Cloudflare, a popular service for protecting websites from malicious activities and DDoS attacks, sometimes blocks visitors.

When you see an 'Attention Required' message on a website using Cloudflare, it typically means that your request triggered its security system.

This can happen due to several reasons including submitting specific content, attempting suspicious actions such as SQL injection or cross-site scripting (XSS), or sending malformed requests.

Once triggered, Cloudflare protects the site by blocking further attempts from your IP address until the issue is resolved.

To resolve a Cloudflare block:
- Try accessing the website later, as temporary issues may have caused the block.

- If the problem persists, you can contact the site's owner directly to inform them about the block.

Provide details of what you were doing when you encountered the message and include the 'Cloudflare Ray ID,' which is a unique identifier found at the bottom of the 'Attention Required' page.

Site owners may need to take steps to unblock users, such as verifying that no malicious activity was intended or adjusting their security settings.

They might also provide guidance on how visitors can safely interact with their site without triggering security measures.