Can't connect to Azure Static Web App using default domain.

Question

Hello all. I have a static web app (https://icy-sky-0b3ce1210.6.azurestaticapps.net/). It's a media tracker and as you can tell it's using the auto-generated, default domain by Azure. I deployed my code, but when I try accessing the website. I get a Secure Connection Failed. PR_CONNECT_RESET_ERROR error message in Firefox, a This site can’t be reached. The connection was reset in Chrome, and Hmmm… can't reach this page. The connection was reset in Edge.

Here are the solutions I read and tried:

• Clear browser cookies/cache/history
• Update all browsers to latest versions
• Restart computer
• Restart router and modem
• Change DNS to Google's and Cloudflare's
• Turn proxy and firewall off
• Disable IPv6 on my computer's network adapter settings

So far, I haven't had any luck in resolving the issue. However, here are a few observations I've made

1. The problem does not occur when accessing while being connected to networks other than my WiFi.
2. I have no issue accessing other static web apps like https://calm-ground-0d118d10f.5.azurestaticapps.net. (Perhaps it's a subdomain problem like .5 vs .6 on Microsoft's end?)

Having made these observations, I contacted my ISP (AT&T) and they told me they didn't find any setting that was blocking the .azurestaticapps domain, or any other DNS setting that was preventing access to my website. I then ruled out the possibility that the domain was blocked because I could access other static web apps. So why can't I access my own?

I'm not sure what to do at this point. I tried contacting Azure Support but you have to pay $29 monthly to access them. If anyone has any ideas I would appreciate it greatly.

Thank you for reading this post.

Windows 11 24H2

Answer 1

Hi @Sergio Ochoa,

This does appear to be a DNS caching or routing-related issue. Sometimes local DNS caches hold outdated or incorrect info, open a Command Prompt as an administrator and run ipconfig /flushdns. Then attempt to access your app again. Test if it works on another device on the same network, this will confirm whether the issue is device-dependent or related to your own network.

Even if you have changed your DNS to Google's or Cloudflare's, attempt to set it at the router level rather than on your computer. Google DNS: 8.8.8.8 and 8.8.4.4 Cloudflare DNS: 1.1.1.1 and 1.0.0.1

Check if the domain resolves to an IP address, From Command Prompt, run: nslookup icy-sky-0b3ce1210.6.azurestaticapps.net. If not, a DNS propagation issue is probably the problem.

As you mentioned AT&T reported that they didn't block the domain, some ISPs have filters or security features that might trigger resets. You might try using a VPN to determine if that bypasses the issue.

Sometimes problems can occur on Azure's end as well. You can look at the Azure Status Page to determine if there are any current issues. A new deployment will resolve strange networking or provisioning problems, redeploy: Quickstart: Deploy a Static Web App

Even though you're using the default domain, verify whether any networking restrictions were applied to the app in Azure.

You may need to try temporarily setting a custom domain on your app to check if this will fix the access problem

https://learn.microsoft.com/en-us/azure/static-web-apps/private-endpoint
https://learn.microsoft.com/en-us/azure/static-web-apps/custom-domain

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