Cloudflare Error 1020: What It Means and How to Fix It

Whether you’re a site visitor or a site owner, seeing the Error 1020: Access Denied message means Cloudflare has blocked requests to a particular website. While this often happens during web scraping, other activities can also trigger this error.

Understanding what has caused the Access Denied error you’re dealing with is the first step to fixing it, but you also need to know how to avoid it. So let’s cover everything: what causes error 1020, how to fix it, and how to make sure you never run into it again.

What is Cloudflare Error 1020?

Error 1020: Access Denied is an error message delivered by Cloudflare when a site visitor breaks a set firewall rule. As a website security service, Cloudflare’s job is to block requests that look suspicious or violate security rules. This way, it protects websites from potentially harmful traffic, scraping attempts, DDoS attacks, spam, and abuse.

In some cases, Cloudflare may also respond with a generic 403 Forbidden response instead of displaying the error 1020 page. This usually happens when using an HTTP client, scripts, or automated tools. It means access was denied by Cloudflare security checks, such as firewall rules, IP reputation, or bot detection.

Error 1015 is another similar error, indicating that access has been temporarily denied due to rate limiting.

Why does Cloudflare Error 1020 occur?

The main purpose of the Error 1020: Access Denied message is to ensure website security. Cloudflare displays this error message to protect websites from unusual traffic, restricted IPs, and requests that violate firewall or security rules.

Here are the most common causes of the Access Denied error.

• IP blocks

Using a VPN or free proxy service can cause Access Denied errors by triggering the site’s security firewall rules. That’s because these services use shared IPs with poor reputation, some even associated with malicious or automated activity.

For that reason, these IPs are usually unreliable and already banned by Cloudflare and other sites and services.

• Suspicious activity

If too many requests are sent from a single IP address within a short time, Cloudflare may flag the activity as suspicious. Since this activity resembles bot-like patterns, it may trigger the Error 1020: Access Denied message.

Whether the high request rates are due to scraping, brute-force attacks, or other automated activity, Cloudflare shows the error to protect the site.

• Browser issues

Certain browser settings or extensions, such as disabled cookies, ad blockers, or privacy-focused add-ons, can affect how Cloudflare identifies requests. In other words, they can make requests look suspicious, even if they are completely legitimate.

• Site owner configurations

Website owners can create custom firewall or security rules, IP restrictions, and geo-restriction measures in Cloudflare. For example, visitors from certain countries or specific IP ranges might be denied access even if their activity is completely normal.

When Cloudflare detects requests that match these rules, it shows the Error 1020: Access Denied message.

How to Fix Cloudflare Error 1020

Once you know the reason behind Error 1020: Access Denied, it’s time to fix it. Let’s take a look at the best ways to get around it, whether you’re a site visitor, scraper, a site owner, or an admin.

For website visitors

If you see the Error 1020: Access Denied message when visiting a site, try the following methods to fix it.

• Clear browser cache & cookies

If your cache and cookies become outdated, corrupted, or blocked, Cloudflare may not be able to recognize your session, which can result in the Error 1020: Access Denied message.

Therefore, clear your cache and cookies to make your browser create a new session with your target site and Cloudflare. Once you clear them, reload the page.

You can also try incognito or private browsing mode to prevent your extensions and cached data from interfering with your requests.

• Disable your VPN or proxy

If the Access Denied error is IP-related, disabling your VPN or free proxy can help you resolve the issue. By switching to a direct connection, you’ll get a different IP address, and your request may no longer look suspicious to Cloudflare.

• Use a different browser or disable extensions

Try to access the site using a different browser and see if that helps you connect. You can also temporarily disable your extensions one by one and reload the page. This will tell you if any of your extensions is causing the error.

• Contact website support

If none of the suggested solutions work or the issue persists, contact the site owner or support team and report the problem. Make sure you include a screenshot of the error message that shows the Cloudflare Ray ID.

The Ray ID is a unique identifier that helps the site owner find the exact rule that caused the Access Denied error and make the necessary changes to resolve it.

For developers and scrapers

If you’re running into error 1020 while scraping data or running automation, it usually means your activity is violating firewall or security rules designed to detect automated or non-human behavior.

Here are the methods to try to handle the error effectively.

• Use rotating proxies

Make sure you use reliable, ethically sourced residential proxies when scraping data or performing any activity involving rapid requests or automation. Residential proxies rotate your IP after each request, mimicking real users and reducing the risk of detection and errors.

MarsProxies’ residential proxies offer ethically sourced, rotating IPs, precise geo-targeting options, and non-expiring traffic, making them ideal for efficient, uninterrupted scraping and automation.

You can also connect with other users in our Discord community to share tips and best practices.

• Customize and rotate user-agent headers

Cloudflare can detect multiple requests coming from the same User-Agent, which often indicates automated traffic. To avoid this, rotate your User-Agent headers and ensure they are formatted correctly to mimic real traffic. This will make your requests appear more like those of legitimate users.

• Mask headless browsers with undetected Chromedriver

Anti‑bot systems can easily detect standard headless browsers and automation tools, which often leads to Cloudflare delivering the Access Denied error. Using an undetected Chromedriver helps mask automation fingerprints by making headless browsers behave more like real users.

• Use web scraping APIs

Using a scraping API is an effective way to bypass Cloudflare error 1020 without dealing with network management. It takes care of IP rotation, request throttling, and user-agent randomization automatically. This is how using a web scraping API can handle anti-bot measures, preventing error 1020 for efficient and scalable data collection.

Overall, by combining premium residential IPs with undetected Chromedriver, rotating User-Agent headers, and web scraping APIs, you can significantly reduce the chances of triggering Cloudflare’s security measures and continue scraping or automating tasks without interruptions.

For site owners/admins

If you or your Cloudflare-protected site visitors are dealing with the Access Denied error, here’s how to resolve it.

• Check Cloudflare Firewall Events

The first step to resolve the issue is to identify which of your firewall rules was violated. To do that, check the Firewall Events Log in your domain Cloudflare dashboard. Once you find which rules have been broken, determine the one behind the error by searching for the visitor’s IP or Ray ID.

• Review and adjust firewall rules as needed

Once you identify which rule is causing the error, go to your Firewall Rules in the dashboard and edit it as needed. You can whitelist trusted IPs or relax overly strict rules to prevent other legitimate users from getting the same error.

• Test to ensure accessibility

After making changes to your firewall rules, test your website from different locations, devices, and networks to confirm that the error is resolved.

Prevention tips for site owners

Here are a few tips to fine-tune your Cloudflare settings, reduce false positives, and keep your site both secure and accessible:

• Set up granular firewall rules: avoid broad IP or country bans, and focus on specific paths, user agents, or suspicious behaviors.
• Monitor and review firewall logs regularly: check Cloudflare’s Firewall Events Log to identify overly strict rules and adjust them before they lock out legitimate users.
• Provide a helpful “blocked” page: include a clear explanation, the Cloudflare Ray ID, and instructions for users to contact support or retry access.

Conclusion

Seeing error 1020 as a site visitor or scraper means a website’s security firewall has blocked your request due to hitting a specific rule set by the site owner. As a site admin or owner, managing and adjusting firewall rules regularly can help you prevent this error and keep the site both safe and user-friendly.