true. The certificate is not trusted by a public Certificate Authority (CA). ![]() TLS untrusted certificate error Cause ![]() SolutionĮnsure the expected_body is in the first 10 KB of the response body. If you return a larger response, and the expected_body is not in the first 10 KB, the health check will fail. Note that we only read the first 10 KB of the response. The response body returns from your origin server and does not include the (case-insensitive) value of expected_body configured in your monitor. SolutionĮither change your Cloudflare monitor configuration to use HTTPS, or set the value of follow_redirect to true so that we can resolve the correct status code. In this case, the response code will often be 301, 302, or 303. You may also see this issue if you have a monitor configured to use HTTP connections and your origin server is redirecting to HTTPS. Use the List Monitors API command to confirm the values are correct. Response codes must match the expected_codes. We recommend increasing the HTTP response timeout to allow the origin server to respond.Ĭloudflare receives an HTTP status code that does not match the values defined in the expected_codes property of your Cloudflare monitor configuration. ![]() ![]() This happens if you have the timeout set to a low number - 1 or 2 seconds, for instance. The origin failed to return an HTTP response within the timeout configured. Ensure your network and firewall configurations are not interfering with load balancing traffic. This typically occurs when there is a network failure between Cloudflare and your origin, and/or a firewall refused to allow our connection. Our health checks failed to establish a TCP connection to your origin server. If a health check fails, the breakdown will include the reason.įor a list of optional parameters, which are useful for filtering log results, see Cloudflare API: Health Check Events.Ĭommon troubleshooting causes and solutions are listed below. ![]()
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