Guide to Fix DNS Caching Issues on Wi-Fi Networks

If you're having trouble accessing a site on your Wi-Fi network but can reach it via mobile data, the issue is likely due to DNS caching. When DNS records are updated (e.g., after fixing a domain issue), it can take some time for the new information to update across all networks. Your Wi-Fi network might still be using outdated DNS data, while your mobile network uses different DNS servers. 

To resolve this, follow these steps:

1. Restart Your Router: Restarting your router can help it fetch updated DNS records.
   
2. Switch to a Public DNS Server: Temporarily change your DNS settings to use a public DNS server such as Google's DNS (8.8.8.8 and 8.8.4.4) or Cloudflare's DNS (1.1.1.1 and 1.0.0.1). For example, in any Chrome-based browser, open the settings menu, go to Privacy and security > Security. Scroll down until you see "Select DNS Provider" and choose either Clouldflare (1.1.1.1) or Google (Public DNS) from the dropdown list.
   
3. Flush DNS Cache:
   • Windows: Open Command Prompt and type: ipconfig /flushdns
   • MacOS: Open Terminal and type: sudo killall -HUP mDNSResponder
   • Linux: Open Terminal and type: sudo systemctl restart NetworkManager or sudo /etc/init.d/nscd restart2
4. Clear Browser Cache: Clear the browser cache or use incognito/private mode to avoid loading a cached version of the site.

These steps should resolve the DNS issue and restore access to the site on your Wi-Fi network.