How to fix the error ERR_CONNECTION_CLOSED

The error ERR_CONNECTION_CLOSED in your browser indicates that the connection to the server was closed unexpectedly. This can occur for several reasons, including network issues, browser settings, or server-side problems. Here’s a step-by-step guide to troubleshoot and fix this error:

1. Check Your Internet Connection

• Ensure your device is connected to the internet.
• Restart your router or modem.
• Try visiting other websites to confirm if the issue is specific to one site.

2. Clear Browser Cache and Cookies

• Google Chrome:
  1. Open Chrome settings (chrome://settings/clearBrowserData).
  2. Select Cookies and other site data and Cached images and files.
  3. Click Clear data.

3. Disable Proxy or VPN

• If you’re using a proxy or VPN, disable it temporarily:
  • Windows:
    1. Go to Settings ? Network & Internet ? Proxy.
    2. Turn off Use a proxy server.
  • Mac:
    1. Open System Preferences ? Network.
    2. Select your active connection and click Advanced.
    3. Go to the Proxies tab and uncheck any enabled proxies.

4. Reset Your TCP/IP Stack

• Windows:
  1. Open Command Prompt as Administrator.
  2. Run the following commands one by one:
     bash

     Copy code

     netsh int ip reset
netsh winsock reset
ipconfig /flushdns

  3. Restart your computer.
• Mac:
  1. Open Terminal.
  2. Flush DNS using:
     bash

     Copy code

     sudo dscacheutil -flushcache
sudo killall -HUP mDNSResponder


5. Update Your Browser

• Make sure you’re using the latest version of your browser. Update it if necessary.

6. Disable Browser Extensions

• Extensions can sometimes interfere with connections:
  1. Open your browser’s extensions page (chrome://extensions for Chrome).
  2. Disable all extensions and see if the issue resolves.
  3. Enable them one by one to identify the culprit.

7. Check for Malware

• Run a scan using reliable anti-malware software like Malwarebytes to ensure your system is not infected.

8. Disable Firewall or Antivirus Temporarily

• Sometimes, overzealous firewalls or antivirus programs block connections:
  • Disable them temporarily to see if the issue resolves.
  • If it works, adjust their settings to whitelist your browser.

9. Verify DNS Settings

• Use Google’s public DNS:
  • Windows:
    1. Go to Network and Sharing Center ? Change adapter settings.
    2. Right-click your active connection ? Properties.
    3. Select Internet Protocol Version 4 (TCP/IPv4) ? Properties.
    4. Use the following DNS server addresses:
       • Preferred: 8.8.8.8
       • Alternate: 8.8.4.4
  • Mac:
    1. Go to System Preferences ? Network.
    2. Select your connection ? Advanced ? DNS.
    3. Add 8.8.8.8 and 8.8.4.4.

10. Check the Website or Server

• The server hosting the website might be down. Try accessing the site from another device or network.

11. Reinstall or Reset Browser

• If nothing else works, reinstall or reset your browser to default settings.

12. Contact Your ISP

• If the issue persists, your Internet Service Provider might have a network problem. Contact them for assistance.