What is Error Code 521 And How To Resolve It?
When surfing the internet, the appearance of error codes like ‘Error 521: Web server is down’ can be very frustrating, as it can hamper your browsing experiences. It is common for people to spend hours wondering why this issue appears and whether it is possible to fix it or not.
Well, you do not need to worry, as this article will tell you all about the error code and the possible methods that you can use to resolve it. Get ready to know what methods will work for you, whether you are a customer or a website owner.
Introduction to the Error Code 521
The Error Code 521 usually accompanies a message ‘Web server is down’ when it appears on your screen. The error happens when Cloudflare is not able to establish a connection with the server that you are trying to access. This means that the website’s server is either offline or refusing to connect with your server.
There are numerous reasons that can result in this error, and before exploring the methods that you can use to resolve it, you should also be familiar with the causes behind error code 521.
- Misconfigured DNS settings - It is possible that the domain name system, which directs traffic to the correct server, is not correct. In this case, Cloudflare will not be able to find it.
- Cloudflare IP addresses are blocked - If you have an antivirus system or firewall installed that is blocking the IP address of Cloudflare, then it will result in this error.
- Cloudflare’s “Under Attack” mode - The ‘I’m Under Attack’ mode of Cloudflare is a feature that shields your website from DDoS attacks. However, if this feature is not correctly configured, then it can block people from accessing the website.
- Network or connection problems - Lastly, the most common reason behind this issue can also be issues with the internet that you are using. It is possible that the network strength is not strong enough.
What are the common methods to resolve the Error Code 521?
Now that you have a basic understanding of the ‘web server is down error code 521’ along with its causes, let’s move forward and learn the methods that you can use to resolve it.
Make sure the original server is up and running
As a website owner, you need to make sure that your website is up and running. Cloudflare will not be able to connect to your server if the website is not up and running, which is why you should ensure that your website is not facing issues.
Verify the SSL/TLS Settings
It is also possible that the SSL or TLS Settings of your website are not configured properly. In this case, Cloudflare will find it difficult to establish a connection between the website and the user. You should ensure that the SSL certificate of your website is valid and properly installed.
Apart from these methods, you can also restart your web browser and review security tools and firewalls to troubleshoot the issue. Use the website Datarecovee to learn other detailed methods to fix it without issue.
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