502 Bad Gateway error is an HTTP status code error (HTTP Status Code), which means that a server (server) receives an "invalid" response from another server (server).

502 Bad Gateway error

1. A sign to identify 502 Bad Gateway error

Bad Gateway error on each site will be different. However, if you get a Bad Gateway error, you will see one of the following error messages:

"502 Bad Gateway"

"502 Service Temporarily Overloaded"

"Error 502"

"Temporary Error (502)"

"502 Proxy Error"

"502 Server Error: The server has encountered an error temporary và không thể hoàn thành yêu cầu."

"HTTP 502"

"502. That's an error."

"Bad Gateway: The proxy server đã nhận một câu lệnh không hợp lệ từ máy phục vụ upstream."

"HTTP Error 502 - Bad Gateway"

The 502 Bad Gateway error displayed in the Internet browser window is similar to the web page.

"Fail Whale" is one of Twitter's "notorious" errors, and the nature of this error is the 502 Bad Gateway error.

The Bad Bad Gateway in Windows Update often generates error code 0x80244021 or error message WU_E_PT_HTTP_STATUS_BAD_GATEWAY.

When Google services, such as Google Search or Gmail, a 502 Bad Gateway error usually displays Server Error (server error) or in some cases simply displays 502 on the screen.

2. Causes of 502 Bad Gateway error

Typically, Bad Gateway errors occur because of problems between online servers (online servers) that you cannot "control".

Note:

Microsoft IIS web server management system often provides more detailed information about the cause of 502 Bad Gateway error by adding additional parameters after 502, such as HTTP Error 502.3 - Web server received một câu lệnh không hợp lệ trong khi làm việc với gateway hay proxy.

3. Some solutions to overcome 502 Bad Gateway error

As mentioned above, the cause of 502 Bad Gateway error is due to a server error that is congested or due to certain incidents that you cannot control.

To fix this error you can refer to some solutions below:

1. Reload the URL code again

Try reloading the URL again by pressing the F5 key , or clicking the Refresh  / Reloadbutton .

502 Bad Gateway error occurs because the server is temporarily suspended for upgrade, it is only a temporary error, so you can apply the solution to reload the page again to fix the error.

2. Restart your browser

Close all windows on your browser, then reopen the browser again, and try opening the website you want to visit again.

Error 502 may occur because your computer has a problem while you browse the web in the browser. The easiest way to fix 502 error in this case is to restart your browser.

3. Clear the browser cache

"Outdated" files or corrupted files stored on your browser may cause 502 errors. In this case, just delete the cache files and try opening the page you want. Access is done.

Refer to the steps to clear cache on browsers here.

4. Delete browser cookies

Files that are "outdated" or corrupted files stored on your browser may cause 502 errors. If you have applied a solution to delete browser cache files, you still don't Fix the 502 error, you can think of the solution is to delete cookies on the web browser to fix the error.

Refer to the steps for clearing cookies on browsers here .

Note: If you do not want to delete all cookies on your browser, you can find and delete cookies related to the website you accessed with 502 errors.

5. Start the browser in Safe Mode

When your browser runs in Safe Mode it means that the browser will run with the default settings, no add-ons, extensions and toolbar.

In the process of running the browser in Safe Mode, if there is no 502 error, then you can confirm that the cause of 502 error is due to the extension or browser installation. Then you just need to reset the browser settings to the default mode or find disabled extensions that are causing the error.

Note: To run the browser in Safe Mode, you just need to start your Windows computer in Safe Mode and run any browser that you use often.

6. Use another alternative browser

You can use another alternative browser, such as Chrome, Firefox, Internet Explorer, Micorsoft Edge or Safari.

If you have applied the above solutions and still cannot fix the 502 error, you can use another alternative browser to browse the web. If there is no 502 error on other alternate browsers, the cause of the error may be a problem with your original browser. You can then uninstall the browser, then download and reinstall the browser to fix the error.

7. Use Software Update 1 for Microsoft Forefront Threat Management Gateway (TMG) 2010 Service Pack 1

If you have installed Forefront TMG SP1 and you are accessing a website, you receive an Error Code: 502 Proxy Error. Lỗi logon network. (1790) or other similar error messages.

You can then download and install Software Update 1 for Microsoft Forefront Threat Management Gateway (TMG) 2010 Service Pack 1 to fix the problem.

Download Software Update 1 for Microsoft Forefront Threat Management Gateway (TMG) 2010 Service Pack 1 to your computer and install it here .

Note:

This solution is not a general solution to fix 502 Proxy Error but can only be applied in some specific cases.

8. Restart your computer

Some temporary problems while your computer is connected to the Internet can cause 502 errors. This is very simple, you just need to reboot your computer to fix the problem. .

9. Restart the network device

Sometimes in some cases, modem problems, routers, switches or other network devices may also cause 502 errors or 502 Bad Gateway errors. In this case, you just need to reboot the device: modem, router, switches ... again.

10. Change DNS

Change DNS on Servers, or your router, computer or devices. Sometimes Bad Gateway errors occur because of temporary problems on DNS Servers.

11. Contact the website directly

This is also a good solution to fix 502 Bad Gateway error. It is very likely that in many cases, the website is faulty and the Admin of the site has not "fix" the error, and this is the cause of 502 Bad Gateway error.

You can visit the Website Contact Information page to see the contact list for some popular websites today. Most websites have social network accounts used to support their services, some websites include email and phone numbers so users can contact.

12. Contact your Internet service provider

The final solution to fix 502 Bad Gateway error is that you can contact your Internet Service Provider (Internet Service Provider) to find out the cause and fix the error.

Refer to some of the following articles:

Good luck!