# Which of the following is a valid way to debug a failing HTTP-01 challenge?

cert-manager, Hard (Expert), Troubleshooting. https://k8wiz.com/uquiz/which-of-the-following-is-a-valid-way-to-debug-a-failing-http-01-challenge

- A. Checking if the created ingress resources are correctly routing to the cert-manager challenge solver
- B. Verifying DNS propagation
- C. Checking if the certificate is in the browser's trust store
- D. Validating the certificate chain

**Answer:** Checking if the created ingress resources are correctly routing to the cert-manager challenge solver

**Explanation:** A valid way to debug a failing HTTP-01 challenge is to check if the created ingress resources are correctly routing to the cert-manager challenge solver. HTTP-01 challenges work by creating temporary ingress resources that route specific paths to a cert-manager pod that responds with the challenge token.