What Is 504 Error "Gateway Timeout": Meaning and How to Fix Issue

What Is 504 Error

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What is HTTP 504 Status Code?

A 504 Gateway Timeout error is an HTTP status code indicating that a server, acting as a gateway or proxy, didn’t get a response from the upstream server in time to complete a request. This error falls in the 5xx category, representing server-side errors. It often arises due to network issues, server overload, or issues with the upstream server. It’s typically beyond a client’s control to resolve.

HTTP 504 error messages can vary based on the web server, the website’s system, the browser being used, or the network equipment involved.

Here are some common variations of the 504 error message:

  • 504 Gateway Timeout
  • HTTP 504
  • 504 ERROR
  • Gateway Timeout (504)
  • HTTP Error 504 – Gateway Timeout
  • HTTP Status 504 – Gateway Timeout
  • 504 Gateway Time-out – The server didn’t respond in time
  • Error 504

Regardless of the exact phrasing, all these messages indicate the same issue: a server acting as a gateway did not receive a timely response from another server when it attempted to load the webpage or fulfill another request by the browser.

SEO Impact of the 504 Gateway Timeout

504 status code can indeed have a negative impact on a site’s SEO for several reasons:

Search Engine Crawling Search engines use bots to crawl websites and index their content.
If these bots encounter frequent 504 errors, they may not be able to properly index your website, potentially leading to decreased visibility in search engine results.
Site Reputation Search engines strive to provide the best user experience, which includes returning reliable sites in their search results. If a site consistently returns 504 errors, it can be seen as unreliable, which might result in lower rankings.
User Experience 504 can lead to a poor user experience. A frustrated user may leave the site quickly, leading to a high bounce rate and low time-on-site ā€” two factors that search engines may consider in their ranking algorithms.
Lost Link Equity If other sites are linking to your pages, and those pages are returning 504 errors, the link equity (a factor in search engine ranking) that would be passed from those sites to yours could be lost.

Overall, consistent 504 can have a negative impact on your SEO, so it’s crucial to monitor and address them promptly to maintain your site’s search engine rankings and user experience.

504 Gateway Timeout Common Reasons and How to Fix Them

Before diving into specific issues, it’s important to understand that HTTP 504 errors are usually caused by server-side issues, meaning the problem isn’t with your computer or internet connection but rather with the website’s server itself.

Therefore, resolving these errors often requires the intervention of the website’s administrator or hosting provider. Here are some common causes of 504 and how to address them:

Server Overload

If a server is overloaded with requests, it might not be able to respond in time, leading to a 504 error.

Implement load-balancing techniques and ensure your server has sufficient resources to handle the volume of traffic it receives. Regular monitoring can help identify potential overload issues before they become critical.

Network Errors

Issues with the network, like poor connectivity between the gateway and upstream servers, can result in a 504 error.

Check the network configurations and health of all network equipment. Use network diagnostic tools and logs to identify and resolve any issues.

Faulty Firewall Configuration

Sometimes, firewall configurations may block requests or responses between the gateway and upstream servers, resulting in a 504.

Review your firewall settings and ensure it's not incorrectly blocking any necessary communication.

Server Software Issues

Problems with the server software, such as bugs or misconfigurations, can lead to 504 errors.

Regularly update your server software and review configurations to ensure they're set up correctly.

Problems with CDN Services

If you’re using a Content Delivery Network (CDN) and it fails to get a timely response from your origin server, your users might see a 504.

Check the health of your origin server and your CDN configurations. You might need to contact your CDN provider for further assistance.

Also, you can read the video by Hostinger Academy about How to Fix 504 Gateway Timeout Error:

In all cases, if you’re a website visitor and not the website administrator, and you encounter a 504 error, there’s generally not much you can do. You might try reloading the page, checking the site on another device or network, or reaching out to the website’s contact for support.

HTTP Status Code Checker Tool for Identifying HTTP 504 Errors

Http Status Code Checker

HTTP Status Codes Checker is a powerful tool that can assist in detecting HTTP 504 errors. By simply entering the URL of the website you wish to check, this tool quickly analyzes the HTTP status codes for that site. It can recognize a variety of HTTP status codes, including 504 Gateway Timeout errors. This enables you to promptly spot issues and act accordingly to prevent further problems.

Once the tool identifies a 504, you can quickly troubleshoot and resolve the issue. The detection of this error points toward server-side issues, which might be causing delays or timeouts. This insight can guide you in checking server health, network connectivity, firewall configurations, or CDN settings, to name a few possibilities.

The advantage of using Sitechecker’s tool lies not only in its ability to detect 504 errors but also in its simplicity and ease of use. It’s an excellent aid for maintaining the overall health of your website, ensuring the best user experience, and keeping your SEO rankings strong by minimizing website downtimes and maximizing the efficiency of your troubleshooting process.


The 504 Gateway Timeout error is a server-side HTTP status code indicating a delayed response from an upstream server. This error negatively impacts SEO by hindering site indexing, damaging site reputation, and leading to poor user experience. To maintain SEO rankings, it’s crucial to identify and fix these errors quickly. Common causes include server overload, network issues, faulty firewall configurations, server software problems, and CDN service issues.

The Sitechecker HTTP Status Code Checker tool helps identify these errors promptly, aiding in website health maintenance and user satisfaction.

A 504 gateway timeout occurs when a server, acting as a gateway or proxy, does not get a response from the upstream server it needs to complete the request within a certain time frame. This could be due to server overload, network errors, faulty firewall configurations, server software issues, or problems with CDN services.
Both 502 and 504 are HTTP status codes that indicate server-side errors. A 502 Bad Gateway error means that one server received an invalid response from another server it was communicating with. A 504 Gateway Timeout error indicates that a server, acting as a gateway or proxy, didn't get a timely response from the upstream server to complete a request.
There seems to be confusion between two separate error codes. A 404 is an HTTP status code that means the page you were trying to reach on a website couldn't be found on their server. On the other hand, a 504 error indicates a Gateway Timeout, meaning that an upstream server failed to provide a timely response.
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