HTTP Error 505 is a common error that occurs in web servers. A technical expert can easily solve this. Before knowing how to fix HTTP Error 505 Version Not Supported, one needs to know what HTTP, HTTP Error 505 means and the causes of this error. Before knowing how to fix HTTP Error 505 Version Not Supported, one needs to know what HTTP, HTTP Error 505 means and the causes of this error.
HTTP
HTTP is an acronym for Hypertext Transfer Protocol. It is a client-server protocol. Hypermedia documents such as HTML can be transmitted using an application-layer protocol known as HTTP. HTTP is a medium through which two unrelated objects can communicate. It was developed to facilitate communication between web servers and web browsers. There are different major and minor versions of the HTTP protocol. The World Wide Web (WWW) is built on HTTP. Hypertext links are used to load web pages using HTTP.
HTTP Error 505
HTTP error 505 is a web server error. The browser will display HTTP error 505 when a server either does not support or is unable or unwilling to complete the major version of HTTP used in the request message sent by the client. HTTP status codes are another name for web error codes. Depending on the type of error the user encounters, there are five distinct categories of HTTP status codes that always begin with a digit.
Open a telnet connection to some major website and run the following command to test it:
GET / HTTP/4.0
You may get the following response:
505 HTTP Version is Not Supported Server: HTTP/1.1 Cloudflare
Date: Mon, Dec 19, 2022, at 17:12:25 GMT Content-Type: HTML/text
Content-Length: 102
If you encounter this error in your web browser, try switching to a more recent version or a more recent version to see if it disappears. Additionally, if this error persists in your web browser, you should upgrade the software that runs your original web server so that it is compatible with the most recent version of the HTTP protocol that you require.
The supported protocols of your origin server should be listed in the error message. Consequently, to correct the error, we must check those protocols. The error may indicate specific program names that do not support the protocol. In that case, check the data to determine the source of the error. Additionally, avoid any whitespace after the HTTP version, as this may cause this error. Additionally, it is essential to ensure that the URL is correct and free of any special characters.
Steps are involved whenever a user interacts with a web server
- Find the site’s IP address by looking at its URL without the leading “http://” character Domain name servers (DNSs) provide this lookup or IP name to IP address conversion.
- Create a connection to an IP socket at that IP address
- Via that socket, you can write an HTTP data stream
- In response, receive an HTTP data stream from the web server The HTTP protocol assigns status code values to this data stream. Parse this data stream to find status codes and other useful information.
Cause of HTTP Error 505
- HTTP version is followed by a whitespace.
- URL is copied badly in the telnet connection.
- The web server is unable to complete the major version of HTTP.
- The client is not a web browser.
How to resolve HTTP error 505 from the client side
There are two easy solutions if your browser displays error 505.
- As a first step, check if you are using an older browser such as Microsoft’s Internet Explorer. Your browser is trying to connect to a modern web server using an older HTTP version in such cases Therefore, upgrading to a more up-to-date browser like Firefox or Google Chrome is the most effective solution to this problem.
- Errors like 505 “HTTP version not supported” can occur when the cache and website content do not always match the time. This is a server-side issue; If the problem persists after clearing the cache, there’s not much you can do about it. In Google Chrome, the cache can be cleared by following the steps: Open Chrome and click the three dots at the top right of the Google Chrome browser → More tools and → Clear browsing data → Choose Delete → Tick the boxes next to cookies, other site data, click Cached images and files → Clear data.
How to resolve HTTP Error 505 from the server side
The first step in troubleshooting the problem is to see which HTTP variant your web server uses. To accomplish this, use telnet on Windows or the curl command on Linux. We’ll talk about how to use the Linux command line to check the HTTP version, as there are plenty of online instructions on telnet.
We need to start in the terminal first. You can accomplish this in most distros by accessing the Applications menu by pressing Ctrl+Alt+T. Enter the command http://example.site/ in the terminal and press return. The “example.site” command should be replaced by your website address. When you run this command you will get a list of properties.
The following format will be used for the first line of the response: HTTP/#, where # refers to the web server’s version of HTTP. The HTTP version of our website is shown as 2. If this number is below 1.1. Modern browsers will not be able to properly interact with this number if it falls below 1.1. You need to update your web server to the latest version. Everything will be taken care of by updating your hosting control panel, such as Plesk or cPanel.
However, a problem with WordPress will require a different solution for a different reason
Problems can occur when WordPress plugins try to connect to third-party websites when traveling on an outgoing link. For example, suppose you want to direct your customers to your Amazon-sold products. While it’s perfectly acceptable to use static URLs for your products, people clicking on them from your website will get a 505 error.
This is usually the result of a plugin and the difference between the HTTP version of the third-party website and the actual destination. You can check this by using the curl above to compare the HTTP version of your website with the one you are linking to. There are two solutions to this problem. If you only use a few, we recommend turning off each plugin individually to identify issues. After that, you can use your option or code to replace it. You may have too many plugins to find the cause of the 505 error, or even if you do, you won’t be able to get rid of it. Although merely a workaround, the following approach may be worthwhile.
Start blogging on self-hosted WordPress on top-tier hardware with NVMe storage and minimal global latency. Always select your preferred distribution. Disabling the WordPress Link Checker, which detects and reports broken links, is the second step in this procedure. Most of the time, this is a useful tool that allows you to get rid of old and unwanted links. This can cause damage to your website if it starts reporting working links as broken due to plugins. False reports of broken links can make it impossible to conduct a real analysis of your website, and too many links that appear to be broken can hurt your SEO ranking. We need to disable link checkers for websites causing false alarms to avoid those websites. You can exclude working links from Link Checker by following the steps listed below after identifying all the links that continue to respond with a 505 error code:
WordPress Main Dashboard → Settings → Link checker → Links to check → Add the domain to the exclusion list → Save.
Conclusion
HTTP has many flaws. HTTP error 505 is a server error. Server Error 5xx consists of each error in the list. Some server errors are Error 500 (Server is unable to detect generic error messages), Error 501 (Server does not have enough power to execute the request), Error 502 (Invalid response received by server), Error 503 (Server overload), Error 504 (Server not able to detect requests at certain times), etc. For specific web error codes, there are specific troubleshooting steps. However, when users encounter such errors, they can also use standard repair methods to fix the error.
