Windows 10: SmartScreen and Microsoft Store Fail — Azure Gateway 502 / CDN Routing Failure

StartFragmentI'm experiencing ongoing issues with Microsoft services, likely due to a SmartScreen or CDN backend failure. The Microsoft Store fails to initialize, Teams shows an auth banner, and SmartScreen blocks installers like WhatsApp "SmartScreen can't be reached". Accessing https://smartscreen-prod.microsoft.com returns a 502 Bad Gateway Microsoft-Azure-Application-Gateway/v2. Tried: public DoT DNS Cloudflare, Quad9, multiple VPNs, cert revocation off, curl tests error CRYPT_E_NO_REVOCATION_CHECK, and verified system services. SmartScreen resolves to: 4.153.57.10 via prod-agic-eu

:)

 

How To Fix 502 Bad Gateway Error?

Hi Jack,

You can fix
Error 502 by doing the following methods:

1. Refresh your browser and reopen it: First, you need to close your current browser and hold up a couple of moments and reopen it. It is because Sometimes your browser may stop responding due to accessing the heavy traffic of data at the
   same time or maybe an error page is inserted in between the pages which are loading. Even you try on another browser as well.
2. Reset Internet configuration: You need to restart your internet modem. to do this, Unplug your internet modem and hold up for 5 seconds, after it completely turns off, Plugs it again and Wait for your computer to establish a connection
   again.
3. Disable CDN temporarily: The Content Delivery Network or commonly known as CDN improves the loading speed of a website but it can generate error 502 as well due to the firewalls. To overcome this issue, you can disable the CDN temporarily.

 

Battlecard for Azure CDN vs. Cloudflare

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502 gateway error; 1 day old computer

Bad gateway refers to http error 502 which is mean that a server which is try to fulfill the client request received an invalid response from upstream server. It is often a network error between servers on the internet, meaning the problem wouldn't be
with your computer or internet connection. Empty or incomplete headers or response body typically caused by broken connections or server side crash can cause 502 errors if accessed via a gateway or proxy. Since it's just a generic error, it doesn't actually
tell you the website's exact issue.

How to Solve
502 Errors

• Perform a hard-refresh in your browser. On Macs, this is done by pressing Cmd + Shift + R.
• Clear your browser cache and delete cookies. Your browser may be holding on to certain files that were saved once you visited the website with a 502 error.
• Change your DNS servers. If you’ve never changed them in the past you likely still have the default servers assigned to you by your ISP, try using open DNS servers such as Google's Public DNS.
• Finally, restart your computer/networking equipment. Some temporary issues with your computer and how it's connecting to your network could be causing 502 errors, especially if you're seeing the error on more than one website. In these cases, a restart
  would help.