ERR_CONNECTION_RESET Error: Connection Reset — Diagnosis and Resolution

What is the ERR_CONNECTION_RESET Error

The ERR_CONNECTION_RESET error (or "Connection Reset") means that the server you are trying to connect to has forcibly terminated the TCP connection. The browser received a reset (RST) signal and could not complete the request.

Main Causes

1. The server is overloaded and is rejecting new connections.
2. A firewall or WAF on the server side is blocking your IP.
3. An antivirus with HTTPS scanning intercepts and breaks the connection.
4. Problems with the SSL certificate on the server.
5. A VPN or proxy has incorrect settings.
6. Your IP has been blacklisted on the server.
7. An unstable internet connection.

How to Fix the ERR_CONNECTION_RESET Error

1. Check the Site in Another Browser

Open the problematic site in:

• Another browser (Firefox → Chrome or vice versa)
• Incognito mode

If it works — clear the cache and cookies of your main browser.

2. Clear Your Browser Cache

Chrome:

1. Press Ctrl+Shift+Delete
2. Select "All time"
3. Check "Cookies and other site data" and "Cached images and files"
4. Click "Clear data"

Firefox:

1. Press Ctrl+Shift+Delete
2. Select "Everything"
3. Click "OK"

3. Disable Your Antivirus

Temporarily disable:

• Antivirus software (Avast, Kaspersky, Dr.Web)
• Browser extensions
• VPN

If the site opens after disabling — add the site to your antivirus's exceptions list.

4. Check the Site's Status

Use:

• Downdetector
• Is It Down Right Now

If the site is down — wait for it to recover.

5. Change Your DNS

1. Open "Network Connections"
2. Select the active adapter → "Properties"
3. Internet Protocol Version 4 (TCP/IPv4) → "Properties"
4. Enter DNS:
   • Google: 8.8.8.8 and 8.8.4.4
   • Cloudflare: 1.1.1.1 and 1.0.0.1

6. Reset Network Settings

Windows:

ipconfig /flushdns
ipconfig /release
ipconfig /renew

macOS:

sudo killall -HUP mDNSResponder

Linux:

sudo systemd-resolve --flush-caches

Prevention

• Use a reliable DNS (Google or Cloudflare).
• Regularly clear your browser cache.
• Avoid overusing VPNs — some servers block them.
• Monitor the site's status via notifications (DownDetector).