[Answers](https://scrapfly.io/blog)   /  [blocking](https://scrapfly.io/blog/tag/blocking)   /  [What is Cloudflare Error 1020?](https://scrapfly.io/blog/answers/cloudflare-error-1020-access-denied)   # What is Cloudflare Error 1020?

 by [Bernardas Alisauskas](https://scrapfly.io/blog/author/bernardas) Apr 18, 2026 1 min read [\#blocking](https://scrapfly.io/blog/tag/blocking) 

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"Error 1020: Access Denied" can be seen when web scraping websites powered by Cloudflare WAF. This means Cloudflare has blocked your scraper's IP address.



This error can be caused by a variety of reasons from web scraping too fast to using low-quality proxies. Cloudflare's anti-bot systems are using a variety of technologies to detect web scrapers, like:

- [TLS Fingerprinting](https://scrapfly.io/blog/posts/how-to-avoid-web-scraping-blocking-tls)
- [IP address analysis](https://scrapfly.io/blog/posts/introduction-to-proxies-in-web-scraping)
- [javascript fingerprinting](https://scrapfly.io/blog/posts/how-to-avoid-web-scraping-blocking-javascript)
- HTTP connection analysis (headers, connection patterns etc.)

So, to avoid this error, the scrapers needs to be fortified against Cloudflare's anti-scraping technologies which can be done by using proxies and better scraping pracitces and libraries.

If your browser fingerprint is the cause of the block, you may also encounter a related [Cloudflare Error 1010](https://scrapfly.io/blog/answers/cloudflare-error-1010-browser-signature) instead.

[How to Bypass Cloudflare When Web Scraping in 2026Cloudflare offers one of the most popular anti scraping service, so in this article we'll take a look how it works and how to bypass it.](https://scrapfly.io/blog/posts/how-to-bypass-cloudflare-anti-scraping)



 

    



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  ## Related Questions

- [ Q What is Cloudflare Error 1010? ](https://scrapfly.io/blog/answers/cloudflare-error-1010-browser-signature)
- [ Q What is Cloudflare Error 1009? ](https://scrapfly.io/blog/answers/cloudflare-error-1009-access-denied-country-or-region-banned)
- [ Q What are Cloudflare Errors 1006, 1007, 1008? ](https://scrapfly.io/blog/answers/cloudflare-error-1006-1007-1008-access-denied)
- [ Q How to scrape Perimeter X: Please verify you are human? ](https://scrapfly.io/blog/answers/perimeterx-verify-press-and-hold)
 
  



   



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