Seeing an internet error like DNS_PROBE_FINISHED_NXDOMAIN or ERR_CONNECTION_TIMED_OUT can be confusing — but most errors are easy to fix once you understand what they mean.
This page contains simple, step-by-step guides to the most common internet and DNS errors, including what causes them and how to fix them quickly.
🔴 DNS Errors
Your browser cannot find the website’s IP address
- DNS_PROBE_FINISHED_NXDOMAIN — Domain not found by DNS server
- ERR_NAME_NOT_RESOLVED — Chrome cannot resolve the domain name
- Server IP address could not be found — DNS lookup failed completely
- DNS Server Not Responding — Your DNS server is unreachable
- This site can’t be reached — Chrome’s umbrella error for any connection failure
- Your DNS server might be unavailable — DNS server is unreachable
- DNS_PROBE_FINISHED_NO_INTERNET — No internet during DNS lookup
🟠 Connection Errors
Your browser reached the server but the connection failed
- ERR_CONNECTION_TIMED_OUT — Server took too long to respond
- ERR_CONNECTION_REFUSED — Server actively rejected the connection
- ERR_INTERNET_DISCONNECTED — No internet connection at all
- ERR_NETWORK_CHANGED — Network changed while page was loading
- ERR_ADDRESS_UNREACHABLE — No route exists to the server
- ERR_EMPTY_RESPONSE — Server connected but sent no data
- Request timed out — Ping or network request got no reply
- ERR_CONNECTION_RESET — Connection was unexpectedly closed
- ERR_TIMED_OUT — Server took too long to respond
- Windows can’t connect to this network — Network authentication failed
- Unidentified network — Network detected but no internet access
- Limited connectivity / No internet access — Connected but no data transfer
- ERR_BLOCKED_BY_CLIENT — Request blocked by browser or extension
🔒 SSL / Certificate Errors
Problems with the website’s security certificate
- ERR_SSL_PROTOCOL_ERROR — HTTPS handshake failed
- ERR_CERT_AUTHORITY_INVALID — Certificate not trusted by Chrome
- ERR_CERT_DATE_INVALID — SSL certificate expired or incorrect date
- ERR_SSL_VERSION_OR_CIPHER_MISMATCH — SSL protocol mismatch
- ERR_BAD_SSL_CLIENT_AUTH_CERT — Client certificate authentication failed
🟡 HTTP Status Errors
The server responded but with an error code
- 403 Forbidden — You don’t have permission to access this page
- 404 Not Found — The page does not exist
- 500 Internal Server Error — Something broke on the server
- 502 Bad Gateway — Gateway got a bad response from upstream
- 503 Service Unavailable — Server temporarily down or overloaded
- 504 Gateway Timeout — Gateway timed out waiting for upstream
🔧 Browser & Proxy Errors
Issues with your browser settings or proxy configuration
- ERR_TOO_MANY_REDIRECTS — Endless redirect loop
- ERR_PROXY_CONNECTION_FAILED — Proxy server unreachable
- ERR_CACHE_MISS — Form data no longer in cache
💻 Windows Network Errors
Errors shown in Windows network status
No Internet, Secured — Connected to Wi-Fi but no internet access
🔍 What Causes Internet Errors?
Most internet errors are caused by issues with DNS, your internet connection, or the website you’re trying to access.
- DNS issues: Your device cannot find the correct IP address
- Connection problems: Your internet is slow or unstable
- Server issues: The website may be down or unreachable
- ISP restrictions: Some networks block certain websites
🛠️ Quick Fixes You Can Try
- Restart your router and modem
- Clear your browser cache
- Flush your DNS cache
- Switch to a public DNS (8.8.8.8 or 1.1.1.1)
- Check your internet connection
🔎 Check Your Internet Connection
If you’re still having issues, you can check your current IP address and connection status:
👉 Check My IP Address & Connection
🔐 Fix Errors Caused by Network Restrictions
Some internet errors happen because your ISP blocks certain websites or DNS requests.
Using a VPN can help bypass these restrictions and restore access.