Quick answer
A practical guide to checking website outages, distinguishing local connection problems from real downtime, and deciding when to use external uptime monitoring.
Start with one simple question
When a website does not open, the first task is to determine whether the problem affects only your connection or the website itself. Try the page from another network, check whether the DNS name resolves, and look for a consistent HTTP response or timeout.
Common signs of a real outage
Repeated connection timeouts, DNS failures affecting multiple networks, server-side 5xx responses, or a service that fails from an independent monitoring location are stronger evidence than one failed browser refresh. Browser caching can also make a site appear healthy after the origin has changed.
Why an external monitor helps
Manual checks are useful for troubleshooting, but they do not watch your site while you sleep. An external monitor continuously checks the endpoint and records when it changes from healthy to unhealthy. That gives you a timestamp and alert instead of waiting for a customer to report the problem.
Do not stop at the homepage
A green homepage does not prove checkout, login, a private API, or a database is healthy. Use a monitor that can check the exact layer that matters to your application. For example, a TCP check can test whether PostgreSQL is accepting connections while an API monitor can validate an authenticated endpoint.
When to automate
If downtime matters to revenue, customer access, or service-level reporting, move from occasional manual checks to continuous monitoring. PingStag lets teams monitor websites, APIs, TCP ports, and heartbeats from one workspace.
Sources and references
Related PingStag guides
What Is Website Uptime Monitoring? A Practical Guide
Understand how website uptime monitoring works, what uptime percentages mean, how outages are detected, and where application-level checks go beyond a basic ping.
How to Monitor HTTP 500 Internal Server Errors
Learn what HTTP 500 means, why a site can appear intermittently broken, and how to detect recurring server-side failures before customers report them.
HTTP 502 Bad Gateway: Causes, Checks and Monitoring
Understand HTTP 502 Bad Gateway errors, what they usually indicate, and how to monitor upstream failures without relying on manual refreshes.
HTTP 503 Service Unavailable: How to Detect It Early
What HTTP 503 means, why temporary overloads and maintenance windows cause it, and how uptime monitoring can catch recurring service unavailability.
