Website Downtime Diagnostics: Is It Down for Everyone or Just Me?
Published 2026-08-06 | Author: Elena Rostova | Category: guides
How to troubleshoot site accessibility issues, ISP DNS blocks, server 5xx errors, and local firewall configurations.
## Diagnosing Web Access Outages When a website fails to load, determining whether the outage is global or isolated to your local network connection is the first critical troubleshooting step. --- ## 1. Common Causes of Local Access Failures | Symptom | Root Cause | Fix Strategy | | :--- | :--- | :--- | | **DNS_PROBE_FINISHED_NXDOMAIN** | Stale local DNS cache or ISP block | Flush DNS cache (`ipconfig /flushdns`) or switch to 8.8.8.8 | | **ERR_CONNECTION_TIMED_OUT** | Firewall or router port blocking | Verify local VPN or proxy settings | | **HTTP 502 / 503 Service Unavailable** | Web server application crash | Server-side downtime—await administrative fix | --- ## 2. Cloud Server Uptime Probing Our **Is Down Or Blocked** utility sends ping requests from independent cloud servers, providing instant confirmation whether a domain is globally offline or responding normally.Recommended Developer Tools
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