When a website is protected by Cloudflare, there are several occasions when it will challenge visitor traffic:
- The visitor’s IP address has shown suspicious behavior online (as tracked by ).
- The website owner has blocked the country associated with the visitor’s IP address.
- The visitor’s actions have activated a enabled by the website owner.
If the visitor passes the challenge, their request is allowed. If they fail, the request will be blocked.
Managed challenges are where Cloudflare dynamically chooses the appropriate type of challenge based on the characteristics of a request. This helps avoid , which also reduces the lifetimes of human time spent solving CAPTCHAs across the Internet.
Depending on the characteristics of a request, Cloudflare will choose an appropriate type of challenge, which may include but is not limited to:
- A non-interactive challenge page (similar to the current ).
- An invisible proof of work challenge to the browser.
- A custom interactive challenge (such as click a button).
- A CAPTCHA challenge.
Currently, Managed Challenge actions are available in the following security products:
Legacy CAPTCHA challenge
CAPTCHA challenges require a visitor to interact with a visual image, usually identifying specific letters or characteristics of the image. Cloudflare does not recommend using Legacy CAPTCHAs.
When your application sends a challenge, your visitors either receive a non-interactive challenge page or a CAPTCHA.
Challenges are not supported by Microsoft Internet Explorer. If you are currently using Internet Explorer, try using another major web browser (Chrome, Safari, Firefox).
If you are already using a major web browser, make sure it is using the latest version.
If your visitors are using an up-to-date version of a major browser — such as Chrome, Firefox, Safari, Microsoft Edge, Chrome and Safari on mobile — they will receive the challenge correctly.
Challenges are not supported by Microsoft Internet Explorer.
If your visitors encounter issues using a major browser besides Internet Explorer, they should upgrade their browser.
Resolve a CAPTCHA
If a visitor encounters a CAPTCHA, Cloudflare employees cannot remove that Captcha. Only the website owner can configure their Cloudflare settings to stop the CAPTCHA.
When observing a Cloudflare Captcha page, a visitor could:
- Request the website owner to allow their IP address.
- Scan their computer for malicious programs (it may be infected).
- Check their antivirus or firewall service to make sure it is not blocking access to the CAPTCHA image.